Betterbird Changelog

What's new in Betterbird 115.10.0-bb27 (02 May 2024)

May 7, 2024

FIXED - Improvements to feed subscribe dialog, OPML file third party import, feed drag/drop in folderpane and subscribe dialog

New in Betterbird 115.10.0-bb27 (27 April 2024) (Apr 28, 2024)

New in Betterbird 115.10.0-bb27 Hotfix (17 April 2024) (Apr 18, 2024)

Thunderbird 115.10.0 introduced a shutdown hang.
We have replaced Betterbird 115.10.0-bb27 with 115.10.0-bb27-hotfix on 17 April 2024.
Based on Thunderbird 115.10.0, release notes:
Q: Why is there no Betterbird 115.10.1 release?
A: Thunderbird 115.10.0 contained a severe shutdown hang. We're shipping a 115.10.0-bb27 "Hotfix" update instead of shipping a new version.
Fixed in this version:
CHANGED - Switched Windows system notifications to new Mozilla platform code to improve registering in the Windows Action Centre on Windows 11
FIXED - A combination of text filter, negated tag filter and more than one tag button selected/negated sometimes gave wrong results
FIXED - Encoding problem when editing message headers under certain circumstances
Fixed in Betterbird, not fixed in Thunderbird 115.10.0 yet:
Fixes provided by the Betterbird project and integrated into Thunderbird to be released later
FIXED - Left-over temporary directories pid-NNNN and other temporary files (fixed in 115.7.0) - Bug 1873950
FIXED - A sound was sometimes played for new feed messages even if disabled with pref mail.feed.play_sound. New prefs mail.feed.play_sound.type and mail.feed.play_sound.url to configure feed notification sounds if desired (fixed in 115.6.1) - Bug 1871493
FIXED - Undo/Redo not working on stand-alone message window (fixed in 115.3.2) - Bug 1855643
FIXED - Delivery status notification (DSN) request not working when "Send Later" is used (fixed in 115.3.0) - Bug 815638
Various minor fixes that Thunderbird isn't shipping yet:
Bug 522768 Bug 531319 Bug 956446 Bug 1368011 Bug 1520435 Bug 1678057 Bug 1799368 Bug 1811214 Bug 1812726 Bug 1823024 Bug 1837152 Bug 1843221 Bug 1851975 Bug 1854138 Bug 1859271 Bug 1861200 Bug 1862519 Bug 1862521 Bug 1862978 Bug 1865598 Bug 1868094 Bug 1868718 Bug 1870873 Bug 1873282 Bug 1873313 Bug 1873607 Bug 1875577 Bug 1876431 Bug 1876662 Bug 1877774 Bug 1877962 Bug 1880043 Bug 1884661
Features and fixes exclusive to Betterbird (new in the 115 series):
CHANGED - "Quick Filter untagged messages" replaced with "Quick Filter button negation" (incl. untagged messages) (fixed in 115.9.0) - Bug 683809 Bug 744365
FIXED - Usage of add-on "Grammar Checker & Paraphraser – LanguageTool" prevented downgrade of message to plain text (fixed in 115.9.0)
FIXED - Linux-only: Better detection of Gnome desktop to avoid crash related to system tray notifications (fixed in 115.9.0)
FIXED - Subject sometimes not spell-checked (fixed in 115.9.0) - Bug 1884761
FIXED - Unexpected: There are non-ASCII characters in the local part of the recipient address and your server does not support SMTPUTF8. (fixed in 115.9.0) - Bug 1885285
FIXED again - Incorrect total new message count in system tray tooltip and Windows taskbar badge (inconsistent with sum of folder counts) in rare cases (fixed in 115.9.0)
FIXED - Setting prefs mail.addressDisplayAuthor and mail.addressDisplayRecipients had no effect on a new profile (fixed in 115.9.0)
FIXED - Re-established secondary sort by date in "Grouped by Sort" views (fixed in 115.9.0) - Bug 1873353 NEW - Editing of message headers. The Edit Headers menu item is found in the message toolbar More Actions menu. By default the message subject is editable, use pref mail.messageEditor.editableHeaders to allow for more headers. (fixed in 115.8.1)
NEW - Message rethreading via drag & drop or the keyboard. See this paragraph for details. (fixed in 115.8.1)
FIXED - The additional total count in the status bar not always updating when a folder is entered or threads are collapsed or expanded (fixed in 115.8.1)
FIXED - Issue when using Quick Filter Bar with untagged messages (was broken in 115.8.0) (fixed in 115.8.1)
NEW - Preference mail.threadpane.full_row_color to fully colour rows in multi-folder views (fixed in 115.8.0)
FIXED - Some glitches with the arrow alignment in the correspondents column in multi-line view (fixed in 115.8.0)
CHANGED - Row height in compact density increased by 10% (from 18 px to 20 px) in thread pane, folder pane, address book and account manager (fixed in 115.8.0)
FIXED - Linux-only: Crash on Gnome when using Wayland related to system tray notifications (fixed in 115.8.0) - GitHub #266
WITHDRAWN - Quick filter tag bar doesn't refresh when other quick filter conditions change (only in 115.8.0) - Bug 1830439
FIXED - Some issues when editing plaintext quotes, mostly disappearing empty lines. Improves rewrap somewhat. (fixed in 115.8.0) - Bug 1787577 Bug 1851951
FIXED - Some unneeded logging to the Error Console (fixed in 115.8.0)
CHANGED - When folder had manually reordered subfolders, new subfolders were added at the end. Now they are added semi-alphabetically. (fixed in 115.7.0)
CHANGED - The total count in the status bar will now show an additional lesser second count if threads are hidden or collapsed (fixed in 115.7.0)
CHANGED - Default column order: Unread indicator column now precedes subject column (fixed in 115.7.0)
CHANGED - Complex search terms: Disallow group start immediately following group start (fixed in 115.7.0) - GitHub #256
FIXED - Console errors related to Apple's CalDAV property X-APPLE-STRUCTURED-LOCATION (fixed in 115.7.0)
FIXED - Attached images not reliably scaled when attachments viewed inline (fixed in 115.7.0) - Bug 1875325
FIXED - "Open Link in Browser" in compose window via context menu not reliable (fixed in 115.7.0) - Bug 695142
FIXED - Wrong folder sometimes briefly displayed at startup impacting performance (fixed in 115.7.0) - Bug 1874557
FIXED - Incorrect total new message count in system tray tooltip and Windows taskbar badge (inconsistent with sum of folder counts) in rare cases (fixed in 115.7.0)
FIXED - Regular expression search in (non-existent) message headers delivering false positives (fixed in 115.7.0)
NEW - New preference mail.folderpane.expand_delay (fixed in 115.6.1)
NEW - Column indicators for secondary search and icon columns (fixed in 115.6.1) - Bug 323067
CHANGED - Regular expression matching in search terms now using ICU's regular expression matching rather than std::regex (fixed in 115.6.1)
CHANGED - Enhancements to the splitters in the compose window, can now all be operated via the keyboard (fixed in 115.6.1)
CHANGED - Duplicate results of global search originating from Gmail's "All Mail" folder no longer displayed in the result list (fixed in 115.6.1) - GitHub #224
FIXED - Add-on installation problem on some Linux distributions incl. the one shipping with Chrome OS (fixed in 115.6.1) - Bug 1829370
FIXED - Some issues when manually re-ordering folders of (localised) Gmail account or local trash folder (fixed in 115.6.1)
NEW - Account colours part 2 and 3: Message list (unified folders only) and Write/compose window (fixed in 115.6.0)
FIXED - Crash when entering an invalid regular expression into a filter search term (fixed in 115.6.0)
FIXED - Phantom rows and search problems relating to too many folders being searched. Should now work with up to 6144 folders. On Linux, increase ulimit -n according to the number of folders in the profile. (fixed in 115.6.0)
NEW - End-of-year Donation campaign: Betterbird will ask for a donation. This is only once per profile per year. (fixed in 115.5.2)
NEW - Account colours part 1: Account Manager and folder pane. (fixed in 115.5.2). Note: Color black (#000000) is interpreted as "no colour". The chosen colour is applied with 20% opacity.
NEW - More layouts: "Wide thread" (thread pane wide on top, folder and preview pane below), "Stacked" (folder pane and thread pane both on the left) (fixed in 115.5.2)
NEW - Attachment list on top in Write (compose) window
NEW - Make tabs session restore optional. Option to restore no tabs, system tabs or all tabs. (fixed in 115.5.2)- Bug 506526
CHANGED - Thread pane can now be collapsed to the height of one row (fixed in 115.5.2) - Bug 1855611
FIXED - Minimise to tray not working on Linux if attempted before tray icon shows for the first time (fixed in 115.5.2) - GitHub #227
NEW - Quick filter and folder search in S/MIME encrypted messages (fixed in 115.5.1)
FIXED - Global search in S/MIME encrypted messages not working (fixed in 115.5.1)
FIXED - Problem with manually sorting (ordering) IMAP folders in folder pane (fixed in 115.5.1)
FIXED - Empty "phantom" content tabs appearing after startup-up (fixed in 115.5.1)
RESTORED - Windows system notifications (fixed in 115.5.0)
NEW - Ability to manually sort (order) folders in folder pane (most of the work by the Thunderbird team, adjustments by Betterbird) (fixed in 115.5.0) - Bug 1846550, Bug 1864510, Bug 1864582
NEW - Introduced pref betterbird.update.checkIntervalDays to configure time between update checks (in days) (fixed in 115.5.0)
FIXED - Turning multi-line view on/off wasn't immediately reflected in the thread pane/message list (fixed in 115.5.0)
FIXED - Performance issue when using search/virtual folders (fixed in 115.5.0) - Bug 1864247
FIXED - Checking for add-on updates hung at "Updating add-ons" under some circumstances (fixed in 115.5.0)
FIXED - Error Console output when checking updates for add-ons not hosted on ATN (fixed in 115.4.2) - Bug 1861372
FIXED - After restart, unread/total message counts not shown for collapsed servers in the folder tree (fixed in 115.4.2) - Bug 1835548
NEW - Shift+Click on "Mark Folder Read" will also mark all sub-folders as read (fixed in 115.4.0) - Bug 500762
CHANGED - On Windows Betterbird now uses its own registry entries to better co-exist with a Thunderbird installation (fixed in 115.4.0)
FIXED - Bad X-MOZ-LASTACK attributes from iCloud CalDAV calendars not tolerated (fixed in 115.4.0) - Bug 1849849
FIXED - Couldn't open or save encrypted message attachment (fixed in 115.4.0) - Bug 1689326, Bug 1837247
NEW - Pref mail.download.open_attachments_readonly to disable that attachments are opened read-only (fixed in 115.3.2)
FIXED - Fixed broken activation when clicking system tray icon on some Linux KDE installations (fixed in 115.3.2)
CHANGED - Improved activation when clicking system tray icon on Linux Mate (fixed in 115.3.2)
NEW - "Open Link in Browser" in compose window via context menu (fixed in 115.3.1) - Bug 695142
FIXED - SMTP: Limit messages per connection with new pref mail.smtpserver.default.max_messages_per_connection (fixed in 115.3.1) - Bug 1854567
RESTORED - Menu bar at the top of the main window (not underneath the new unified toolbar)
RESTORED - Total and unread/selected count removed from status bar (further improvements in 115.1.0, GitHub #183) - Bug 1831667
RESTORED - No more connecting lines in threaded view - Bug 1829470
RESTORED - Visual feedback during Quick Filter Search - Bug 1831500
RESTORED - Broken feed functionality, a lot of breakage in Thunderbird "Supernova": Feed updates, icons, etc.
MITIGATED - Problem with restoring message and folder tabs after restart on large profiles with many calendars - Bug 1841411
NEW - Vertically aligned tabs
NEW - Attachment list on top
NEW - Header pane resize
NEW - Minimize to system tray on Linux (KDE, Gnome and Xfce desktops), improved in 115.2.1
CHANGED - Improved portable launcher. Portable installation can now be moved without loss of functionality
CHANGED - New program icons for Mac (compliant with Apple rules)
CHANGED - Tab titles restore quicker (not a fix for tab restoral problem, see above)
CHANGED - More Troubleshooting Information now also displays identity and server keys
NEW - New preference gloda.list.immediate to show the search result as list immediately without having to click "Show results as list". Values: 0: Facet view, 1: Facet view and list view, 2: List view only. - Bug 580252
FIXED better - Display/repair of some messages (incl. subject) with incorrect charset headers - Bug 1739609
FIXED - Can't drag contact on mailing list in other address book - Bug 1782397
FIXED - Invalid Atom feeds with missing title not accepted, for example German Heise c't feed

New in Betterbird 115.9.0-bb26 Build 2 (22 March 2024) (Mar 28, 2024)

New in Betterbird 115.9.0-bb26 Build 2 (19 March 2024) (Mar 20, 2024)

Fixed in this version:
CHANGED - "Quick Filter untagged messages" replaced with "Quick Filter button negation" (incl. untagged messages). Note: A combination of text filter, negated tag filter and more than one tag button selected/negated may give wrong results. - Bug 683809
Bug 744365
FIXED - Usage of add-on "Grammar Checker & Paraphraser – LanguageTool" prevented downgrade of message to plain text
FIXED - Linux-only: Better detection of Gnome desktop to avoid crash related to system tray notifications
FIXED - Subject sometimes not spell-checked - Bug 1884761
FIXED - Unexpected: There are non-ASCII characters in the local part of the recipient address and your server does not support SMTPUTF8. - Bug 1885285
FIXED again - Incorrect total new message count in system tray tooltip and Windows taskbar badge (inconsistent with sum of folder counts) in rare cases
FIXED - Setting prefs mail.addressDisplayAuthor and mail.addressDisplayRecipients had no effect on a new profile
FIXED - Re-established secondary sort by date in "Grouped by Sort" views - Bug 1873353
Fixed in Betterbird, not fixed in Thunderbird 115.9.0 yet:
Fixes provided by the Betterbird project and integrated into Thunderbird to be released later
FIXED - Left-over temporary directories pid-NNNN and other temporary files (fixed in 115.7.0) - Bug 1873950
FIXED - A sound was sometimes played for new feed messages even if disabled with pref mail.feed.play_sound. New prefs mail.feed.play_sound.type and mail.feed.play_sound.url to configure feed notification sounds if desired (fixed in 115.6.1) - Bug 1871493
FIXED - Undo/Redo not working on stand-alone message window (fixed in 115.3.2) - Bug 1855643
FIXED - Delivery status notification (DSN) request not working when "Send Later" is used (fixed in 115.3.0) - Bug 815638
Various minor fixes that Thunderbird isn't shipping yet:
Bug 522768 Bug 531319 Bug 956446 Bug 1368011 Bug 1427546 Bug 1520435 Bug 1678057 Bug 1799368 Bug 1811214 Bug 1812726 Bug 1823024 Bug 1833031 Bug 1837152 Bug 1843221 Bug 1847265 Bug 1851975 Bug 1854138 Bug 1859271 Bug 1861200 Bug 1862519 Bug 1862521 Bug 1862978 Bug 1863820 Bug 1865598 Bug 1867091 Bug 1868094 Bug 1868718 Bug 1870873 Bug 1873282 Bug 1873313 Bug 1873607 Bug 1874450 Bug 1875577 Bug 1876431 Bug 1876662 Bug 1877774 Bug 1877962 Bug 1880043 Bug 1881124 Bug 1884661
Features and fixes exclusive to Betterbird (new in the 115 series):
NEW - Editing of message headers. The Edit Headers menu item is found in the message toolbar More Actions menu. By default the message subject is editable, use pref mail.messageEditor.editableHeaders to allow for more headers. (fixed in 115.8.1)
NEW - Message rethreading via drag & drop or the keyboard. See this paragraph for details. (fixed in 115.8.1)
FIXED - The additional total count in the status bar not always updating when a folder is entered or threads are collapsed or expanded (fixed in 115.8.1)
FIXED - Issue when using Quick Filter Bar with untagged messages (was broken in 115.8.0) (fixed in 115.8.1)
NEW - Preference mail.threadpane.full_row_color to fully colour rows in multi-folder views (fixed in 115.8.0)
FIXED - Some glitches with the arrow alignment in the correspondents column in multi-line view (fixed in 115.8.0)
CHANGED - Row height in compact density increased by 10% (from 18 px to 20 px) in thread pane, folder pane, address book and account manager (fixed in 115.8.0)
FIXED - Linux-only: Crash on Gnome when using Wayland related to system tray notifications (fixed in 115.8.0) - GitHub #266
WITHDRAWN - Quick filter tag bar doesn't refresh when other quick filter conditions change (only in 115.8.0) - Bug 1830439
FIXED - Some issues when editing plaintext quotes, mostly disappearing empty lines. Improves rewrap somewhat. (fixed in 115.8.0) - Bug 1787577 Bug 1851951
FIXED - Some unneeded logging to the Error Console (fixed in 115.8.0)
CHANGED - When folder had manually reordered subfolders, new subfolders were added at the end. Now they are added semi-alphabetically. (fixed in 115.7.0)
CHANGED - The total count in the status bar will now show an additional lesser second count if threads are hidden or collapsed (fixed in 115.7.0)
CHANGED - Default column order: Unread indicator column now precedes subject column (fixed in 115.7.0)
CHANGED - Complex search terms: Disallow group start immediately following group start (fixed in 115.7.0) - GitHub #256
FIXED - Console errors related to Apple's CalDAV property X-APPLE-STRUCTURED-LOCATION (fixed in 115.7.0)
FIXED - Attached images not reliably scaled when attachments viewed inline (fixed in 115.7.0) - Bug 1875325
FIXED - "Open Link in Browser" in compose window via context menu not reliable (fixed in 115.7.0) - Bug 695142
FIXED - Wrong folder sometimes briefly displayed at startup impacting performance (fixed in 115.7.0) - Bug 1874557
FIXED - Incorrect total new message count in system tray tooltip and Windows taskbar badge (inconsistent with sum of folder counts) in rare cases (fixed in 115.7.0)
FIXED - Regular expression search in (non-existent) message headers delivering false positives (fixed in 115.7.0)
NEW - New preference mail.folderpane.expand_delay (fixed in 115.6.1)
NEW - Column indicators for secondary search and icon columns (fixed in 115.6.1) - Bug 323067
CHANGED - Regular expression matching in search terms now using ICU's regular expression matching rather than std::regex (fixed in 115.6.1)
CHANGED - Enhancements to the splitters in the compose window, can now all be operated via the keyboard (fixed in 115.6.1)
CHANGED - Duplicate results of global search originating from Gmail's "All Mail" folder no longer displayed in the result list (fixed in 115.6.1) - GitHub #224
FIXED - Add-on installation problem on some Linux distributions incl. the one shipping with Chrome OS (fixed in 115.6.1) - Bug 1829370
FIXED - Some issues when manually re-ordering folders of (localised) Gmail account or local trash folder (fixed in 115.6.1)
NEW - Account colours part 2 and 3: Message list (unified folders only) and Write/compose window (fixed in 115.6.0)
FIXED - Crash when entering an invalid regular expression into a filter search term (fixed in 115.6.0)
FIXED - Phantom rows and search problems relating to too many folders being searched. Should now work with up to 6144 folders. On Linux, increase ulimit -n according to the number of folders in the profile. (fixed in 115.6.0)
NEW - End-of-year Donation campaign: Betterbird will ask for a donation. This is only once per profile per year. (fixed in 115.5.2)
NEW - Account colours part 1: Account Manager and folder pane. (fixed in 115.5.2). Note: Color black (#000000) is interpreted as "no colour". The chosen colour is applied with 20% opacity.
NEW - More layouts: "Wide thread" (thread pane wide on top, folder and preview pane below), "Stacked" (folder pane and thread pane both on the left) (fixed in 115.5.2)
NEW - Attachment list on top in Write (compose) window
NEW - Make tabs session restore optional. Option to restore no tabs, system tabs or all tabs. (fixed in 115.5.2)- Bug 506526
CHANGED - Thread pane can now be collapsed to the height of one row (fixed in 115.5.2) - Bug 1855611
FIXED - Minimise to tray not working on Linux if attempted before tray icon shows for the first time (fixed in 115.5.2) - GitHub #227
NEW - Quick filter and folder search in S/MIME encrypted messages (fixed in 115.5.1)
FIXED - Global search in S/MIME encrypted messages not working (fixed in 115.5.1)
FIXED - Problem with manually sorting (ordering) IMAP folders in folder pane (fixed in 115.5.1)
FIXED - Empty "phantom" content tabs appearing after startup-up (fixed in 115.5.1)
RESTORED - Windows system notifications (fixed in 115.5.0)
NEW - Ability to manually sort (order) folders in folder pane (most of the work by the Thunderbird team, adjustments by Betterbird) (fixed in 115.5.0) - Bug 1846550, Bug 1864510, Bug 1864582
NEW - Introduced pref betterbird.update.checkIntervalDays to configure time between update checks (in days) (fixed in 115.5.0)
FIXED - Turning multi-line view on/off wasn't immediately reflected in the thread pane/message list (fixed in 115.5.0)
FIXED - Performance issue when using search/virtual folders (fixed in 115.5.0) - Bug 1864247
FIXED - Checking for add-on updates hung at "Updating add-ons" under some circumstances (fixed in 115.5.0)
FIXED - Error Console output when checking updates for add-ons not hosted on ATN (fixed in 115.4.2) - Bug 1861372
FIXED - After restart, unread/total message counts not shown for collapsed servers in the folder tree (fixed in 115.4.2) - Bug 1835548
NEW - Shift+Click on "Mark Folder Read" will also mark all sub-folders as read (fixed in 115.4.0) - Bug 500762
CHANGED - On Windows Betterbird now uses its own registry entries to better co-exist with a Thunderbird installation (fixed in 115.4.0)
FIXED - Bad X-MOZ-LASTACK attributes from iCloud CalDAV calendars not tolerated (fixed in 115.4.0) - Bug 1849849
FIXED - Couldn't open or save encrypted message attachment (fixed in 115.4.0) - Bug 1689326, Bug 1837247
NEW - Pref mail.download.open_attachments_readonly to disable that attachments are opened read-only (fixed in 115.3.2)
FIXED - Fixed broken activation when clicking system tray icon on some Linux KDE installations (fixed in 115.3.2)
CHANGED - Improved activation when clicking system tray icon on Linux Mate (fixed in 115.3.2)
NEW - "Open Link in Browser" in compose window via context menu (fixed in 115.3.1) - Bug 695142
FIXED - SMTP: Limit messages per connection with new pref mail.smtpserver.default.max_messages_per_connection (fixed in 115.3.1) - Bug 1854567
RESTORED - Menu bar at the top of the main window (not underneath the new unified toolbar)
RESTORED - Total and unread/selected count removed from status bar (further improvements in 115.1.0, GitHub #183) - Bug 1831667
RESTORED - No more connecting lines in threaded view - Bug 1829470
RESTORED - Visual feedback during Quick Filter Search - Bug 1831500
RESTORED - Broken feed functionality, a lot of breakage in Thunderbird "Supernova": Feed updates, icons, etc.
MITIGATED - Problem with restoring message and folder tabs after restart on large profiles with many calendars - Bug 1841411
NEW - Vertically aligned tabs
NEW - Attachment list on top
NEW - Header pane resize
NEW - Minimize to system tray on Linux (KDE, Gnome and Xfce desktops), improved in 115.2.1
CHANGED - Improved portable launcher. Portable installation can now be moved without loss of functionality
CHANGED - New program icons for Mac (compliant with Apple rules)
CHANGED - Tab titles restore quicker (not a fix for tab restoral problem, see above)
CHANGED - More Troubleshooting Information now also displays identity and server keys
NEW - New preference gloda.list.immediate to show the search result as list immediately without having to click "Show results as list". Values: 0: Facet view, 1: Facet view and list view, 2: List view only. - Bug 580252
FIXED better - Display/repair of some messages (incl. subject) with incorrect charset headers - Bug 1739609
FIXED - Can't drag contact on mailing list in other address book - Bug 1782397
FIXED - Invalid Atom feeds with missing title not accepted, for example German Heise c't feed

New in Betterbird 115.8.1-bb25 (14 March 2024) (Mar 15, 2024)

New in Betterbird 115.8.1-bb25 (6 March 2024) (Mar 7, 2024)

New in Betterbird 115.8.1-bb25 (5 March 2024) (Mar 6, 2024)

Fixed in this version:
NEW - Editing of message headers. The Edit Headers menu item is found in the message toolbar More Actions menu. By default the message subject is editable, use pref mail.messageEditor.editableHeaders to allow for more headers.
NEW - Message rethreading via drag & drop or the keyboard. See this paragraph for details.
FIXED - The additional total count in the status bar not always updating when a folder is entered or threads are collapsed or expanded
FIXED - Issue when using Quick Filter Bar with untagged messages (was broken in 115.8.0)
Fixed in Betterbird, not fixed in Thunderbird 115.8.1 yet:
Fixes provided by the Betterbird project and integrated into Thunderbird to be released later
FIXED - A sound was sometimes played for new feed messages even if disabled with pref mail.feed.play_sound. New prefs mail.feed.play_sound.type and mail.feed.play_sound.url to configure feed notification sounds if desired (fixed in 115.6.1) - Bug 1871493
Various minor fixes that Thunderbird isn't shipping yet:
FIXED - Wrong counts in Group-By-Sort headers (and related issues) - Bug 646168 Bug 1866951 Bug 1873353
Other: Bug 522768 Bug 531319 Bug 956446 Bug 1368011 Bug 1427546 Bug 1678057 Bug 1799368 Bug 1811214 Bug 1812726 Bug 1823024 Bug 1837152 Bug 1843221 Bug 1851975 Bug 1859271 Bug 1861200 Bug 1862519 Bug 1862521 Bug 1862978 Bug 1863820 Bug 1864924 Bug 1865598 Bug 1867091 Bug 1868094 Bug 1868718 Bug 1870873 Bug 1873282 Bug 1873313 Bug 1873607 Bug 1875577 Bug 1876431 Bug 1876662 Bug 1877774 Bug 1877962 Bug 1878543 Bug 1879735 Bug 1880043 Bug 1881124
Features and fixes exclusive to Betterbird (new in the 115 series):
NEW - Preference mail.threadpane.full_row_color to fully colour rows in multi-folder views (fixed in 115.8.0)
FIXED - Some glitches with the arrow alignment in the correspondents column in multi-line view (fixed in 115.8.0)
CHANGED - Row height in compact density increased by 10% (from 18 px to 20 px) in thread pane, folder pane, address book and account manager (fixed in 115.8.0)
FIXED - Linux-only: Crash on Gnome when using Wayland related to system tray notifications (fixed in 115.8.0) - GitHub #266
WITHDRAWN - Quick filter tag bar doesn't refresh when other quick filter conditions change (only in 115.8.0) - Bug 1830439
FIXED - Some issues when editing plaintext quotes, mostly disappearing empty lines. Improves rewrap somewhat. (fixed in 115.8.0) - Bug 1787577 Bug 1851951
FIXED - Some unneeded logging to the Error Console (fixed in 115.8.0)
CHANGED - When folder had manually reordered subfolders, new subfolders were added at the end. Now they are added semi-alphabetically. (fixed in 115.7.0)
CHANGED - The total count in the status bar will now show an additional lesser second count if threads are hidden or collapsed (fixed in 115.7.0)
CHANGED - Default column order: Unread indicator column now precedes subject column (fixed in 115.7.0)
CHANGED - Complex search terms: Disallow group start immediately following group start (fixed in 115.7.0) - GitHub #256
FIXED - Console errors related to Apple's CalDAV property X-APPLE-STRUCTURED-LOCATION (fixed in 115.7.0)
FIXED - Attached images not reliably scaled when attachments viewed inline (fixed in 115.7.0) - Bug 1875325
FIXED - Left-over temporary directories pid-NNNN and other temporary files (fixed in 115.7.0) - Bug 1873950
FIXED - "Open Link in Browser" in compose window via context menu not reliable (fixed in 115.7.0) - Bug 695142
FIXED - Wrong folder sometimes briefly displayed at startup impacting performance (fixed in 115.7.0) - Bug 1874557
FIXED - Incorrect total new message count in system tray tooltip and Windows taskbar badge (inconsistent with sum of folder counts) in rare cases (fixed in 115.7.0)
FIXED - Regular expression search in (non-existent) message headers delivering false positives (fixed in 115.7.0)
NEW - New preference mail.folderpane.expand_delay (fixed in 115.6.1)
NEW - Column indicators for secondary search and icon columns (fixed in 115.6.1) - Bug 323067
CHANGED - Regular expression matching in search terms now using ICU's regular expression matching rather than std::regex (fixed in 115.6.1)
CHANGED - Enhancements to the splitters in the compose window, can now all be operated via the keyboard (fixed in 115.6.1)
CHANGED - Duplicate results of global search originating from Gmail's "All Mail" folder no longer displayed in the result list (fixed in 115.6.1) - GitHub #224
FIXED - Add-on installation problem on some Linux distributions incl. the one shipping with Chrome OS (fixed in 115.6.1) - Bug 1829370
FIXED - Some issues when manually re-ordering folders of (localised) Gmail account or local trash folder (fixed in 115.6.1)
NEW - Account colours part 2 and 3: Message list (unified folders only) and Write/compose window (fixed in 115.6.0)
FIXED - Crash when entering an invalid regular expression into a filter search term (fixed in 115.6.0)
FIXED - Phantom rows and search problems relating to too many folders being searched. Should now work with up to 6144 folders. On Linux, increase ulimit -n according to the number of folders in the profile. (fixed in 115.6.0)
NEW - End-of-year Donation campaign: Betterbird will ask for a donation. This is only once per profile per year. (fixed in 115.5.2)
NEW - Account colours part 1: Account Manager and folder pane. (fixed in 115.5.2). Note: Color black (#000000) is interpreted as "no colour". The chosen colour is applied with 20% opacity.
NEW - More layouts: "Wide thread" (thread pane wide on top, folder and preview pane below), "Stacked" (folder pane and thread pane both on the left) (fixed in 115.5.2)
NEW - Attachment list on top in Write (compose) window
NEW - Make tabs session restore optional. Option to restore no tabs, system tabs or all tabs. (fixed in 115.5.2)- Bug 506526
CHANGED - Thread pane can now be collapsed to the height of one row (fixed in 115.5.2) - Bug 1855611
FIXED - Minimise to tray not working on Linux if attempted before tray icon shows for the first time (fixed in 115.5.2) - GitHub #227
NEW - Quick filter and folder search in S/MIME encrypted messages (fixed in 115.5.1)
FIXED - Global search in S/MIME encrypted messages not working (fixed in 115.5.1)
FIXED - Problem with manually sorting (ordering) IMAP folders in folder pane (fixed in 115.5.1)
FIXED - Empty "phantom" content tabs appearing after startup-up (fixed in 115.5.1)
RESTORED - Windows system notifications (fixed in 115.5.0)
NEW - Ability to manually sort (order) folders in folder pane (most of the work by the Thunderbird team, adjustments by Betterbird) (fixed in 115.5.0) - Bug 1846550, Bug 1864510, Bug 1864582
NEW - Introduced pref betterbird.update.checkIntervalDays to configure time between update checks (in days) (fixed in 115.5.0)
FIXED - Turning multi-line view on/off wasn't immediately reflected in the thread pane/message list (fixed in 115.5.0)
FIXED - Performance issue when using search/virtual folders (fixed in 115.5.0) - Bug 1864247
FIXED - Checking for add-on updates hung at "Updating add-ons" under some circumstances (fixed in 115.5.0)
FIXED - Error Console output when checking updates for add-ons not hosted on ATN (fixed in 115.4.2) - Bug 1861372
FIXED - After restart, unread/total message counts not shown for collapsed servers in the folder tree (fixed in 115.4.2) - Bug 1835548
NEW - Shift+Click on "Mark Folder Read" will also mark all sub-folders as read (fixed in 115.4.0) - Bug 500762
CHANGED - On Windows Betterbird now uses its own registry entries to better co-exist with a Thunderbird installation (fixed in 115.4.0)
FIXED - Bad X-MOZ-LASTACK attributes from iCloud CalDAV calendars not tolerated (fixed in 115.4.0) - Bug 1849849
FIXED - Couldn't open or save encrypted message attachment (fixed in 115.4.0) - Bug 1689326, Bug 1837247
NEW - Pref mail.download.open_attachments_readonly to disable that attachments are opened read-only (fixed in 115.3.2)
FIXED - Undo/Redo not working on stand-alone message window (fixed in 115.3.2) - Bug 1855643
FIXED - Fixed broken activation when clicking system tray icon on some Linux KDE installations (fixed in 115.3.2)
CHANGED - Improved activation when clicking system tray icon on Linux Mate (fixed in 115.3.2)
NEW - "Open Link in Browser" in compose window via context menu (fixed in 115.3.1) - Bug 695142
FIXED - SMTP: Limit messages per connection with new pref mail.smtpserver.default.max_messages_per_connection (fixed in 115.3.1) - Bug 1854567
RESTORED - Menu bar at the top of the main window (not underneath the new unified toolbar)
RESTORED - Total and unread/selected count removed from status bar (further improvements in 115.1.0, GitHub #183) - Bug 1831667
RESTORED - No more connecting lines in threaded view - Bug 1829470
RESTORED - Visual feedback during Quick Filter Search - Bug 1831500
RESTORED - Broken feed functionality, a lot of breakage in Thunderbird "Supernova": Feed updates, icons, etc.
MITIGATED - Problem with restoring message and folder tabs after restart on large profiles with many calendars - Bug 1841411
NEW - Vertically aligned tabs
NEW - Attachment list on top
NEW - Header pane resize
NEW - Minimize to system tray on Linux (KDE, Gnome and Xfce desktops), improved in 115.2.1
CHANGED - Improved portable launcher. Portable installation can now be moved without loss of functionality
CHANGED - New program icons for Mac (compliant with Apple rules)
CHANGED - Tab titles restore quicker (not a fix for tab restoral problem, see above)
CHANGED - More Troubleshooting Information now also displays identity and server keys
NEW - New preference gloda.list.immediate to show the search result as list immediately without having to click "Show results as list". Values: 0: Facet view, 1: Facet view and list view, 2: List view only. - Bug 580252
FIXED better - Display/repair of some messages (incl. subject) with incorrect charset headers - Bug 1739609
FIXED - Can't drag contact on mailing list in other address book - Bug 1782397
FIXED - Invalid Atom feeds with missing title not accepted, for example German Heise c't feed
FIXED - Delivery status notification (DSN) request not working when "Send Later" is used - Bug 815638

New in Betterbird 115.8.0-bb24 (26 February 2024) (Feb 28, 2024)

New in Betterbird 115.8.0-bb24 (24 February 2024) (Feb 26, 2024)

New in Betterbird 115.8.0-bb24 (21 February 2024) (Feb 26, 2024)

Fixed in this version:
NEW - Preference mail.threadpane.full_row_color to fully colour rows in multi-folder views
FIXED - Some glitches with the arrow alignment in the correspondents column in multi-line view
FIXED - Slow opening saved messages (.eml files) on profiles with many folders - Bug 1863957
CHANGED - Row height in compact density increased by 10% (from 18 px to 20 px) in thread pane, folder pane, address book and account manager
FIXED - Linux-only: Crash on Gnome when using Wayland related to system tray notifications - GitHub #266
FIXED - Quick filter tag bar doesn't refresh when other quick filter conditions change - Bug 1830439
FIXED - Some issues when editing plaintext quotes, mostly disappearing empty lines. Improves rewrap somewhat. - Bug 1787577 Bug 1851951
FIXED - Some unneeded logging to the Error Console
Fixed in Betterbird, not fixed in Thunderbird 115.8.0 yet:
Fixes provided by the Betterbird project and integrated into Thunderbird to be released later
FIXED - PGP decryption sometimes restores the subject to the wrong message - Bug 1860977
FIXED - Tags added, edited or deleted not updated in the list of tags immediately (fixed in 115.7.0) - Bug 1874557
FIXED - A sound was sometimes played for new feed messages even if disabled with pref mail.feed.play_sound. New prefs mail.feed.play_sound.type and mail.feed.play_sound.url to configure feed notification sounds if desired (fixed in 115.6.1) - Bug 1871493
Various minor fixes that Thunderbird isn't shipping yet:
FIXED - Wrong counts in Group-By-Sort headers (and related issues) - Bug 646168 Bug 1866951 Bug 1873353
Other: Bug 522768 Bug 531319 Bug 1368011 Bug 1799368 Bug 1811214 Bug 1812726 Bug 1823024 Bug 1837152 Bug 1843221 Bug 1851975 Bug 1852744 Bug 1859271 Bug 1861200 Bug 1862519 Bug 1862521 Bug 1862978 Bug 1863820 Bug 1864924 Bug 1865598 Bug 1867091 Bug 1868094 Bug 1868626 Bug 1868718 Bug 1868816 Bug 1870873 Bug 1871992 Bug 1872253 Bug 1873282 Bug 1873313 Bug 1873607 Bug 1875577 Bug 1876431 Bug 1876662 Bug 1876931 Bug 1877774 Bug 1877962 Bug 1878053 Bug 1878543 Bug 1879735
Features and fixes exclusive to Betterbird (new in the 115 series):
CHANGED - When folder had manually reordered subfolders, new subfolders were added at the end. Now they are added semi-alphabetically. (fixed in 115.7.0)
CHANGED - The total count in the status bar will now show an additional lesser second count if threads are hidden or collapsed (fixed in 115.7.0)
CHANGED - Default column order: Unread indicator column now precedes subject column (fixed in 115.7.0)
CHANGED - Complex search terms: Disallow group start immediately following group start (fixed in 115.7.0) - GitHub #256
FIXED - Console errors related to Apple's CalDAV property X-APPLE-STRUCTURED-LOCATION (fixed in 115.7.0)
FIXED - Attached images not reliably scaled when attachments viewed inline (fixed in 115.7.0) - Bug 1875325
FIXED - Left-over temporary directories pid-NNNN and other temporary files (fixed in 115.7.0) - Bug 1873950
FIXED - "Open Link in Browser" in compose window via context menu not reliable (fixed in 115.7.0) - Bug 695142
FIXED - Wrong folder sometimes briefly displayed at startup impacting performance (fixed in 115.7.0) - Bug 1874557
FIXED - Incorrect total new message count in system tray tooltip and Windows taskbar badge (inconsistent with sum of folder counts) in rare cases (fixed in 115.7.0)
FIXED - Regular expression search in (non-existent) message headers delivering false positives (fixed in 115.7.0)
NEW - New preference mail.folderpane.expand_delay (fixed in 115.6.1)
NEW - Column indicators for secondary search and icon columns (fixed in 115.6.1) - Bug 323067
CHANGED - Regular expression matching in search terms now using ICU's regular expression matching rather than std::regex (fixed in 115.6.1)
CHANGED - Enhancements to the splitters in the compose window, can now all be operated via the keyboard (fixed in 115.6.1)
CHANGED - Duplicate results of global search originating from Gmail's "All Mail" folder no longer displayed in the result list (fixed in 115.6.1) - GitHub #224
FIXED - Add-on installation problem on some Linux distributions incl. the one shipping with Chrome OS (fixed in 115.6.1) - Bug 1829370
FIXED - Some issues when manually re-ordering folders of (localised) Gmail account or local trash folder (fixed in 115.6.1)
NEW - Account colours part 2 and 3: Message list (unified folders only) and Write/compose window (fixed in 115.6.0)
FIXED - Crash when entering an invalid regular expression into a filter search term (fixed in 115.6.0)
FIXED - Phantom rows and search problems relating to too many folders being searched. Should now work with up to 6144 folders. On Linux, increase ulimit -n according to the number of folders in the profile. (fixed in 115.6.0)
NEW - End-of-year Donation campaign: Betterbird will ask for a donation. This is only once per profile per year. (fixed in 115.5.2)
NEW - Account colours part 1: Account Manager and folder pane. (fixed in 115.5.2). Note: Color black (#000000) is interpreted as "no colour". The chosen colour is applied with 20% opacity.
NEW - More layouts: "Wide thread" (thread pane wide on top, folder and preview pane below), "Stacked" (folder pane and thread pane both on the left) (fixed in 115.5.2)
NEW - Attachment list on top in Write (compose) window
NEW - Make tabs session restore optional. Option to restore no tabs, system tabs or all tabs. (fixed in 115.5.2)- Bug 506526
CHANGED - Thread pane can now be collapsed to the height of one row (fixed in 115.5.2) - Bug 1855611
FIXED - Minimise to tray not working on Linux if attempted before tray icon shows for the first time (fixed in 115.5.2) - GitHub #227
NEW - Quick filter and folder search in S/MIME encrypted messages (fixed in 115.5.1)
FIXED - Global search in S/MIME encrypted messages not working (fixed in 115.5.1)
FIXED - Problem with manually sorting (ordering) IMAP folders in folder pane (fixed in 115.5.1)
FIXED - Empty "phantom" content tabs appearing after startup-up (fixed in 115.5.1)
RESTORED - Windows system notifications (fixed in 115.5.0)
NEW - Ability to manually sort (order) folders in folder pane (most of the work by the Thunderbird team, adjustments by Betterbird) (fixed in 115.5.0) - Bug 1846550, Bug 1864510, Bug 1864582
NEW - Introduced pref betterbird.update.checkIntervalDays to configure time between update checks (in days) (fixed in 115.5.0)
FIXED - Turning multi-line view on/off wasn't immediately reflected in the thread pane/message list (fixed in 115.5.0)
FIXED - Performance issue when using search/virtual folders (fixed in 115.5.0) - Bug 1864247
FIXED - Checking for add-on updates hung at "Updating add-ons" under some circumstances (fixed in 115.5.0)
FIXED - Error Console output when checking updates for add-ons not hosted on ATN (fixed in 115.4.2) - Bug 1861372
FIXED - After restart, unread/total message counts not shown for collapsed servers in the folder tree (fixed in 115.4.2) - Bug 1835548
NEW - Shift+Click on "Mark Folder Read" will also mark all sub-folders as read (fixed in 115.4.0) - Bug 500762
CHANGED - On Windows Betterbird now uses its own registry entries to better co-exist with a Thunderbird installation (fixed in 115.4.0)
FIXED - Bad X-MOZ-LASTACK attributes from iCloud CalDAV calendars not tolerated (fixed in 115.4.0) - Bug 1849849
FIXED - Couldn't open or save encrypted message attachment (fixed in 115.4.0) - Bug 1689326, Bug 1837247
NEW - Pref mail.download.open_attachments_readonly to disable that attachments are opened read-only (fixed in 115.3.2)
FIXED - Undo/Redo not working on stand-alone message window (fixed in 115.3.2) - Bug 1855643
FIXED - Fixed broken activation when clicking system tray icon on some Linux KDE installations (fixed in 115.3.2)
CHANGED - Improved activation when clicking system tray icon on Linux Mate (fixed in 115.3.2)
NEW - "Open Link in Browser" in compose window via context menu (fixed in 115.3.1) - Bug 695142
FIXED - SMTP: Limit messages per connection with new pref mail.smtpserver.default.max_messages_per_connection (fixed in 115.3.1) - Bug 1854567
RESTORED - Menu bar at the top of the main window (not underneath the new unified toolbar)
RESTORED - Total and unread/selected count removed from status bar (further improvements in 115.1.0, GitHub #183) - Bug 1831667
RESTORED - No more connecting lines in threaded view - Bug 1829470
RESTORED - Visual feedback during Quick Filter Search - Bug 1831500
RESTORED - Broken feed functionality, a lot of breakage in Thunderbird "Supernova": Feed updates, icons, etc.
MITIGATED - Problem with restoring message and folder tabs after restart on large profiles with many calendars - Bug 1841411
NEW - Vertically aligned tabs
NEW - Attachment list on top
NEW - Header pane resize
NEW - Minimize to system tray on Linux (KDE, Gnome and Xfce desktops), improved in 115.2.1
CHANGED - Improved portable launcher. Portable installation can now be moved without loss of functionality
CHANGED - New program icons for Mac (compliant with Apple rules)
CHANGED - Tab titles restore quicker (not a fix for tab restoral problem, see above)
CHANGED - More Troubleshooting Information now also displays identity and server keys
NEW - New preference gloda.list.immediate to show the search result as list immediately without having to click "Show results as list". Values: 0: Facet view, 1: Facet view and list view, 2: List view only. - Bug 580252
FIXED better - Display/repair of some messages (incl. subject) with incorrect charset headers - Bug 1739609
FIXED - Can't drag contact on mailing list in other address book - Bug 1782397
FIXED - Invalid Atom feeds with missing title not accepted, for example German Heise c't feed
FIXED - Delivery status notification (DSN) request not working when "Send Later" is used - Bug 815638

New in Betterbird 115.7.0-bb23 (23 January 2024) (Jan 23, 2024)

New in Betterbird 115.6.1-bb22 (17 January 2024) (Jan 19, 2024)

New in Betterbird 115.6.1-bb22 (11 January 2024) (Jan 13, 2024)

New in Betterbird 115.6.1-bb22 (10 January 2024) (Jan 11, 2024)

New in Betterbird 115.6.1-bb22 (08 January 2024) (Jan 8, 2024)

FIXED IN THIS VERSION:
NEW - Column indicators for secondary search and icon columns - Bug 323067
CHANGED - Regular expression matching in search terms now using ICU's regular expression matching rather than std::regex
CHANGED - Enhancements to the splitters in the compose window, can now all be operated via the keyboard
CHANGED - Duplicate results of global search originating from Gmail's "All Mail" folder no longer displayed in the result list
FIXED - A sound was sometimes played for new feed messages even if disabled with pref mail.feed.play_sound. New prefs mail.feed.play_sound.type and mail.feed.play_sound.url to configure feed notification sounds if desired - Bug 1871493
FIXED - Collapsed folders not reliably expanded when hovered during drag & drop, new pref mail.folderpane.expand_delay - Bug 1873101
FIXED - Add-on installation problem on some Linux distributions incl. the one shipping with Chrome OS - Bug 1829370
FIXED - Some issues when manually re-ordering folders of (localised) Gmail account or local trash folder
FIXED IN BETTERBIRD, NOT FIXED IN THUNDERBIRD 115.6.1 YET:
Fixes provided by the Betterbird project and integrated into Thunderbird to be released later
FIXED - After restart, unread/total message counts not shown for collapsed servers in the folder tree, now also working for favourite and unread modes (fixed in 115.5.0) - Bug 1862774
FIXED - Window/tab closed when downloading rest of POP3 message when "close on move/delete" option was selected (fixed in 115.4.2) - Bug 1861886
Various minor fixes that Thunderbird isn't shipping yet:
Bug 522768 Bug 1725127 Bug 1799362 Bug 1799368 Bug 1812726 Bug 1823024 Bug 1837152 Bug 1846054 Bug 1862519 Bug 1862521 Bug 1862978 Bug 1867407 Bug 1868079 Bug 1868094 Bug 1868718 Bug 1868816 Bug 1869557 Bug 1870641 Bug 1870720 Bug 1870809 Bug 1870817 Bug 1870873 Bug 1871992 Bug 1872253 Bug 1872632
Features and fixes exclusive to Betterbird (new in the 115 series):
NEW - Account colours part 2 and 3: Message list (unified folders only) and Write/compose window (fixed in 115.6.0)
FIXED - Crash when entering an invalid regular expression into a filter search term (fixed in 115.6.0)
FIXED - Phantom rows and search problems relating to too many folders being searched. Should now work with up to 6144 folders. On Linux, increase ulimit -n according to the number of folders in the profile. (fixed in 115.6.0)
NEW - End-of-year Donation campaign: Betterbird will ask for a donation. This is only once per profile per year. (fixed in 115.5.2)
NEW - Account colours part 1: Account Manager and folder pane. (fixed in 115.5.2). Note: Color black (#000000) is interpreted as "no colour". The chosen colour is applied with 20% opacity.
NEW - More layouts: "Wide thread" (thread pane wide on top, folder and preview pane below), "Stacked" (folder pane and thread pane both on the left) (fixed in 115.5.2)
NEW - Attachment list on top in Write (compose) window
NEW - Make tabs session restore optional. Option to restore no tabs, system tabs or all tabs. (fixed in 115.5.2)- Bug 506526
CHANGED - Thread pane can now be collapsed to the height of one row (fixed in 115.5.2) - Bug 1855611
FIXED - Minimise to tray not working on Linux if attempted before tray icon shows for the first time (fixed in 115.5.2) - GitHub #227
NEW - Quick filter and folder search in S/MIME encrypted messages (fixed in 115.5.1)
FIXED - Global search in S/MIME encrypted messages not working (fixed in 115.5.1)
FIXED - Problem with manually sorting (ordering) IMAP folders in folder pane (fixed in 115.5.1)
FIXED - Empty "phantom" content tabs appearing after startup-up (fixed in 115.5.1)
RESTORED - Windows system notifications (fixed in 115.5.0)
NEW - Ability to manually sort (order) folders in folder pane (most of the work by the Thunderbird team, adjustments by Betterbird) (fixed in 115.5.0) - Bug 1846550, Bug 1864510, Bug 1864582
NEW - Introduced pref betterbird.update.checkIntervalDays to configure time between update checks (in days) (fixed in 115.5.0)
FIXED - Turning multi-line view on/off wasn't immediately reflected in the thread pane/message list (fixed in 115.5.0)
FIXED - Performance issue when using search/virtual folders (fixed in 115.5.0) - Bug 1864247
FIXED - Checking for add-on updates hung at "Updating add-ons" under some circumstances (fixed in 115.5.0)
FIXED - Error Console output when checking updates for add-ons not hosted on ATN (fixed in 115.4.2) - Bug 1861372
FIXED - After restart, unread/total message counts not shown for collapsed servers in the folder tree (fixed in 115.4.2) - Bug 1835548
NEW - Shift+Click on "Mark Folder Read" will also mark all sub-folders as read (fixed in 115.4.0) - Bug 500762
CHANGED - On Windows Betterbird now uses its own registry entries to better co-exist with a Thunderbird installation (fixed in 115.4.0)
FIXED - Bad X-MOZ-LASTACK attributes from iCloud CalDAV calendars not tolerated (fixed in 115.4.0) - Bug 1849849
FIXED - Couldn't open or save encrypted message attachment (fixed in 115.4.0) - Bug 1689326, Bug 1837247
NEW - Pref mail.download.open_attachments_readonly to disable that attachments are opened read-only (fixed in 115.3.2)
FIXED - Undo/Redo not working on stand-alone message window (fixed in 115.3.2) - Bug 1855643
FIXED - Fixed broken activation when clicking system tray icon on some Linux KDE installations (fixed in 115.3.2)
CHANGED - Improved activation when clicking system tray icon on Linux Mate (fixed in 115.3.2)
NEW - "Open Link in Browser" in compose window via context menu (fixed in 115.3.1) - Bug 695142
FIXED - SMTP: Limit messages per connection with new pref mail.smtpserver.default.max_messages_per_connection (fixed in 115.3.1) - Bug 1854567
RESTORED - Menu bar at the top of the main window (not underneath the new unified toolbar)
RESTORED - Total and unread/selected count removed from status bar (further improvements in 115.1.0, GitHub #183) - Bug 1831667
RESTORED - No more connecting lines in threaded view - Bug 1829470
RESTORED - Visual feedback during Quick Filter Search - Bug 1831500
RESTORED - Broken feed functionality, a lot of breakage in Thunderbird "Supernova": Feed updates, icons, etc.
MITIGATED - Problem with restoring message and folder tabs after restart on large profiles with many calendars - Bug 1841411
NEW - Vertically aligned tabs
NEW - Attachment list on top
NEW - Header pane resize
NEW - Minimize to system tray on Linux (KDE, Gnome and Xfce desktops), improved in 115.2.1
CHANGED - Improved portable launcher. Portable installation can now be moved without loss of functionality
CHANGED - New program icons for Mac (compliant with Apple rules)
CHANGED - Tab titles restore quicker (not a fix for tab restoral problem, see above)
CHANGED - More Troubleshooting Information now also displays identity and server keys
NEW - New preference gloda.list.immediate to show the search result as list immediately without having to click "Show results as list". Values: 0: Facet view, 1: Facet view and list view, 2: List view only. - Bug 580252
FIXED - Can't cancel sending message - Bug 1816540
FIXED better - Display/repair of some messages (incl. subject) with incorrect charset headers - Bug 1739609
FIXED - Can't drag contact on mailing list in other address book - Bug 1782397
FIXED - Invalid Atom feeds with missing title not accepted, for example German Heise c't feed
FIXED - Delivery status notification (DSN) request not working when "Send Later" is used - Bug 815638

New in Betterbird 115.6.0-bb21 (05 January 2024) (Jan 5, 2024)

New in Betterbird 115.6.0-bb21 (01 January 2024) (Jan 3, 2024)

New in Betterbird 115.6.0-bb21 (19 December 2023) (Dec 21, 2023)

Based on Thunderbird 115.6.0:
Fixed in this version:
NEW - Account colours part 2 and 3: Message list (unified folders only) and Write/compose window
FIXED - Crash when entering an invalid regular expression into a filter search term
FIXED - Phantom rows and search problems relating to too many folders being searched. Should now work with up to 6144 folders. On Linux, increase ulimit -n according to the number of folders in the profile.
Fixed in Betterbird, not fixed in Thunderbird 115.6.0 yet:
Fixes provided by the Betterbird project and integrated into Thunderbird to be released later
FIXED - After restart, unread/total message counts not shown for collapsed servers in the folder tree, now also working for favourite and unread modes (fixed in 115.5.0) - Bug 1862774
FIXED - Window/tab closed when downloading rest of POP3 message when "close on move/delete" option was selected (fixed in 115.4.2) - Bug 1861886
Various minor fixes that Thunderbird isn't shipping yet:
Bug 522768 Bug 1799368 Bug 1812726 Bug 1823024 Bug 1837152 Bug 1846054 Bug 1862519 Bug 1862521 Bug 1864338 Bug 1866819 Bug 1867407 Bug 1867532 Bug 1868079 Bug 1868474 Bug 1868718 Bug 1868794 Bug 1868974 Bug 1869557 Bug 1870817
Features and fixes exclusive to Betterbird (new in the 115 series):
NEW - End-of-year Donation campaign: Betterbird will ask for a donation. This is only once per profile per year. (fixed in 115.5.2)
NEW - Account colours part 1: Account Manager and folder pane. (fixed in 115.5.2). Note: Color black (#000000) is interpreted as "no colour". The chosen colour is applied with 20% opacity.
NEW - More layouts: "Wide thread" (thread pane wide on top, folder and preview pane below), "Stacked" (folder pane and thread pane both on the left) (fixed in 115.5.2)
NEW - Attachment list on top in Write (compose) window
NEW - Make tabs session restore optional. Option to restore no tabs, system tabs or all tabs. (fixed in 115.5.2)- Bug 506526
CHANGED - Thread pane can now be collapsed to the height of one row (fixed in 115.5.2) - Bug 1855611
FIXED - Minimise to tray not working on Linux if attempted before tray icon shows for the first time (fixed in 115.5.2) - GitHub #227
NEW - Quick filter and folder search in S/MIME encrypted messages (fixed in 115.5.1)
FIXED - Global search in S/MIME encrypted messages not working (fixed in 115.5.1)
FIXED - Problem with manually sorting (ordering) IMAP folders in folder pane (fixed in 115.5.1)
FIXED - Empty "phantom" content tabs appearing after startup-up (fixed in 115.5.1)
RESTORED - Windows system notifications (fixed in 115.5.0)
NEW - Ability to manually sort (order) folders in folder pane (most of the work by the Thunderbird team, adjustments by Betterbird) (fixed in 115.5.0) - Bug 1846550, Bug 1864510, Bug 1864582
NEW - Introduced pref betterbird.update.checkIntervalDays to configure time between update checks (in days) (fixed in 115.5.0)
FIXED - Turning multi-line view on/off wasn't immediately reflected in the thread pane/message list (fixed in 115.5.0)
FIXED - Performance issue when using search/virtual folders (fixed in 115.5.0) - Bug 1864247
FIXED - Checking for add-on updates hung at "Updating add-ons" under some circumstances (fixed in 115.5.0)
FIXED - Error Console output when checking updates for add-ons not hosted on ATN (fixed in 115.4.2) - Bug 1861372
FIXED - After restart, unread/total message counts not shown for collapsed servers in the folder tree (fixed in 115.4.2) - Bug 1835548
NEW - Shift+Click on "Mark Folder Read" will also mark all sub-folders as read (fixed in 115.4.0) - Bug 500762
CHANGED - On Windows Betterbird now uses its own registry entries to better co-exist with a Thunderbird installation (fixed in 115.4.0)
FIXED - Bad X-MOZ-LASTACK attributes from iCloud CalDAV calendars not tolerated (fixed in 115.4.0) - Bug 1849849
FIXED - Couldn't open or save encrypted message attachment (fixed in 115.4.0) - Bug 1689326, Bug 1837247
NEW - Pref mail.download.open_attachments_readonly to disable that attachments are opened read-only (fixed in 115.3.2)
FIXED - Undo/Redo not working on stand-alone message window (fixed in 115.3.2) - Bug 1855643
FIXED - Fixed broken activation when clicking system tray icon on some Linux KDE installations (fixed in 115.3.2)
CHANGED - Improved activation when clicking system tray icon on Linux Mate (fixed in 115.3.2)
NEW - "Open Link in Browser" in compose window via context menu (fixed in 115.3.1) - Bug 695142
FIXED - SMTP: Limit messages per connection with new pref mail.smtpserver.default.max_messages_per_connection (fixed in 115.3.1) - Bug 1854567
RESTORED - Menu bar at the top of the main window (not underneath the new unified toolbar)
RESTORED - Total and unread/selected count removed from status bar (further improvements in 115.1.0, GitHub #183) - Bug 1831667
RESTORED - No more connecting lines in threaded view - Bug 1829470
RESTORED - Visual feedback during Quick Filter Search - Bug 1831500
RESTORED - Broken feed functionality, a lot of breakage in Thunderbird "Supernova": Feed updates, icons, etc.
MITIGATED - Problem with restoring message and folder tabs after restart on large profiles with many calendars - Bug 1841411
NEW - Vertically aligned tabs
NEW - Attachment list on top
NEW - Header pane resize
NEW - Minimize to system tray on Linux (KDE, Gnome and Xfce desktops), improved in 115.2.1
CHANGED - Improved portable launcher. Portable installation can now be moved without loss of functionality
CHANGED - New program icons for Mac (compliant with Apple rules)
CHANGED - Tab titles restore quicker (not a fix for tab restoral problem, see above)
CHANGED - More Troubleshooting Information now also displays identity and server keys
NEW - New preference gloda.list.immediate to show the search result as list immediately without having to click "Show results as list". Values: 0: Facet view, 1: Facet view and list view, 2: List view only. - Bug 580252
FIXED - Can't cancel sending message - Bug 1816540
FIXED better - Display/repair of some messages (incl. subject) with incorrect charset headers - Bug 1739609
FIXED - Can't drag contact on mailing list in other address book - Bug 1782397
FIXED - Invalid Atom feeds with missing title not accepted, for example German Heise c't feed
FIXED - Delivery status notification (DSN) request not working when "Send Later" is used - Bug 815638

New in Betterbird 115.5.2-bb20 (13 December 2023) (Dec 15, 2023)

New in Betterbird 115.5.1-bb19 Build 2 (4 December 2023) (Dec 6, 2023)

New in Betterbird 115.5.1-bb19 Build 2 (27 November 2023) (Dec 2, 2023)

New in Betterbird 115.5.0-bb18 (26 November 2023) (Nov 27, 2023)

New in Betterbird 115.5.0-bb18 (21 November 2023) (Nov 23, 2023)

Fixed in this version:
RESTORED - Windows system notifications
NEW - Ability to manually sort (order) folders in folder pane (most of the work by the Thunderbird team, adjustments by Betterbird) - Bug 1846550, Bug 1864510, Bug 1864582
NEW - Introduced pref betterbird.update.checkIntervalDays to configure time between update checks (in days).
FIXED - Turning multi-line view on/off wasn't immediately reflected in the thread pane/message list
FIXED - After restart, unread/total message counts not shown for collapsed servers in the folder tree, now also working for favourite and unread modes - Bug 1835548
FIXED - Performance issue when using search/virtual folders - Bug 1864247
FIXED - Very busy status bar - Bug 1864776
FIXED - Checking for add-on updates hung at "Updating add-ons" under some circumstances
Fixed in Betterbird, not fixed in Thunderbird 115.5.0 yet:
Fixes provided by the Betterbird project and integrated into Thunderbird to be released later
FIXED - Saving draft/template didn't respect the original storage location in a subfolder - Bug 263114
FIXED - Status feedback when loading messages and downloading IMAP messages - Bug 1832149
FIXED - Unwanted security prompt when image was copied from message display - Bug 1862674
Various minor fixes that Thunderbird isn't shipping yet:
Bug 519687, Bug 1827973, Bug 1837152, Bug 1840500, Bug 1842420, Bug 1846127, Bug 1852428, Bug 1855758, Bug 1858461, Bug 1858629, Bug 1860322, Bug 1862232, Bug 1862247, Bug 1862519, Bug 1862521, Bug 1863449, Bug 1864124, Bug 1864338, Bug 1864339, Bug 1864352
Features and fixes exclusive to Betterbird (new in the 115 series):
FIXED - Error Console output when checking updates for add-ons not hosted on ATN (fixed in 115.4.2) - Bug 1861372
FIXED - Window/tab closed when downloading rest of POP3 message when "close on move/delete" option was selected (fixed in 115.4.2) - Bug 1861886
FIXED - After restart, unread/total message counts not shown for collapsed servers in the folder tree (fixed in 115.4.2) - Bug 1835548
NEW - Shift+Click on "Mark Folder Read" will also mark all sub-folders as read (fixed in 115.4.0) - Bug 500762
CHANGED - On Windows Betterbird now uses its own registry entries to better co-exist with a Thunderbird installation (fixed in 115.4.0)
FIXED - Bad X-MOZ-LASTACK attributes from iCloud CalDAV calendars not tolerated (fixed in 115.4.0) - Bug 1849849
FIXED - Couldn't open or save encrypted message attachment (fixed in 115.4.0) - Bug 1689326, Bug 1837247
NEW - Pref mail.download.open_attachments_readonly to disable that attachments are opened read-only (fixed in 115.3.2)
FIXED - Undo/Redo not working on stand-alone message window (fixed in 115.3.2) - Bug 1855643
FIXED - Undoing deletion of local messages needed two undo actions (fixed in 115.3.2) - Bug 1856427
FIXED - Fixed broken activation when clicking system tray icon on some Linux KDE installations (fixed in 115.3.2)
CHANGED - Improved activation when clicking system tray icon on Linux Mate (fixed in 115.3.2)
NEW - "Open Link in Browser" in compose window via context menu (fixed in 115.3.1) - Bug 695142
FIXED - SMTP: Limit messages per connection with new pref mail.smtpserver.default.max_messages_per_connection (fixed in 115.3.1) - Bug 1854567
RESTORED - Menu bar at the top of the main window (not underneath the new unified toolbar)
RESTORED - Total and unread/selected count removed from status bar (further improvements in 115.1.0, GitHub #183) - Bug 1831667
RESTORED - No more connecting lines in threaded view - Bug 1829470
RESTORED - Visual feedback during Quick Filter Search - Bug 1831500
RESTORED - Broken feed functionality, a lot of breakage in Thunderbird "Supernova": Feed updates, icons, etc.
MITIGATED - Problem with restoring message and folder tabs after restart on large profiles with many calendars - Bug 1841411
NEW - Vertically aligned tabs
NEW - Attachment list on top
NEW - Header pane resize
NEW - Minimize to system tray on Linux (KDE, Gnome and Xfce desktops), improved in 115.2.1
CHANGED - Improved portable launcher. Portable installation can now be moved without loss of functionality
CHANGED - New program icons for Mac (compliant with Apple rules)
CHANGED - Tab titles restore quicker (not a fix for tab restoral problem, see above)
CHANGED - More Troubleshooting Information now also displays identity and server keys
NEW - New preference gloda.list.immediate to show the search result as list immediately without having to click "Show results as list". Values: 0: Facet view, 1: Facet view and list view, 2: List view only. - Bug 580252
FIXED - Can't cancel sending message - Bug 1816540
FIXED better - Display/repair of some messages (incl. subject) with incorrect charset headers - Bug 1739609
FIXED - Can't drag contact on mailing list in other address book - Bug 1782397
FIXED - Invalid Atom feeds with missing title not accepted, for example German Heise c't feed
FIXED - Delivery status notification (DSN) request not working when "Send Later" is used - Bug 815638

New in Betterbird 115.4.2-bb17 (14 November 2023) (Nov 15, 2023)

New in Betterbird 115.4.2-bb17 (11 November 2023) (Nov 13, 2023)

New in Betterbird 115.4.2-bb17 (7 November 2023) (Nov 8, 2023)

FIXED IN THIS VERSION:
FIXED - Icons of context menu on Get Messages button - Bug 1837152
FIXED - Error Console output when checking updates for add-ons not hosted on ATN - Bug 1861372
FIXED - Window/tab closed when downloading rest of POP3 message when "close on move/delete" option was selected - Bug 1861886
FIXED - Unwanted security prompt when image was copied from message display - Bug 1862674
FIXED - After restart, unread/total message counts not shown for collapsed servers in the folder tree - Bug 1835548
Various minor fixes that Thunderbird isn't shipping yet:
Bug 519687, Bug 1827042, Bug 1827973, Bug 1837152, Bug 1840500, Bug 1841256, Bug 1842420, Bug 1845391, Bug 1847792, Bug 1852849, Bug 1855758, Bug 1856266, Bug 1858114, Bug 1858461, Bug 1858733, Bug 1859050, Bug 1859938, Bug 1860322, Bug 1860539, Bug 1861355, Bug 1862232, Bug 1862519, Bug 1862521
Features and fixes exclusive to Betterbird (new in the 115 series):
NEW - Shift+Click on "Mark Folder Read" will also mark all sub-folders as read (fixed in 115.4.0) - Bug 500762
CHANGED - On Windows Betterbird now uses its own registry entries to better co-exist with a Thunderbird installation (fixed in 115.4.0)
FIXED - Bad X-MOZ-LASTACK attributes from iCloud CalDAV calendars not tolerated (fixed in 115.4.0) - Bug 1849849
FIXED - Couldn't open or save encrypted message attachment (fixed in 115.4.0) - Bug 1689326, Bug 1837247
NEW - Pref mail.download.open_attachments_readonly to disable that attachments are opened read-only (fixed in 115.3.2)
FIXED - Undo/Redo not working on stand-alone message window (fixed in 115.3.2) - Bug 1855643
FIXED - Account creation wizard for news and movemail account didn't show "Finish" button (fixed in 115.3.2) - Bug 1855807
FIXED - Undoing deletion of local messages needed two undo actions (fixed in 115.3.2) - Bug 1856427
FIXED - Fixed broken activation when clicking system tray icon on some Linux KDE installations (fixed in 115.3.2)
CHANGED - Improved activation when clicking system tray icon on Linux Mate (fixed in 115.3.2)
NEW - "Open Link in Browser" in compose window via context menu (fixed in 115.3.1) - Bug 695142
FIXED - SMTP: Limit messages per connection with new pref mail.smtpserver.default.max_messages_per_connection (fixed in 115.3.1) - Bug 1854567
RESTORED - Menu bar at the top of the main window (not underneath the new unified toolbar)
RESTORED - Total and unread/selected count removed from status bar (further improvements in 115.1.0, GitHub #183) - Bug 1831667
RESTORED - No more connecting lines in threaded view - Bug 1829470
RESTORED - Visual feedback during Quick Filter Search - Bug 1831500
RESTORED - Broken feed functionality, a lot of breakage in Thunderbird "Supernova": Feed updates, icons, etc.
MITIGATED - Problem with restoring message and folder tabs after restart on large profiles with many calendars - Bug 1841411
NEW - Vertically aligned tabs
NEW - Attachment list on top
NEW - Header pane resize
NEW - Minimize to system tray on Linux (KDE, Gnome and Xfce desktops), improved in 115.2.1
CHANGED - Improved portable launcher. Portable installation can now be moved without loss of functionality
CHANGED - New program icons for Mac (compliant with Apple rules)
CHANGED - Tab titles restore quicker (not a fix for tab restoral problem, see above)
CHANGED - More Troubleshooting Information now also displays identity and server keys
NEW - New preference gloda.list.immediate to show the search result as list immediately without having to click "Show results as list". Values: 0: Facet view, 1: Facet view and list view, 2: List view only. - Bug 580252
FIXED - Dummy rows in grouped view contained artefacts from other rows - Bug 1839035
FIXED - Format incorrect when replying with selection to non-flowed plain text message - Bug 1839226
FIXED - Can't cancel sending message - Bug 1816540
FIXED better - Display/repair of some messages (incl. subject) with incorrect charset headers - Bug 1739609
FIXED - Can't drag contact on mailing list in other address book - Bug 1782397
FIXED - Support for FQDN in message IDs (don't know that that is? Don't worry about it) - Bug 1846837
FIXED - Problems with long attachment names - Bug 1827882
FIXED - Invalid Atom feeds with missing title not accepted, for example German Heise c't feed
FIXED - Status feedback when loading messages and downloading IMAP messages - Bug 1832149
FIXED - Thread collapsed/expanded status not restored of folder "grouped by sort", thread not opened to selection - Bug 1807063
FIXED - Saving draft/template didn't respect the original storage location in a subfolder - Bug 263114
FIXED - Delivery status notification (DSN) request not working when "Send Later" is used - Bug 815638

New in Betterbird 115.4.0-bb16 (28 October 2023) (Oct 29, 2023)

New in Betterbird 115.4.0-bb16 (24 October 2023) (Oct 25, 2023)

FIXED IN THIS VERSION:
NEW - Shift+Click on "Mark Folder Read" will also mark all sub-folders as read - Bug 500762
CHANGED - On Windows Betterbird now uses its own registry entries to better co-exist with a Thunderbird installation
FIXED - Previous Mail View not restored when folder is re-entered - Bug 1838589
FIXED - Bad X-MOZ-LASTACK attributes from iCloud CalDAV calendars not tolerated - Bug 1849849
FIXED - Couldn't open or save encrypted message attachment - Bug 1689326, Bug 1837247
VARIOUS MINOR FIXES THAT THUNDERBIRD ISN'T SHIPPED YET:
Bug 1827973, Bug 1837152, Bug 1840500, Bug 1852849, Bug 1855758, Bug 1857033, Bug 1858114, Bug 1858395, Bug 1858461, Bug 1858750, Bug 1859050, Bug 1859938, Bug 1860503
FEATURES AND FIXES EXCLUSIVE TO BETTERBIRD (NEW IN 115 SERIES):
NEW - Pref mail.download.open_attachments_readonly to disable that attachments are opened read-only (fixed in 115.3.2)
FIXED - Undo/Redo not working on stand-alone message window (fixed in 115.3.2) - Bug 1855643
FIXED - Account creation wizard for news and movemail account didn't show "Finish" button (fixed in 115.3.2) - Bug 1855807
FIXED - Undoing deletion of local messages needed two undo actions (fixed in 115.3.2) - Bug 1856427
FIXED - Fixed broken activation when clicking system tray icon on some Linux KDE installations (fixed in 115.3.2)
CHANGED - Improved activation when clicking system tray icon on Linux Mate (fixed in 115.3.2)
NEW - "Open Link in Browser" in compose window via context menu (fixed in 115.3.1) - Bug 695142
FIXED - SMTP: Limit messages per connection with new pref mail.smtpserver.default.max_messages_per_connection (fixed in 115.3.1) - Bug 1854567
RESTORED - Menu bar at the top of the main window (not underneath the new unified toolbar)
RESTORED - Total and unread/selected count removed from status bar (further improvements in 115.1.0, GitHub #183) - Bug 1831667
RESTORED - No more connecting lines in threaded view - Bug 1829470
RESTORED - Visual feedback during Quick Filter Search - Bug 1831500
RESTORED - Broken feed functionality, a lot of breakage in Thunderbird "Supernova": Feed updates, icons, etc.
MITIGATED - Problem with restoring message and folder tabs after restart on large profiles with many calendars - Bug 1841411
NEW - Vertically aligned tabs
NEW - Attachment list on top
NEW - Header pane resize
NEW - Minimize to system tray on Linux (KDE, Gnome and Xfce desktops), improved in 115.2.1
CHANGED - Improved portable launcher. Portable installation can now be moved without loss of functionality
CHANGED - New program icons for Mac (compliant with Apple rules)
CHANGED - Tab titles restore quicker (not a fix for tab restoral problem, see above)
CHANGED - More Troubleshooting Information now also displays identity and server keys
NEW - New preference gloda.list.immediate to show the search result as list immediately without having to click "Show results as list". Values: 0: Facet view, 1: Facet view and list view, 2: List view only. - Bug 580252
FIXED - Dummy rows in grouped view contained artefacts from other rows - Bug 1839035
FIXED - Format incorrect when replying with selection to non-flowed plain text message - Bug 1839226
FIXED - Can't cancel sending message - Bug 1816540
FIXED better - Display/repair of some messages (incl. subject) with incorrect charset headers - Bug 1739609
FIXED - Can't drag contact on mailing list in other address book - Bug 1782397
FIXED - Support for FQDN in message IDs (don't know that that is? Don't worry about it) - Bug 1846837
FIXED - Problems with long attachment names - Bug 1827882
FIXED - Invalid Atom feeds with missing title not accepted, for example German Heise c't feed
FIXED - Status feedback when loading messages and downloading IMAP messages - Bug 1832149
FIXED - Thread collapsed/expanded status not restored of folder "grouped by sort", thread not opened to selection - Bug 1807063
FIXED - Saving draft/template didn't respect the original storage location in a subfolder - Bug 263114
FIXED - Delivery status notification (DSN) request not working when "Send Later" is used - Bug 815638

New in Betterbird 115.3.2-bb15 (10 October 2023) (Oct 11, 2023)

Based on Thunderbird 115.3.2:
Betterbird 115 offers all the features and bug fixes mentioned on the feature table on the home page: Multi-line view, complex search terms, regular expression search, search in encrypted messages, improved Windows and Linux system tray integration, and many more. Check the release notes of the 102 series for features added before the 115 series.
Fixed in this version:
NEW - Pref mail.download.open_attachments_readonly to disable that attachments are opened read-only
FIXED - "Move to folder again" function sometimes not working - Bug 1856712
FIXED - Undo/Redo not working on stand-alone message window - Bug 1855643
FIXED - Account creation wizard for news and movemail account didn't show "Finish" button - Bug 1855807
FIXED - Undoing deletion of local messages needed two undo actions - Bug 1856427
FIXED - Fixed broken activation when clicking system tray icon on some Linux KDE installations
CHANGED - Improved activation when clicking system tray icon on Linux Mate
Fixed in Betterbird, not fixed in Thunderbird 115.3.2 yet:
Fixes provided by the Betterbird project and integrated into Thunderbird to be released later
FIXED - Show all headers not working in stand-alone message window - Bug 1855316
FIXED - From field made editable when switching identities under certain circumstances - Bug 1850055
Various minor fixes that Thunderbird isn't shipping yet:
Bug 1836735, Bug 1837152, Bug 1840500, Bug 1843979, Bug 1847791, Bug 1851971, Bug 1852849, Bug 1853428, Bug 1853558, Bug 1854035, Bug 1855065, Bug 1856315, Bug 1857196, Bug 1857471, Bug 1857541
Features and fixes exclusive to Betterbird (new in the 115 series):
NEW - "Open Link in Browser" in compose window via context menu (fixed in 115.3.1) - Bug 695142
FIXED - SMTP: Limit messages per connection with new pref mail.smtpserver.default.max_messages_per_connection (fixed in 115.3.1) - Bug 1854567
RESTORED - Menu bar at the top of the main window (not underneath the new unified toolbar)
RESTORED - Total and unread/selected count removed from status bar (further improvements in 115.1.0, GitHub #183) - Bug 1831667
RESTORED - No more connecting lines in threaded view - Bug 1829470
RESTORED - Visual feedback during Quick Filter Search - Bug 1831500
RESTORED - Broken feed functionality, a lot of breakage in Thunderbird "Supernova": Feed updates, icons, etc.
MITIGATED - Problem with restoring message and folder tabs after restart on large profiles with many calendars - Bug 1841411
NEW - Vertically aligned tabs
NEW - Attachment list on top
NEW - Header pane resize
NEW - Minimize to system tray on Linux (KDE, Gnome and Xfce desktops), improved in 115.2.1
CHANGED - Improved portable launcher. Portable installation can now be moved without loss of functionality
CHANGED - New program icons for Mac (compliant with Apple rules)
CHANGED - Tab titles restore quicker (not a fix for tab restoral problem, see above)
CHANGED - More Troubleshooting Information now also displays identity and server keys
NEW - New preference gloda.list.immediate to show the search result as list immediately without having to click "Show results as list". Values: 0: Facet view, 1: Facet view and list view, 2: List view only. - Bug 580252
FIXED - Dummy rows in grouped view contained artefacts from other rows - Bug 1839035
FIXED - Format incorrect when replying with selection to non-flowed plain text message - Bug 1839226
FIXED - Can't cancel sending message - Bug 1816540
FIXED better - Display/repair of some messages (incl. subject) with incorrect charset headers - Bug 1739609
FIXED - Can't drag contact on mailing list in other address book - Bug 1782397
FIXED - Support for FQDN in message IDs (don't know that that is? Don't worry about it) - Bug 1846837
FIXED - Problems with long attachment names - Bug 1827882
FIXED - Invalid Atom feeds with missing title not accepted, for example German Heise c't feed
FIXED - Status feedback when loading messages and downloading IMAP messages - Bug 1832149
FIXED - Thread collapsed/expanded status not restored of folder "grouped by sort", thread not opened to selection - Bug 1807063
FIXED - Saving draft/template didn't respect the original storage location in a subfolder - Bug 263114
FIXED - Delivery status notification (DSN) request not working when "Send Later" is used - Bug 815638

New in Betterbird 115.3.1-bb14 (2 October 2023) (Oct 3, 2023)

New in Betterbird 115.3.1-bb14 (29 September 2023) (Oct 1, 2023)

Based on Thunderbird 115.3.1, release notes.
Betterbird 115 offers all the features and bug fixes mentioned on the feature table on the home page: Multi-line view, complex search terms, regular expression search, search in encrypted messages, improved Windows and Linux system tray integration, and many more. Check the release notes of the 102 series for features added before the 115 series.
Fixed in this version:
NEW - "Open Link in Browser" in compose window via context menu - Bug 695142
CHANGED - Improved activation when clicking system tray icon on Linux
FIXED - Show all headers not working in stand-alone message window - Bug 1855316
FIXED - SMTP: Limit messages per connection with new pref mail.smtpserver.default.max_messages_per_connection - Bug 1854567
FIXED - Movemail was not functional in the 115 series so far - apologies! Note that Movemail is NOT supported in the FlatPak build.
Fixed in Betterbird, not fixed in Thunderbird 115.3.1 yet:
Fixes provided by the Betterbird project and integrated into Thunderbird to be released later
FIXED - Reply prefix ("Re:", "RE:") not detected for news messages - Bug 1845155
FIXED - From field made editable when switching identities under certain circumstances - Bug 1850055
Various minor fixes that Thunderbird isn't shipping yet:
Bug 1836735, Bug 1840500, Bug 1847791, Bug 1854023, Bug 1854035, Bug 1854064
Features and fixes exclusive to Betterbird (new in the 115 series):
RESTORED - Menu bar at the top of the main window (not underneath the new unified toolbar)
RESTORED - Total and unread/selected count removed from status bar (further improvements in 115.1.0, GitHub #183) - Bug 1831667
RESTORED - No more connecting lines in threaded view - Bug 1829470
RESTORED - Visual feedback during Quick Filter Search - Bug 1831500
RESTORED - Broken feed functionality, a lot of breakage in Thunderbird "Supernova": Feed updates, icons, etc.
MITIGATED - Problem with restoring message and folder tabs after restart on large profiles with many calendars - Bug 1841411
NEW - Vertically aligned tabs
NEW - Attachment list on top
NEW - Header pane resize
NEW - Minimize to system tray on Linux (KDE, Gnome and Xfce desktops), improved in 115.2.1
CHANGED - Improved portable launcher. Portable installation can now be moved without loss of functionality
CHANGED - New program icons for Mac (compliant with Apple rules)
CHANGED - Tab titles restore quicker (not a fix for tab restoral problem, see above)
CHANGED - More Troubleshooting Information now also displays identity and server keys
NEW - New preference gloda.list.immediate to show the search result as list immediately without having to click "Show results as list". Values: 0: Facet view, 1: Facet view and list view, 2: List view only. - Bug 580252
FIXED - Dummy rows in grouped view contained artefacts from other rows - Bug 1839035
FIXED - Format incorrect when replying with selection to non-flowed plain text message - Bug 1839226
FIXED - Can't cancel sending message - Bug 1816540
FIXED better - Display/repair of some messages (incl. subject) with incorrect charset headers - Bug 1739609
FIXED - Can't drag contact on mailing list in other address book - Bug 1782397
FIXED - Support for FQDN in message IDs (don't know that that is? Don't worry about it) - Bug 1846837
FIXED - Problems with long attachment names - Bug 1827882
FIXED - Invalid Atom feeds with missing title not accepted, for example German Heise c't feed
FIXED - Status feedback when loading messages and downloading IMAP messages - Bug 1832149
FIXED - Thread collapsed/expanded status not restored of folder "grouped by sort", thread no opened to selection - Bug 1851320
FIXED - Saving draft/template didn't respect the original storage location in a subfolder - Bug 263114
FIXED - Delivery status notification (DSN) request not working when "Send Later" is used - Bug 815638

New in Betterbird 115.3.0-bb13 (26 September 2023) (Sep 29, 2023)

Fixed in this version:
NEW - "Open Link in Browser" in compose window via context menu - Bug 695142
CHANGED - Improved activation when clicking system tray icon on Linux
FIXED - Show all headers not working in stand-alone message window - Bug 1855316
FIXED - SMTP: Limit messages per connection with new pref mail.smtpserver.default.max_messages_per_connection - Bug 1854567
Based on Thunderbird 115.3.0, release notes:
Betterbird 115 offers all the features and bug fixes mentioned on the feature table on the home page: Multi-line view, complex search terms, regular expression search, search in encrypted messages, improved Windows and Linux system tray integration, and many more. During the preview period we're featuring improvements compared to Thunderbird 115 in the release notes.
RESTORED - Menu bar at the top of the main window (not underneath the new unified toolbar)
RESTORED - Total and unread/selected count removed from status bar (further improvements in 115.1.0, GitHub #183) - Bug 1831667
RESTORED - No more connecting lines in threaded view - Bug 1829470
RESTORED - Visual feedback during Quick Filter Search - Bug 1831500
RESTORED - Broken feed functionality, a lot of breakage in Thunderbird "Supernova": Feed updates, icons, etc.
MITIGATED - Problem with restoring message and folder tabs after restart on large profiles with many calendars - Bug 1841411
NEW - Vertically aligned tabs
NEW - Attachment list on top
NEW - Header pane resize
NEW - Minimize to system tray on Linux (KDE, Gnome and Xfce desktops), improved in 115.2.1
CHANGED - Improved portable launcher. Portable installation can now be moved without loss of functionality
CHANGED - New program icons for Mac (compliant with Apple rules)
CHANGED - Tab titles restore quicker (not a fix for tab restoral problem, see above)
CHANGED - More Troubleshooting Information now also displays identity and server keys
NEW - New preference gloda.list.immediate to show the search result as list immediately without having to click "Show results as list". Values: 0: Facet view, 1: Facet view and list view, 2: List view only. - Bug 580252
FIXED - Dummy rows in grouped view contained artefacts from other rows - Bug 1839035
FIXED - Format incorrect when replying with selection to non-flowed plain text message - Bug 1839226
FIXED - Can't cancel sending message - Bug 1816540
FIXED better - Display/repair of some messages (incl. subject) with incorrect charset headers - Bug 1739609
FIXED - Can't drag contact on mailing list in other address book - Bug 1782397
FIXED - Reply prefix ("Re:", "RE:") not detected for news messages - Bug 1845155
FIXED - Support for FQDN in message IDs (don't know that that is? Don't worry about it) - Bug 1846837
FIXED - Problems with long attachment names - Bug 1827882
FIXED - Invalid Atom feeds with missing title not accepted, for example German Heise c't feed
FIXED - From field made editable when switching identities under certain circumstances - Bug 1850055
FIXED - Status feedback when loading messages and downloading IMAP messages - Bug 1832149
FIXED - Thread collapsed/expanded status not restored of folder "grouped by sort", thread no opened to selection - Bug 1851320
FIXED - Saving draft/template didn't respect the original storage location in a subfolder - Bug 263114
FIXED - Delivery status notification (DSN) request not working when "Send Later" is used - Bug 815638
Other fixes not contained in Thunderbird 115.3.0 yet: Bug 1788534, Bug 1836735, Bug 1840500, Bug 1847791, Bug 1852525, Bug 1854035, Bug 1854064

New in Betterbird 115.3.0-bb13 Preview (26 September 2023) (Sep 27, 2023)

New in Betterbird 115.2.3-bb12 Preview (19 September 2023) (Sep 23, 2023)

Based on Thunderbird 115.2.3, release notes.
Betterbird 115 offers all the features and bug fixes mentioned on the feature table on the home page: Multi-line view, complex search terms, regular expression search, search in encrypted messages, improved Windows and Linux system tray integration, and many more. During the preview period we're featuring improvements compared to Thunderbird 115 in the release notes.
Fixed in this version:
RESTORED - Menu bar at the top of the main window (not underneath the new unified toolbar)
RESTORED - Total and unread/selected count removed from status bar (further improvements in 115.1.0, GitHub #183) - Bug 1831667
RESTORED - No more connecting lines in threaded view - Bug 1829470
RESTORED - Visual feedback during Quick Filter Search - Bug 1831500
RESTORED - Broken feed functionality, a lot of breakage in Thunderbird "Supernova": Feed updates, icons, etc.
MITIGATED - Problem with restoring message and folder tabs after restart on large profiles with many calendars - Bug 1841411
CHANGED - Reduced row height of multi-line view to follow row height of card view (changed in 115.1.0)
NEW - Vertically aligned tabs
NEW - Attachment list on top
NEW - Header pane resize
NEW - Minimize to system tray on Linux (KDE, Gnome and Xfce desktops), improved in 115.2.1
CHANGED - New program icons for Mac (compliant with Apple rules)
CHANGED - Tab titles restore quicker (not a fix for tab restoral problem, see above)
CHANGED - More Troubleshooting Information now also displays identity and server keys
NEW - New preference gloda.list.immediate to show the search result as list immediately without having to click "Show results as list". Values: 0: Facet view, 1: Facet view and list view, 2: List view only. - Bug 580252
FIXED - Dummy rows in grouped view contained artefacts from other rows - Bug 1839035
FIXED - Format incorrect when replying with selection to non-flowed plain text message - Bug 1839226
FIXED - Subject of encrypted messages not shown in message list - Bug 1843833
FIXED - Can't cancel sending message - Bug 1816540
FIXED - Display of new or unread messages in system tray not reliable
FIXED better - Display/repair of some messages (incl. subject) with incorrect charset headers - Bug 1739609
FIXED - Can't drag contact on mailing list in other address book - Bug 1782397
FIXED - Reply prefix ("Re:", "RE:") not detected for news messages - Bug 1845155
FIXED - Support for FQDN in message IDs (don't know that that is? Don't worry about it) - Bug 1846837
FIXED - Problems with long attachment names - Bug 1827882
FIXED - Invalid Atom feeds with missing title not accepted, for example German Heise c't feed
FIXED - From field made editable when switching identities under certain circumstances - Bug 1850055
FIXED - SPAM folders with non-ASCII names didn't work - Bug 1816332
FIXED - Status feedback when loading messages and downloading IMAP messages - Bug 1832149
FIXED - Thread collapsed/expanded status not restored of folder "grouped by sort", thread no opened to selection - Bug 1851320
FIXED - Saving draft/template didn't respect the original storage location in a subfolder - Bug 263114
FIXED - Delivery status notification (DSN) request not working when "Send Later" is used - Bug 815638
Other fixes not contained in Thunderbird 115.2.3 yet: Bug 673703, Bug 1806860, Bug 1831280, Bug 1836735, Bug 1840500, Bug 1847791, Bug 1854035

New in Betterbird 102.15.1-bb41 (13 September 2023) (Sep 14, 2023)

New in Betterbird 115.2.1-bb11 Preview (12 September 2023) (Sep 13, 2023)

Based on Thunderbird 115.2.1:
Betterbird 115 offers all the features and bug fixes mentioned on the feature table on the home page: Multi-line view, complex search terms, regular expression search, search in encrypted messages, improved Windows and Linux system tray integration, and many more. During the preview period we're featuring improvements compared to Thunderbird 115 in the release notes.
FIXED IN THIS VERSION:
RESTORED - Menu bar at the top of the main window (not underneath the new unified toolbar)
RESTORED - Total and unread/selected count removed from status bar (futher improvements in 115.1.0, GitHub #183) - Bug 1831667
RESTORED - No more connecting lines in threaded view - Bug 1829470
RESTORED - Visual feedback during Quick Filter Search - Bug 1831500
RESTORED - Broken feed functionality, a lot of breakage in Thunderbird "Supernova": Feed updates, icons, etc.
MITIGATED - Problem with restoring message and folder tabs after restart on large profiles with many calendars - Bug 1841411
CHANGED - Reduced row height of multi-line view to follow row height of card view (changed in 115.1.0)
NEW - Vertically aligned tabs
NEW - Attachment list on top
NEW - Header pane resize
NEW - Minimize to system tray on Linux (KDE, Gnome, Xfce desktops), improved in 115.2.1
CHANGED - New program icons for Mac (compliant with Apple rules)
CHANGED - Tab titles restore quicker (not a fix for tab restoral problem, see above)
CHANGED - More Troubleshooting Information now also displays identity and server keys
NEW - New preference gloda.list.immediate to show the search result as list immediately without having to click "Show results as list". Values: 0: Facet view, 1: Facet view and list view, 2: List view only. - Bug 580252
FIXED - Dummy rows in grouped view contained artefacts from other rows - Bug 1839035
FIXED - Format incorrect when replying with selection to non-flowed plain text message - Bug 1839226
FIXED - Subject of encrypted messages not shown in message list - Bug 1843833
FIXED - Can't cancel sending message - Bug 1816540
FIXED - Display of new or unread messages in system tray not reliable
FIXED better - Display/repair of some messages (incl. subject) with incorrect charset headers - Bug 1739609
FIXED - Can't drag contact on mailing list in other address book - Bug 1782397
FIXED - Some feeds, particularly from Feedburner, not working - Bug 1803739
FIXED - Reply prefix ("Re:", "RE:") not detected for news messages - Bug 1845155
FIXED - Support for FQDN in message IDs (don't know that that is? Don't worry about it) - Bug 1846837
FIXED - Problems with long attachment names - Bug 1827882
FIXED - Invalid Atom feeds with missing title not accepted, for example German Heise c't feed
FIXED - From field made editable when switching identities under certain circumstances - Bug 1850055
FIXED - SPAM folders with non-ASCII names didn't work - Bug 1816332
FIXED - Status feedback when loading IMAP messages - Bug 1832149
FIXED - Thread collapsed/expanded status not restored of folder "grouped by sort" - Bug 1851320
FIXED - Saving draft/template didn't respect the original storage location in a subfolder - Bug 263114
FIXED - Delivery status notification (DSN) request not working when "Send Later" is used - Bug 815638
Other fixes not contained in Thunderbird 115.2.1 yet: Bug 673703, Bug 1670457, Bug 1673446, Bug 1806860, Bug 1831280, Bug 1836735, Bug 1840500, Bug 1842384, Bug 1848155, Bug 1848261, Bug 1848366, Bug 1849919, Bug 1850281, Bug 1850760 Bug 1850850, Bug 1851563,

New in Betterbird 115.2.0-bb10 Preview (28 August 2023) (Sep 1, 2023)

Based on Thunderbird 115.2.0, release notes.
Betterbird 115 offers all the features and bug fixes mentioned on the feature table on the home page: Multi-line view, complex search terms, regular expression search, search in encrypted messages, improved Windows and Linux system tray integration, and many more. During the preview period we're featuring improvements compared to Thunderbird 115 in the release notes.
Fixed in this version:
RESTORED - Menu bar at the top of the main window (not underneath the new unified toolbar)
RESTORED - Total and unread/selected count removed from status bar (futher improvements in 115.1.0, GitHub #183) - Bug 1831667
RESTORED - No more connecting lines in threaded view - Bug 1829470
RESTORED - Visual feedback during Quick Filter Search - Bug 1831500
RESTORED - Broken feed functionality, a lot of breakage in Thunderbird "Supernova": Feed updates, icons, etc.
MITIGATED - Problem with restoring message and folder tabs after restart on large profiles with many calendars - Bug 1841411
CHANGED - Reduced row height of multi-line view to follow row height of card view (changed in 115.1.0)
NEW - Vertical tabs
NEW - Attachments on top
NEW - Header pane resize
NEW - Minimize to system tray on Linux (KDE and Gnome desktops)
CHANGED - New program icons for Mac (compliant with Apple rules)
CHANGED - Tab titles restore quicker (not a fix for tab restoral problem, see above)
NEW - New preference gloda.list.immediate to show the search result as list immediately without having to click "Show results as list". Values: 0: Facet view, 1: Facet view and list view, 2: List view only. - Bug 580252
FIXED - New mail (biff) indicator cleared prematurely when more than two new messages are received and read - Bug 1839805
FIXED - Dummy rows in grouped view contained artefacts from other rows - Bug 1839035
FIXED - Format incorrect when replying with selection to non-flowed plain text message - Bug 1839226
FIXED - Subject of encrypted messages not shown in message list - Bug 1843833
FIXED - Can't cancel sending message - Bug 1816540
FIXED - Display of new or unread messages in system tray not reliable
FIXED better - Display/repair of some messages (incl. subject) with incorrect charset headers - Bug 1739609
FIXED - Can't drag contact on mailing list in other address book - Bug 1782397
FIXED - Some feeds, particularly from Feedburner, not working - Bug 1803739
FIXED - Reply prefix ("Re:", "RE:") not detected for news messages - Bug 1845155
FIXED - Support for FQDN in message IDs (don't know that that is? Don't worry about it) - Bug 1846837
FIXED - Problems with long attachment names - Bug 1827882
FIXED - Invalid Atom feeds with missing title not accepted, for example German Heise c't feed
FIXED - From field made editable when switching identities under certain circumstances - Bug 1850055
Other fixes not contained in Thunderbird 115.1.1 yet: Bug 673703, Bug 1673446, Bug 1717382, Bug 1836735, Bug 1838672, Bug 1840092, Bug 1840500, Bug 1842384, Bug 1843707, Bug 1844452, Bug 1848366
Note that Thunderbird 115 is still very much work-in-progress with features destined for version 115 still incomplete and various "Supernova" bugs not fixed in the current version.

New in Betterbird 102.15.0-bb40 (29 August 2023) (Sep 1, 2023)

Fixed in this version:
NEW - Minimize to system tray on Linux (KDE and Gnome desktops)
CHANGED - More Troubleshooting Information now also displays identity and server keys
FIXED better - Display/repair of some messages (incl. subject) with incorrect charset headers - Bug 1739609
FIXED - Can't drag contact on mailing list in other address book - Bug 1782397
FIXED - From field made editable when switching identities under certain circumstances - Bug 1850055
Fixed in Betterbird, not fixed in Thunderbird 102.15.0 yet:
Fixes provided by the Betterbird project and integrated into Thunderbird to be released later
CHANGED - Improved the Sending progress dialogue: Now works during retry if previous dialogue was cancelled (fixed in 102.9.1) - Bug 1824624
FIXED - Hang when viewing HTML message with many links as plain text (possible denial of service attack vector) (fixed in 102.9.0) - Bug 1812386
FIXED - Subscribe/Unsubscribe buttons didn't check/uncheck the respective checkbox for the folder) (fixed in 102.7.1) - Bug 1813346
CHANGED - Selecting or unselecting a dictionary in the editor context menu doesn't close the menu (fixed in 102.0) - Bug 1761417
FIXED - Various problems when saving the compose window as file (fixed in 91.9.1) - Bug 1676825
FIXED - Status text sometimes displayed "null" (fixed in 91.9.0) - Bug 1766578
FIXED - .startup-incomplete not deleted from profile (fixed in 91.8.0) - Bug 1762043
FIXED - Inserting links with spaces gave random erroneous results (fixed in 91.0) - Bug 1563452
Various minor fixes that Thunderbird isn't shipping yet:
WITHDRAWN (as of 11th May 2023) - Problem with Google calendar descriptions - Bug 1792078
FIXED - Lost writing style on various occasions, for example after image insertion - Backout of bug 1730429
NEW - New preferences mail.biff.show_tray_icon_always to always show the system tray icon (in Betterbird effective for Windows and Linux) - Bug 1727874
FIXED - Cropping of subject lines with UTF-8 emoticons - Bug 1799093
FIXED - Send progress dialogue collapsed when sending encrypted message - Bug 1777788
CHANGED - Preference mail.smime.remind_encryption_possible set to true enabling the notification for possible S/MIME encryption - Bug 1808295
Other fixes: Bug 673703, Bug 1528297, Bug 1673446, Bug 1708320, Bug 1782415, Bug 1783517, Bug 1790619, Bug 1793313, Bug 1794117, Bug 1798597, Bug 1802685
Fixed in prior 102.x versions (Betterbird specific):
FIXED - Betterbird collected data for reporting without ever submitting it. Now data collection in the datareporting folder has been completely disabled. (fixed in 102.13.0)
FIXED - Update check didn't take policy DisableAppUpdate into account (fixed in 102.11.1) - GitHub #158
CHANGED - Linux: Using EGL 1.5 graphics now instead of GLX 1.4 fixing fuzzy fonts for some users (fixed in 102.9.1)
CHANGED - Linux: Now supporting sideloaded "application" add-ons stored in betterbird/extensions. To enable those add-ons, preference extensions.autoDisableScopes needs to be set to 3. (fixed in 102.9.1)
CHANGED - Multi-line support when add-on "Conversations" is used. Second line can be aligned with "Between" column. (fixed in 102.9.1)
CHANGED - Improved portable launcher. Can now be registered as default mail application on Windows. (fixed in 102.7.1)
CHANGED - Update check will now handle failure better (fixed in 102.6.1)
CHANGED - Followed Thunderbird by adding an "end-of-year donation appeal" (fixed in 102.6.0) - Bug 1801200
CHANGED - Reverted portable laucher to previous version so add-ons start more reliably without setting preference extensions.startupScanScopes to 5 or 7 (fixed in 102.5.1)
NEW - Re-enable additional languages (via Betterbird language packs) and language switching in the settings (fixed in 102.3.0)
NEW - Thunderbird language packs which are incompatible with Betterbird can no longer be installed (fixed in 102.3.0)
CHANGED - WM_CLASS on Linux is now "betterbird" (fixed in 102.3.0)
Features and fixes exclusive to Betterbird (new in the 102 series):
FIXED - Reply prefix ("Re:", "RE:") not detected for news messages (fixed in 102.14.0) - Bug 1845155
FIXED - Invalid Atom feeds with missing title not accepted, for example German Heise c't feed (fixed in 102.14.0)
NEW - New preference gloda.list.immediate to show the search result as list immediately without having to click "Show results as list". Values: 0: Facet view, 1: Facet view and list view, 2: List view only (fixed in 102.13.0) - Bug 580252
NEW - Icon configurability for main window and system tray, compose window and calendar dialogues (add/edit calendar, add/edit/summary event) have their own icons. See here for details. (fixed in 102.11.0 and 102.11.1) - GitHub #151
FIXED - Stability fix for folder search and Quick Filter in encrypted messages (fixed in 102.11.1)
FIXED - Issue with complex search terms when inserting a term at the top (fixed in 102.11.0)
CHANGED - Pref browser.download.start_downloads_in_tmp_dir now set to true to avoid .partfiles on desktop when opening attachments from the compose window (fixed in 102.11.0) - Bug 1800328
NEW - Preference mail.startupMinimized to minimise the main windows after startup (aka "startup minimised") (fixed in 102.10.1)
NEW - Preference mail.multiselect_message_shows_current to disable summaries on multi-select and display the last selected message (fixed in 102.10.0) - Bug 364896
CHANGED - Newsgroup folders now display the last selected message when multiple messages are selected. This also applies when when preference mail.operate_on_msgs_in_collapsed_threads is set to false. (fixed in 102.10.0) - Bug 364896
NEW - Improved display of complex search terms in filter editor, search window and virtual folder/saved searches window (fixed in 102.10.0)
FIXED - Improved the Sending progress dialogue: Incompatibility with add-on MailMerge (fixed in 102.11.0) - GitHub #150
CHANGED - Improved the Sending progress dialogue, no longer showing 100% when sending is cancelled (fixed in 102.9.1)
CHANGED - Improved the Sending/Saving progress dialogue now showing 100% successful sending (fixed in 102.9.0)
NEW - Short date entry in Calendar with formats DD, DDMM, DDMMYY and DDMMYYYY, for example 0505 to mean the 5th of May of the current year (fixed in 102.8.0)
NEW - Regular expressions in search terms (folder search and filters) via "matches" and "doesn't match" conditions. Note that matching is case-insensitive and is implemented using the C++ std::regex library, which (almost completely) follows the regular expression syntax in the ECMA-262 Standard. (fixed in 102.7.1) - Bug 19442
NEW (Linux) - System tray support for Linux (fixed in 102.7.0) - Bug 18732
NEW - Insert menu for plain text compositions (fixed in 102.7.0) - Bug 230684
FIXED (Mac) - Dragging a message to the desktop didn't work (fixed in 102.7.0) - Bug 1455429
FIXED - Problems with invalid S/MIME signatures on servers which add empty lines (fixed in 102.6.1) - Bug 1805558
FIXED better - Multiple spellcheck dictionaries not reliably set in new composition and not restored when editing draft (fixed in 102.6.1) - Bug 1775376
NEW - Restored Unix Movemail support (Linux and macOS) (pending GitHub #104) (fixed in 102.5.1) - Bug 1728778 Bug 1802145
FIXED - Folder search and search/virtual folder not working when based on more than 500 folders, also causing MSF file loss (fixed in 102.5.0) - Bug 1554188
FIXED - Status display "Searching..." not cleared when messages loaded for search/virtual folder (fixed in 102.5.0) - Bug 561328
NEW - More menu options for selecting multi-line view: All folders, individual folders, switched off (fixed in 102.3.1)
FIXED - "Open in Conversation" not present on menus when collapsed thread was selected (fixed in 102.3.1) - Bug 668491
FIXED - Fix drag of image from MyPhoneExplorer (MPE) to compose window (fixed in 102.3.0) - Bug 1790291
NEW - Added non-breaking hyphen (U+2011) and em-dash (U+2014) to "Insert Character/Symbol" menu (en-dash was added previously) (fixed in 102.2.1)
FIXED - Compositions using "fixed width" text at a non-default size erroneously downgraded to plain text (fixed in 102.2.0) - Bug 1786162
NEW - By popular demand, the multi-line view now also supports threading (fixed in 102.0)
CHANGED - Better styling for summary lines in "grouped by" multi-line views (fixed in 102.0)
NEW - Option to send message as HTML or plain text, depending on whether rich formatting is used (fixed in 102.0)
CHANGED - Unlike Thunderbird, Betterbird does not use a threaded view for new folders (preference mailnews.default_view_flags, 0 = normal, 1 = threaded) (fixed in 102.0)
FIXED - Some disturbing error console messages (fixed in 102.0) - Bug 1744944
FIXED - Multiple spellcheck dictionaries not reliably set in new composition and not restored when editing draft (fixed in 102.0) - Bug 1775376
Features and fixes exclusive to Betterbird (already in the 91 series):
NEW - Multi-line view. View > Layout > Multi-line View On All Folders or per folder in the column picker
NEW - Search terms now allow for complex expressions by adding a group feature - Bug 297852
NEW - Quick Filter untagged messages - Bug 683809
FIXED - Global search in encrypted messages (needs to be enabled in preferences) - Bug 188988
NEW - Regular folder search and Quick Filter in encrypted messages - Bug 1562737
CHANGED - Windows system tray ("systray") tooltip now showing list folders with new messages - Bug 1721063
NEW - Context menu in a news message now includes "Open Message For ID" (message pane only, not in message in tab)
FIXED - New posts in ignored threads caused "phantom" unread messages. "Mark > Thread As Read" will fix corruption - Bug 799040
NEW - Preferences mail.addressDisplayAuthor and mail.addressDisplayRecipients (1 = name, 2 = e-mail, 3 = both) for message list display - Bug 697031
NEW - Showing file URL for detached attachments, correct size and strike-through for deleted files - Bug 1740956, Bug 1741093
NEW - Folder context menu now offers to set folder as startup folder (instead of last visited)
NEW - Add Recent menu to allow attaching recently used files (Windows only) - Bug 1560737
FIXED - Issues when dragging Windows shell link (.lnk) or folder to Write (compose) window - Bug 276869, Bug 524874
CHANGED - Activity manager opens in tab
FIXED - Attachments saved via double-click didn't get listed in the list of saved files (Ctrl+J) - Bug 1744709
NEW - Ctrl+Shift+Space inserts NBSP now, also mostly fixes "automatic" unwanted NBSP replacement - Bug 532712
FIXED - Copying NBSP replaced NBSP with regular space (fixed in 91.8.0) - Bug 359303, Bug 1769534
FIXED - Repair Text Encoding didn't repair the subject - Bug 1739609
Not mentioned in the front page feature table:
NEW - Preference mail.openpgp.ignore_missing_mdc to allow display of attachments with missing MDC - Bug 1729221
NEW - Added preference mail.biff.show_for_server to optionally suppress biff notifications for server root folders.
FIXED - Subject change with "new subject (was: old subject)" didn't work - Bug 1680425
FIXED - Feed reader didn't tolerate any XML errors; now it will try fetching the feed as HTML as a fallback - Bug 1746749
FIXED - Moving multiple IMAP folders didn't work - Bug 589008
FIXED - Copying an embedded image didn't work under certain circumstances - Bug 1760365
FIXED - ... and a few more: Comma in detached file name (Bug 350825), Charset forward detection (Bug 1737245), Charset detection (Bug 1746695)

New in Betterbird 115.1.1-bb9 Preview (15 August 2023) (Aug 16, 2023)

Based on Thunderbird 115.1.1:
Betterbird 115 offers all the features and bug fixes mentioned on the feature table on the home page: Multi-line view, complex search terms, regular expression search, search in encrypted messages, improved Windows and Linux system tray integration, and many more. During the preview period we're featuring improvements compared to Thunderbird 115 in the release notes.
FIXED IN THIS VERSION:
RESTORED - Menu bar at the top of the main window (not underneath the new unified toolbar)
RESTORED - Total and unread/selected count removed from status bar (futher improvements in 115.1.0, GitHub #183) - Bug 1831667
RESTORED - No more connecting lines in threaded view - Bug 1829470
RESTORED - Visual feedback during Quick Filter Search - Bug 1831500
RESTORED - Broken feed functionality, a lot of breakage in Thunderbird "Supernova": Feed updates, icons, etc.
MITIGATED - Problem with restoring message and folder tabs after restart on large profiles with many calendars - Bug 1841411
CHANGED - Reduced row height of multi-line view to follow row height of card view (changed in 115.1.0)
NEW - Vertical tabs
CHANGED - New program icons for Mac (compliant with Apple rules)
CHANGED - Tab titles restore quicker (not a fix for tab restoral problem, see above)
NEW - New preference gloda.list.immediate to show the search result as list immediately without having to click "Show results as list". Values: 0: Facet view, 1: Facet view and list view, 2: List view only. - Bug 580252
FIXED - New mail (biff) indicator cleared prematurely when more than two new messages are received and read - Bug 1839805
FIXED - Dummy rows in grouped view contained artefacts from other rows - Bug 1839035
FIXED - Format incorrect when replying with selection to non-flowed plain text message - Bug 1839226
FIXED - Subject of encrypted messages not shown in message list - Bug 1843833
FIXED - Can't cancel sending message - Bug 1816540
FIXED - Display of new or unread messages in system tray not reliable
FIXED better - Display/repair of some messages (incl. subject) with incorrect charset headers - Bug 1739609
FIXED - Can't drag contact on mailing list in other address book - Bug 1782397
FIXED - Some feeds, particularly from Feedburner, not working - Bug 1803739
FIXED - Reply prefix ("Re:", "RE:") not detected for news messages - Bug 1845155
FIXED - Support for FQDN in message IDs (don't know that that is? Don't worry about it) - Bug 1846837
FIXED - Problems with long attachment names - Bug 1827882
FIXED - Buttons on Permission Manager dysfuncional - Bug 1847576
FIXED - Invalid Atom feeds with missing title not accepted, for example German Heise c't feed
Other fixes not contained in Thunderbird 115.1.1 yet: Bug 673703, Bug 1673446, Bug 1817705, Bug 1833298, Bug 1836735, Bug 1840092, Bug 1840500, Bug 1842384, Bug 1843462, Bug 1843707, Bug 1845011, Bug 1845457, Bug 1845464, Bug 1845593, Bug 1845645, Bug 1845699, Bug 1846860, Bug 1846885, Bug 1847842, Bug 1847966, Bug 1848507
Note that Thunderbird 115 is still very much work-in-progress with features destined for version 115 still incomplete and various "Supernova" bugs not fixed in the current version.

New in Betterbird 102.14.0-bb39 (1 August 2023) (Aug 7, 2023)

New in Betterbird 115.0.1-bb8 Preview (1 August 2023) (Aug 7, 2023)

Based on Thunderbird 115.1.0, release notes.
Betterbird 115 offers all the features and bug fixes mentioned on the feature table on the home page: Multi-line view, complex search terms, regular expression search, search in encrypted messages, improved Windows and Linux system tray integration, and many more. During the preview period we're featuring improvements compared to Thunderbird 115 in the release notes.
Fixed in this version:
RESTORED - Menu bar at the top of the main window (not underneath the new unified toolbar)
RESTORED - Total and unread/selected count removed from status bar (futher improvements in 115.1.0, GitHub #183) - Bug 1831667
RESTORED - No more connecting lines in threaded view - Bug 1829470
RESTORED (improved in Refresh) - Visual feedback during Quick Filter Search - Bug 1831500
RESTORED - Broken feed functionality, a lot of breakage in Thunderbird "Supernova": Feed updates, icons, etc.
MITIGATED - Problem with restoring message and folder tabs after restart on large profiles with many calendars - Bug 1841411
CHANGED - Reduced row height of multi-line view to follow row height of card view
NEW (Refresh) - Vertical tabs
CHANGED (Refresh) - Tab titles restore quicker (not a fix for tab restoral problem, see above)
NEW - New preference gloda.list.immediate to show the search result as list immediately without having to click "Show results as list". Values: 0: Facet view, 1: Facet view and list view, 2: List view only. - Bug 580252
FIXED - New mail (biff) indicator cleared prematurely when more than two new messages are received and read - Bug 1839805
FIXED - Dummy rows in grouped view contained artefacts from other rows - Bug 1839035
FIXED - Format incorrect when replying with selection to non-flowed plain text message - Bug 1839226
FIXED - Subject of encrypted messages not shown in message list - Bug 1843833
FIXED - Can't cancel sending message - Bug 1816540
FIXED - Display of new or unread messages in system tray not reliable
FIXED better (Refresh) - Display/repair of some messages (incl. subject) with incorrect charset headers - Bug 1739609
FIXED (Refresh) - Can't drag contact on mailing list in other address book - Bug 1782397
FIXED - Some feeds, particularly from Feedburner, not working - Bug 1803739
FIXED - Reply prefix ("Re:", "RE:") not detected for news messages - Bug 1845155
FIXED (Refresh) - Support for FQDN in message IDs (don't know that that is? Don't worry about it) - Bug 1846837
FIXED - Problems with long attachment names - Bug 1827882
FIXED - Invalid Atom feeds with missing title not accepted, for example German Heise c't feed
Other fixes not contained in Thunderbird 115.1.0 yet: Bug 673703, Bug 1673446, Bug 1835173, Bug 1836735, Bug 1840500, Bug 1843707, Bug 1844534, Bug 1845457
Note that Thunderbird 115 is still very much work-in-progress with features destined for version 115 still incomplete and various "Supernova" bugs not fixed in the current version.

New in Betterbird 115.0.1-bb7 Preview (17 July 2023) (Jul 23, 2023)

New in Betterbird 115.0-bb6 Preview (8 July 2023) (Jul 13, 2023)

New in Betterbird 102.13.0-bb38 (5 July 2023) (Jul 6, 2023)

Based on Thunderbird 102.13.0, release notes.
Fixed in this version:
NEW - New preference gloda.list.immediate to show the search result as list immediately without having to click "Show results as list". Values: 0: Facet view, 1: Facet view and list view, 2: List view only. - Bug 580252
FIXED - Betterbird collected data for reporting without ever submitting it. Now data collection in the datareporting folder has been completely disabled.
Fixed in Betterbird, not fixed in Thunderbird 102.13.0 yet:
Fixes provided by the Betterbird project and integrated into Thunderbird to be released later
CHANGED - Improved the Sending progress dialogue: Now works during retry if previous dialogue was cancelled (fixed in 102.9.1) - Bug 1824624
FIXED - Hang when viewing HTML message with many links as plain text (possible denial of service attack vector) (fixed in 102.9.0) - Bug 1812386
FIXED - Subscribe/Unsubscribe buttons didn't check/uncheck the respective checkbox for the folder) (fixed in 102.7.1) - Bug 1813346
CHANGED - Selecting or unselecting a dictionary in the editor context menu doesn't close the menu (fixed in 102.0) - Bug 1761417
FIXED - Various problems when saving the compose window as file (fixed in 91.9.1) - Bug 1676825
FIXED - Status text sometimes displayed "null" (fixed in 91.9.0) - Bug 1766578
FIXED - .startup-incomplete not deleted from profile (fixed in 91.8.0) - Bug 1762043
FIXED - Inserting links with spaces gave random erroneous results (fixed in 91.0) - Bug 1563452
Various minor fixes that Thunderbird isn't shipping yet:
WITHDRAWN (as of 11th May 2023) - Problem with Google calendar descriptions - Bug 1792078
FIXED - Lost writing style on various occasions, for example after image insertion - Backout of bug 1730429
NEW - New preferences mail.biff.show_tray_icon_always to always show the system tray icon (in Betterbird effective for Windows and Linux) - Bug 1727874
FIXED - Cropping of subject lines with UTF-8 emoticons - Bug 1799093
FIXED - Send progress dialogue collapsed when sending encrypted message - Bug 1777788
CHANGED - Preference mail.smime.remind_encryption_possible set to true enabling the notification for possible S/MIME encryption - Bug 1808295
Other fixes: Bug 1528297, Bug 1708320, Bug 1782415, Bug 1783517, Bug 1790619, Bug 1793313, Bug 1794117, Bug 1798597, Bug 1802685
Fixed in prior 102.x versions (Betterbird specific):
FIXED - Update check didn't take policy DisableAppUpdate into account (fixed in 102.11.1) - GitHub #158
CHANGED - Linux: Using EGL 1.5 graphics now instead of GLX 1.4 fixing fuzzy fonts for some users (fixed in 102.9.1)
CHANGED - Linux: Now supporting sideloaded "application" add-ons stored in betterbird/extensions. To enable those add-ons, preference extensions.autoDisableScopes needs to be set to 3. (fixed in 102.9.1)
CHANGED - Multi-line support when add-on "Conversations" is used. Second line can be aligned with "Between" column. (fixed in 102.9.1)
CHANGED - Improved portable launcher. Can now be registered as default mail application on Windows. (fixed in 102.7.1)
CHANGED - Update check will now handle failure better (fixed in 102.6.1)
CHANGED - Followed Thunderbird by adding an "end-of-year donation appeal" (fixed in 102.6.0) - Bug 1801200
CHANGED - Reverted portable laucher to previous version so add-ons start more reliably without setting preference extensions.startupScanScopes to 5 or 7 (fixed in 102.5.1)
NEW - Re-enable additional languages (via Betterbird language packs) and language switching in the settings (fixed in 102.3.0)
NEW - Thunderbird language packs which are incompatible with Betterbird can no longer be installed (fixed in 102.3.0)
CHANGED - WM_CLASS on Linux is now "betterbird" (fixed in 102.3.0)
Features and fixes exclusive to Betterbird (new in the 102 series):
NEW - Icon configurability for main window and system tray, compose window and calendar dialogues (add/edit calendar, add/edit/summary event) have their own icons. See here for details. (fixed in 102.11.0 and 102.11.1) - GitHub #151
FIXED - Stability fix for folder search and Quick Filter in encrypted messages (fixed in 102.11.1)
FIXED - Issue with complex search terms when inserting a term at the top (fixed in 102.11.0)
CHANGED - Pref browser.download.start_downloads_in_tmp_dir now set to true to avoid .partfiles on desktop when opening attachments from the compose window (fixed in 102.11.0) - Bug 1800328
NEW - Preference mail.startupMinimized to minimise the main windows after startup (aka "startup minimised") (fixed in 102.10.1)
NEW - Preference mail.multiselect_message_shows_current to disable summaries on multi-select and display the last selected message (fixed in 102.10.0) - Bug 364896
CHANGED - Newsgroup folders now display the last selected message when multiple messages are selected. This also applies when when preference mail.operate_on_msgs_in_collapsed_threads is set to false. (fixed in 102.10.0) - Bug 364896
NEW - Improved display of complex search terms in filter editor, search window and virtual folder/saved searches window (fixed in 102.10.0)
FIXED - Improved the Sending progress dialogue: Incompatibility with add-on MailMerge (fixed in 102.11.0) - GitHub #150
CHANGED - Improved the Sending progress dialogue, no longer showing 100% when sending is cancelled (fixed in 102.9.1)
CHANGED - Improved the Sending/Saving progress dialogue now showing 100% successful sending (fixed in 102.9.0)
NEW - Short date entry in Calendar with formats DD, DDMM, DDMMYY and DDMMYYYY, for example 0505 to mean the 5th of May of the current year (fixed in 102.8.0)
NEW - Regular expressions in search terms (folder search and filters) via "matches" and "doesn't match" conditions. Note that matching is case-insensitive and is implemented using the C++ std::regex library, which (almost completely) follows the regular expression syntax in the ECMA-262 Standard. (fixed in 102.7.1) - Bug 19442
NEW (Linux) - System tray support for Linux (fixed in 102.7.0) - Bug 18732
NEW - Insert menu for plain text compositions (fixed in 102.7.0) - Bug 230684
FIXED (Mac) - Dragging a message to the desktop didn't work (fixed in 102.7.0) - Bug 1455429
FIXED - Problems with invalid S/MIME signatures on servers which add empty lines (fixed in 102.6.1) - Bug 1805558
FIXED better - Multiple spellcheck dictionaries not reliably set in new composition and not restored when editing draft (fixed in 102.6.1) - Bug 1775376
NEW - Restored Unix Movemail support (Linux and macOS) (pending GitHub #104) (fixed in 102.5.1) - Bug 1728778 Bug 1802145
FIXED - Folder search and search/virtual folder not working when based on more than 500 folders, also causing MSF file loss (fixed in 102.5.0) - Bug 1554188
FIXED - Status display "Searching..." not cleared when messages loaded for search/virtual folder (fixed in 102.5.0) - Bug 561328
NEW - More menu options for selecting multi-line view: All folders, individual folders, switched off (fixed in 102.3.1)
FIXED - "Open in Conversation" not present on menus when collapsed thread was selected (fixed in 102.3.1) - Bug 668491
FIXED - Fix drag of image from MyPhoneExplorer (MPE) to compose window (fixed in 102.3.0) - Bug 1790291
NEW - Added non-breaking hyphen (U+2011) and em-dash (U+2014) to "Insert Character/Symbol" menu (en-dash was added previously) (fixed in 102.2.1)
FIXED - Compositions using "fixed width" text at a non-default size erroneously downgraded to plain text (fixed in 102.2.0 )- Bug 1786162
NEW - By popular demand, the multi-line view now also supports threading (fixed in 102.0)
CHANGED - Better styling for summary lines in "grouped by" multi-line views (fixed in 102.0)
NEW - Option to send message as HTML or plain text, depending on whether rich formatting is used (fixed in 102.0)
CHANGED - Unlike Thunderbird, Betterbird does not use a threaded view for new folders (preference mailnews.default_view_flags, 0 = normal, 1 = threaded) (fixed in 102.0)
FIXED - Some disturbing error console messages (fixed in 102.0) - Bug 1744944
FIXED - Multiple spellcheck dictionaries not reliably set in new composition and not restored when editing draft (fixed in 102.0) - Bug 1775376
Features and fixes exclusive to Betterbird (already in the 91 series):
NEW - Multi-line view. View > Layout > Multi-line View On All Folders or per folder in the column picker
NEW - Search terms now allow for complex expressions by adding a group feature - Bug 297852
NEW - Quick Filter untagged messages - Bug 683809
FIXED - Global search in encrypted messages (needs to be enabled in preferences) - Bug 188988
NEW - Regular folder search and Quick Filter in encrypted messages - Bug 1562737
CHANGED - Windows system tray ("systray") tooltip now showing list folders with new messages - Bug 1721063
NEW - Context menu in a news message now includes "Open Message For ID" (message pane only, not in message in tab)
FIXED - New posts in ignored threads caused "phantom" unread messages. "Mark > Thread As Read" will fix corruption - Bug 799040
NEW - Preferences mail.addressDisplayAuthor and mail.addressDisplayRecipients (1 = name, 2 = e-mail, 3 = both) for message list display - Bug 697031
NEW - Showing file URL for detached attachments, correct size and strike-through for deleted files - Bug 1740956, Bug 1741093
NEW - Folder context menu now offers to set folder as startup folder (instead of last visited)
NEW - Add Recent menu to allow attaching recently used files (Windows only) - Bug 1560737
FIXED - Issues when dragging Windows shell link (.lnk) or folder to Write (compose) window - Bug 276869, Bug 524874
CHANGED - Activity manager opens in tab
FIXED - Attachments saved via double-click didn't get listed in the list of saved files (Ctrl+J) - Bug 1744709
NEW - Ctrl+Shift+Space inserts NBSP now, also mostly fixes "automatic" unwanted NBSP replacement - Bug 532712
FIXED - Copying NBSP replaced NBSP with regular space (fixed in 91.8.0) - Bug 359303, Bug 1769534
FIXED - Repair Text Encoding didn't repair the subject - Bug 1739609
Not mentioned in the front page feature table:
NEW - Preference mail.openpgp.ignore_missing_mdc to allow display of attachments with missing MDC - Bug 1729221
NEW - Added preference mail.biff.show_for_server to optionally suppress biff notifications for server root folders.
FIXED - Subject change with "new subject (was: old subject)" didn't work - Bug 1680425
FIXED - Feed reader didn't tolerate any XML errors; now it will try fetching the feed as HTML as a fallback - Bug 1746749
FIXED - Moving multiple IMAP folders didn't work - Bug 589008
FIXED - Copying an embedded image didn't work under certain circumstances - Bug 1760365
FIXED - ... and a few more: Comma in detached file name (Bug 350825), Charset forward detection (Bug 1737245), Charset detection (Bug 1746695)

New in Betterbird 115.0b3-bb2 (16 June 2023) (Jun 16, 2023)

New in Betterbird 102.12.0-bb37 (6 May 2023) (Jun 7, 2023)

Based on Thunderbird 102.12.0, release notes.
Fixed in this version:
Nothing new this time, folks, but still many fixes ahead of Thunderbird.
Fixed in Betterbird, not fixed in Thunderbird 102.12.0 yet:
Fixes provided by the Betterbird project and integrated into Thunderbird to be released later
CHANGED - Improved the Sending progress dialogue: Now works during retry if previous dialogue was cancelled (fixed in 102.9.1) - Bug 1824624
FIXED - Hang when viewing HTML message with many links as plain text (possible denial of service attack vector) (fixed in 102.9.0) - Bug 1812386
FIXED - Subscribe/Unsubscribe buttons didn't check/uncheck the respective checkbox for the folder) (fixed in 102.7.1) - Bug 1813346
CHANGED - Selecting or unselecting a dictionary in the editor context menu doesn't close the menu (fixed in 102.0) - Bug 1761417
FIXED - Various problems when saving the compose window as file (fixed in 91.9.1) - Bug 1676825
FIXED - Status text sometimes displayed "null" (fixed in 91.9.0) - Bug 1766578
FIXED - .startup-incomplete not deleted from profile (fixed in 91.8.0) - Bug 1762043
FIXED - Inserting links with spaces gave random erroneous results (fixed in 91.0) - Bug 1563452
Various minor fixes that Thunderbird ins't shipping yet:
WITHDRAWN (as of 11th May 2023) - Problem with Google calendar descriptions - Bug 1792078
FIXED - Lost writing style on various occasions, for example after image insertion - Backout of bug 1730429
NEW - New preferences mail.biff.show_tray_icon_always to always show the system tray icon (in Betterbird effective for Windows and Linux) - Bug 1727874
FIXED - Cropping of subject lines with UTF-8 emoticons - Bug 1799093
FIXED - Send progress dialogue collapsed when sending encrypted message - Bug 1777788
CHANGED - Preference mail.smime.remind_encryption_possible set to true enabling the notification for possible S/MIME encryption - Bug 1808295
Other fixes: Bug 1528297, Bug 1708320, Bug 1782415, Bug 1783517, Bug 1790619, Bug 1793313, Bug 1794117, Bug 1794180, Bug 1798597, Bug 1802685
Fixed in prior 102.x versions (Betterbird specific):
FIXED - Update check didn't take policy DisableAppUpdate into account (fixed in 102.11.1) - GitHub #158
CHANGED - Linux: Using EGL 1.5 graphics now instead of GLX 1.4 fixing fuzzy fonts for some users (fixed in 102.9.1)
CHANGED - Linux: Now supporting sideloaded "application" add-ons stored in betterbird/extensions. To enable those add-ons, preference extensions.autoDisableScopes needs to be set to 3. (fixed in 102.9.1)
CHANGED - Multi-line support when add-on "Conversations" is used. Second line can be aligned with "Between" column. (fixed in 102.9.1)
CHANGED - Improved portable launcher. Can now be registered as default mail application on Windows. (fixed in 102.7.1)
CHANGED - Update check will now handle failure better (fixed in 102.6.1)
CHANGED - Followed Thunderbird by adding an "end-of-year donation appeal" (fixed in 102.6.0) - Bug 1801200
CHANGED - Reverted portable laucher to previous version so add-ons start more reliably without setting preference extensions.startupScanScopes to 5 or 7 (fixed in 102.5.1)
NEW - Re-enable additional languages (via Betterbird language packs) and language switching in the settings (fixed in 102.3.0)
NEW - Thunderbird language packs which are incompatible with Betterbird can no longer be installed (fixed in 102.3.0)
CHANGED - WM_CLASS on Linux is now "betterbird" (fixed in 102.3.0)
Features and fixes exclusive to Betterbird (new in the 102 series):
NEW - Icon configurability for main window and system tray, compose window and calendar dialogues (add/edit calendar, add/edit/summary event) have their own icons. See here for details. (fixed in 102.11.0 and 102.11.1) - GitHub #151
FIXED - Stability fix for folder search and Quick Filter in encrypted messages (fixed in 102.11.1)
FIXED - Issue with complex search terms when inserting a term at the top (fixed in 102.11.0)
CHANGED - Pref browser.download.start_downloads_in_tmp_dir now set to true to avoid .partfiles on desktop when opening attachments from the compose window (fixed in 102.11.0) - Bug 1800328
NEW - Preference mail.startupMinimized to minimise the main windows after startup (aka "startup minimised") (fixed in 102.10.1)
NEW - Preference mail.multiselect_message_shows_current to disable summaries on multi-select and display the last selected message (fixed in 102.10.0) - Bug 364896
CHANGED - Newsgroup folders now display the last selected message when multiple messages are selected. This also applies when when preference mail.operate_on_msgs_in_collapsed_threads is set to false. (fixed in 102.10.0) - Bug 364896
NEW - Improved display of complex search terms in filter editor, search window and virtual folder/saved searches window (fixed in 102.10.0)
FIXED - Improved the Sending progress dialogue: Incompatibility with add-on MailMerge (fixed in 102.11.0) - GitHub #150
CHANGED - Improved the Sending progress dialogue, no longer showing 100% when sending is cancelled (fixed in 102.9.1)
CHANGED - Improved the Sending/Saving progress dialogue now showing 100% successful sending (fixed in 102.9.0)
NEW - Short date entry in Calendar with formats DD, DDMM, DDMMYY and DDMMYYYY, for example 0505 to mean the 5th of May of the current year (fixed in 102.8.0)
NEW - Regular expressions in search terms (folder search and filters) via "matches" and "doesn't match" conditions. Note that matching is case-insensitive and is implemented using the C++ std::regex library, which (almost completely) follows the regular expression syntax in the ECMA-262 Standard. (fixed in 102.7.1) - Bug 19442
NEW (Linux) - System tray support for Linux (fixed in 102.7.0) - Bug 18732
NEW - Insert menu for plain text compositions (fixed in 102.7.0) - Bug 230684
FIXED (Mac) - Dragging a message to the desktop didn't work (fixed in 102.7.0) - Bug 1455429
FIXED - Problems with invalid S/MIME signatures on servers which add empty lines (fixed in 102.6.1) - Bug 1805558
FIXED better - Multiple spellcheck dictionaries not reliably set in new composition and not restored when editing draft (fixed in 102.6.1) - Bug 1775376
NEW - Restored Unix Movemail support (Linux and macOS) (pending GitHub #104) (fixed in 102.5.1) - Bug 1728778 Bug 1802145
FIXED - Folder search and search/virtual folder not working when based on more than 500 folders, also causing MSF file loss (fixed in 102.5.0) - Bug 1554188
FIXED - Status display "Searching..." not cleared when messages loaded for search/virtual folder (fixed in 102.5.0) - Bug 561328
NEW - More menu options for selecting multi-line view: All folders, individual folders, switched off (fixed in 102.3.1)
FIXED - "Open in Conversation" not present on menus when collapsed thread was selected (fixed in 102.3.1) - Bug 668491
FIXED - Fix drag of image from MyPhoneExplorer (MPE) to compose window (fixed in 102.3.0) - Bug 1790291
NEW - Added non-breaking hyphen (U+2011) and em-dash (U+2014) to "Insert Character/Symbol" menu (en-dash was added previously) (fixed in 102.2.1)
FIXED - Compositions using "fixed width" text at a non-default size erroneously downgraded to plain text (fixed in 102.2.0 )- Bug 1786162
NEW - By popular demand, the multi-line view now also supports threading (fixed in 102.0)
CHANGED - Better styling for summary lines in "grouped by" multi-line views (fixed in 102.0)
NEW - Option to send message as HTML or plain text, depending on whether rich formatting is used (fixed in 102.0)
CHANGED - Unlike Thunderbird, Betterbird does not use a threaded view for new folders (preference mailnews.default_view_flags, 0 = normal, 1 = threaded) (fixed in 102.0)
FIXED - Some disturbing error console messages (fixed in 102.0) - Bug 1744944
FIXED - Multiple spellcheck dictionaries not reliably set in new composition and not restored when editing draft (fixed in 102.0) - Bug 1775376

New in Betterbird 102.11.0-bb35 Build 2 (11 May 2023) (May 14, 2023)

New in Betterbird 102.11.0-bb35 (9 May 2023) (May 8, 2023)

New in Betterbird 102.10.1-bb34 (24 April 2023) (Apr 26, 2023)

Fixed in this version:
NEW - Preference mail.startupMinimized to minimise the main windows after startup (aka "startup minimised")
Fixed in Betterbird, not fixed in Thunderbird 102.10.1 yet:
Fixes provided by the Betterbird project and integrated into Thunderbird to be released later
CHANGED - Improved the Sending progress dialogue: Now works during retry if previous dialogue was cancelled (fixed in 102.9.1) - Bug 1824624
FIXED - Hang when viewing HTML message with many links as plain text (possible denial of service attack vector) (fixed in 102.9.0) - Bug 1812386
FIXED - Subscribe/Unsubscribe buttons didn't check/uncheck the respective checkbox for the folder) (fixed in 102.7.1) - Bug 1813346
CHANGED - Selecting or unselecting a dictionary in the editor context menu doesn't close the menu (fixed in 102.0) - Bug 1761417
FIXED - Various problems when saving the compose window as file (fixed in 91.9.1) - Bug 1676825
FIXED - Status text sometimes displayed "null" (fixed in 91.9.0) - Bug 1766578
FIXED - .startup-incomplete not deleted from profile (fixed in 91.8.0) - Bug 1762043
FIXED - Inserting links with spaces gave random erroneous results (fixed in 91.0) - Bug 1563452
Various minor fixes that Thunderbird ins't shipping yet:
FIXED - Improved IMAP error handling - Bug 1745130
FIXED - Lost writing style on various occasions, for example after image insertion - Backout of bug 1730429
NEW - New preferences mail.biff.show_tray_icon_always to always show the system tray icon (in Betterbird effective for Windows and Linux) - Bug 1727874
FIXED - Cropping of subject lines with UTF-8 emoticons - Bug 1799093
FIXED - Send progress dialogue collapsed when sending encrypted message - Bug 1777788
CHANGED - Preference mail.smime.remind_encryption_possible set to true enabling the notification for possible S/MIME encryption - Bug 1808295
Other fixes: Bug 1528297, Bug 1708320, Bug 1782415, Bug 1783517, Bug 1790619, Bug 1793313, Bug 1794117, Bug 1794180, Bug 1798597, Bug 1801286, Bug 1802685
Fixed in prior 102.x versions (Betterbird specific):
CHANGED - Linux: Using EGL 1.5 graphics now instead of GLX 1.4 fixing fuzzy fonts for some users (fixed in 102.9.1)
CHANGED - Linux: Now supporting sideloaded "application" add-ons stored in betterbird/extensions. To enable those add-ons, preference extensions.autoDisableScopes needs to be set to 3. (fixed in 102.9.1)
CHANGED - Multi-line support when add-on "Conversations" is used. Second line can be aligned with "Between" column. (fixed in 102.9.1)
CHANGED - Improved portable launcher. Can now be registered as default mail application on Windows. (fixed in 102.7.1)
CHANGED - Update check will now handle failure better (fixed in 102.6.1)
CHANGED - Followed Thunderbird by adding an "end-of-year donation appeal" (fixed in 102.6.0) - Bug 1801200
CHANGED - Reverted portable laucher to previous version so add-ons start more reliably without setting preference extensions.startupScanScopes to 5 or 7 (fixed in 102.5.1)
NEW - Re-enable additional languages (via Betterbird language packs) and language switching in the settings (fixed in 102.3.0)
NEW - Thunderbird language packs which are incompatible with Betterbird can no longer be installed (fixed in 102.3.0)
CHANGED - WM_CLASS on Linux is now "betterbird" (fixed in 102.3.0)
Features and fixes exclusive to Betterbird (new in the 102 series):
NEW - Preference mail.multiselect_message_shows_current to disable summaries on multi-select and display the last selected message (fixed in 102.10.0) - Bug 364896
CHANGED - Newsgroup folders now display the last selected message when multiple messages are selected. This also applies when when preference mail.operate_on_msgs_in_collapsed_threads is set to false. (fixed in 102.10.0) - Bug 364896
NEW - Improved display of complex search terms in filter editor, search window and virtual folder/saved searches window (fixed in 102.10.0)
CHANGED - Improved the Sending progress dialogue, no longer showing 100% when sending is cancelled (fixed in 102.9.1)
CHANGED - Improved the Sending/Saving progress dialogue now showing 100% successful sending (fixed in 102.9.0)
NEW - Short date entry in Calendar with formats DD, DDMM, DDMMYY and DDMMYYYY, for example 0505 to mean the 5th of May of the current year (fixed in 102.8.0)
NEW - Regular expressions in search terms (folder search and filters) (fixed in 102.7.1) - Bug 19442
NEW (Linux) - System tray support for Linux (fixed in 102.7.0) - Bug 18732
NEW - Insert menu for plain text compositions (fixed in 102.7.0) - Bug 230684
FIXED (Mac) - Dragging a message to the desktop didn't work (fixed in 102.7.0) - Bug 1455429
FIXED - Problems with invalid S/MIME signatures on servers which add empty lines (fixed in 102.6.1) - Bug 1805558
FIXED better - Multiple spellcheck dictionaries not reliably set in new composition and not restored when editing draft (fixed in 102.6.1) - Bug 1775376
NEW - Restored Unix Movemail support (Linux and macOS) (pending GitHub #104) (fixed in 102.5.1) - Bug 1728778 Bug 1802145
FIXED - Folder search and search/virtual folder not working when based on more than 500 folders, also causing MSF file loss (fixed in 102.5.0) - Bug 1554188
FIXED - Status display "Searching..." not cleared when messages loaded for search/virtual folder (fixed in 102.5.0) - Bug 561328
NEW - More menu options for selecting multi-line view: All folders, individual folders, switched off (fixed in 102.3.1)
FIXED - "Open in Conversation" not present on menus when collapsed thread was selected (fixed in 102.3.1) - Bug 668491
FIXED - Fix drag of image from MyPhoneExplorer (MPE) to compose window (fixed in 102.3.0) - Bug 1790291
NEW - Added non-breaking hyphen (U+2011) and em-dash (U+2014) to "Insert Character/Symbol" menu (en-dash was added previously) (fixed in 102.2.1)
FIXED - Compositions using "fixed width" text at a non-default size erroneously downgraded to plain text (fixed in 102.2.0 )- Bug 1786162
NEW - By popular demand, the multi-line view now also supports threading (fixed in 102.0)
CHANGED - Better styling for summary lines in "grouped by" multi-line views (fixed in 102.0)
NEW - Option to send message as HTML or plain text, depending on whether rich formatting is used (fixed in 102.0)
CHANGED - Unlike Thunderbird, Betterbird does not use a threaded view for new folders (preference mailnews.default_view_flags, 0 = normal, 1 = threaded) (fixed in 102.0)
FIXED - Some disturbing error console messages (fixed in 102.0) - Bug 1744944
FIXED - Multiple spellcheck dictionaries not reliably set in new composition and not restored when editing draft (fixed in 102.0) - Bug 1775376

New in Betterbird 102.10.0-bb33 (11 April 2023) (Apr 12, 2023)

Fixed in this version:
NEW - Improved display of complex search terms in filter editor, search window and virtual folder/saved searches window
NEW - Preference mail.multiselect_message_shows_current to disable summaries on multi-select and display the last selected message - Bug 364896
CHANGED - Newsgroup folders now display the last selected message when multiple messages are selected. This also applies when when preference mail.operate_on_msgs_in_collapsed_threads is set to false. - Bug 364896
Fixed in Betterbird, not fixed in Thunderbird 102.10.0 yet:
Fixes provided by the Betterbird project and integrated into Thunderbird to be released later
CHANGED - Improved the Sending progress dialogue: Now works during retry if previous dialogue was cancelled (fixed in 102.9.1) - Bug 1824624
FIXED - Hang when viewing HTML message with many links as plain text (possible denial of service attack vector) (fixed in 102.9.0) - Bug 1812386
FIXED - Subscribe/Unsubscribe buttons didn't check/uncheck the respective checkbox for the folder) (fixed in 102.7.1) - Bug 1813346
CHANGED - Selecting or unselecting a dictionary in the editor context menu doesn't close the menu (fixed in 102.0) - Bug 1761417
FIXED - Various problems when saving the compose window as file (fixed in 91.9.1) - Bug 1676825
FIXED - Status text sometimes displayed "null" (fixed in 91.9.0) - Bug 1766578
FIXED - .startup-incomplete not deleted from profile (fixed in 91.8.0) - Bug 1762043
FIXED - Inserting links with spaces gave random erroneous results (fixed in 91.0) - Bug 1563452
Various minor fixes that Thunderbird ins't shipping yet:
FIXED - Improved IMAP error handling - Bug 1745130
FIXED - Lost writing style on various occasions, for example after image insertion - Backout of bug 1730429
NEW - New preferences mail.biff.show_tray_icon_always to always show the system tray icon (in Betterbird effective for Windows and Linux) - Bug 1727874
FIXED - Cropping of subject lines with UTF-8 emoticons - Bug 1799093
FIXED - Send progress dialogue collapsed when sending encrypted message - Bug 1777788
CHANGED - Preference mail.smime.remind_encryption_possible set to true enabling the notification for possible S/MIME encryption - Bug 1808295
Other fixes: Bug 1528297, Bug 1708320, Bug 1782415, Bug 1783517, Bug 1790619, Bug 1793313, Bug 1794117, Bug 1794180, Bug 1798597, Bug 1802685

New in Betterbird 102.9.1 (5 April) (Apr 6, 2023)

New in Betterbird 102.9.1 (28 March) (Mar 29, 2023)

Fixed in this version:
CHANGED - Improved the Sending progress dialogue, no longer showing 100% when sending is cancelled
CHANGED - Improved the Sending progress dialogue: Now works during retry if previous dialogue was cancelled - Bug 1824624
CHANGED - Linux: Using EGL 1.5 graphics now instead of GLX 1.4 fixing fuzzy fonts for some users
CHANGED - Linux: Now supporting sideloaded "application" add-ons stored in betterbird/extensions. To enable those add-ons, pref extensions.autoDisableScopes needs to be set to 3.
CHANGED - Multi-line support when add-on "Conversations" is used. Second line can be aligned with "Between" column.
Fixed in Betterbird, not fixed in Thunderbird 102.9.1 yet:
Fixes provided by the Betterbird project and integrated into Thunderbird to be released later
FIXED - Hang when viewing HTML message with many links as plain text (possible denial of service attack vector) (fixed in 102.9.0) - Bug 1812386
FIXED - Subscribe/Unsubscribe buttons didn't check/uncheck the respective checkbox for the folder) (fixed in 102.7.1) - Bug 1813346
CHANGED - Selecting or unselecting a dictionary in the editor context menu doesn't close the menu (fixed in 102.0) - Bug 1761417
FIXED - Various problems when saving the compose window as file (fixed in 91.9.1) - Bug 1676825
FIXED - Status text sometimes displayed "null" (fixed in 91.9.0) - Bug 1766578
FIXED - .startup-incomplete not deleted from profile (fixed in 91.8.0) - Bug 1762043
FIXED - Inserting links with spaces gave random erroneous results (fixed in 91.0) - Bug 1563452
Various minor fixes that Thunderbird ins't shipping yet:
FIXED - Improved IMAP error handling - Bug 1745130
FIXED - Lost writing style on various occasions, for example after image insertion - Backout of bug 1730429
NEW - New preferences mail.biff.show_tray_icon_always to always show the system tray icon (in Betterbird effective for Windows and Linux) - Bug 1727874
FIXED - Cropping of subject lines with UTF-8 emoticons - Bug 1799093
FIXED - Send progress dialogue collapsed when sending encrypted message - Bug 1777788
CHANGED - Pref mail.smime.remind_encryption_possible set to true enabling the notification for possible S/MIME encryption - Bug 1808295
Other fixes: Bug 1528297, Bug 1708320, Bug 1782415, Bug 1783517, Bug 1790619, Bug 1793313, Bug 1794117, Bug 1794180, Bug 1798597, Bug 1802685

New in Betterbird 102.9.0 (21/23 March) (Mar 27, 2023)

New in Betterbird 102.9.0 (Mar 19, 2023)

Based on Thunderbird 102.9.0:
Fixed in this version:
CHANGED - Improved the Sending/Saving progress dialogue now showing 100% successful sending
FIXED - Hang when viewing HTML message with many links as plain text (possible denial of service attack vector) - Bug 1812386
FIXED - Lost writing style on various occasions, for example after image insertion - Backout of bug 1730429
FIXED correctly - Moving multiple IMAP folders didn't work - Bug 589008
FIXED - Improved IMAP error handling - Bug 1745130
Fixed in Betterbird, not fixed in Thunderbird 102.9.0 yet:
Fixes provided by the Betterbird project and integrated into Thunderbird to be released later
FIXED - Command line couldn't handle file: URL, for example: -url file:///home/user/import.ics (fixed in 102.8.0) - Bug 1816343
FIXED - Subscribe/Unsubscribe buttons didn't check/uncheck the respective checkbox for the folder) (fixed in 102.7.1) - Bug 1813346
CHANGED - Selecting or unselecting a dictionary in the editor context menu doesn't close the menu (fixed in 102.0) - Bug 1761417
FIXED - Various problems when saving the compose window as file (fixed in 91.9.1) - Bug 1676825
FIXED - Status text sometimes displayed "null" (fixed in 91.9.0) - Bug 1766578
FIXED - .startup-incomplete not deleted from profile (fixed in 91.8.0) - Bug 1762043
FIXED - Inserting links with spaces gave random erroneous results (fixed in 91.0) - Bug 1563452
Various minor fixes that Thunderbird ins't shipping yet:
NEW - New preferences mail.biff.show_tray_icon_always to always show the system tray icon (in Betterbird effective for Windows and Linux) - Bug 1727874
FIXED - Cropping of subject lines with UTF-8 emoticons - Bug 1799093
FIXED - Send progress dialogue collapsed when sending encrypted message - Bug 1777788
CHANGED - Pref mail.smime.remind_encryption_possible set to true enabling the notification for possible S/MIME encryption - Bug 1808295
Other fixes: Bug 1528297, Bug 1708320, Bug 1782415, Bug 1783517, Bug 1790619, Bug 1793313, Bug 1794117, Bug 1794180, Bug 1798597, Bug 1802685
Fixed in prior 102.x versions (Betterbird specific):
CHANGED - Improved portable launcher. Can now be registered as default mail application on Windows. (fixed in 102.7.1)
CHANGED - Update check will now handle failure better (fixed in 102.6.1)
CHANGED - Followed Thunderbird by adding an "end-of-year donation appeal" (fixed in 102.6.0) - Bug 1801200
CHANGED - Reverted portable laucher to previous version so add-ons start more reliably without setting pref extensions.startupScanScopes to 5 or 7 (fixed in 102.5.1)
NEW - Re-enable additional languages (via Betterbird language packs) and language switching in the settings (fixed in 102.3.0)
NEW - Thunderbird language packs which are incompatible with Betterbird can no longer be installed (fixed in 102.3.0)
CHANGED - WM_CLASS on Linux is now "betterbird" (fixed in 102.3.0)
Features and fixes exclusive to Betterbird (new in the 102 series):
NEW - Short date entry in Calendar with formats DD, DDMM, DDMMYY and DDMMYYYY, for example 0505 to mean the 5th of May of the current year (fixed in 102.8.0)
NEW - Regular expressions in search terms (folder search and filters) (fixed in 102.7.1) - Bug 19442
NEW (Linux) - System tray support for Linux (fixed in 102.7.0) - Bug 18732
NEW - Insert menu for plain text compositions (fixed in 102.7.0) - Bug 230684
FIXED (Mac) - Dragging a message to the desktop didn't work (fixed in 102.7.0) - Bug 1455429
FIXED - Problems with invalid S/MIME signatures on servers which add empty lines (fixed in 102.6.1) - Bug 1805558
FIXED better - Multiple spellcheck dictionaries not reliably set in new composition and not restored when editing draft (fixed in 102.6.1) - Bug 1775376
NEW - Restored Unix Movemail support (Linux and macOS) (pending GitHub #104) (fixed in 102.5.1) - Bug 1728778 Bug 1802145
FIXED - Folder search and search/virtual folder not working when based on more than 500 folders, also causing MSF file loss (fixed in 102.5.0) - Bug 1554188
FIXED - Status display "Searching..." not cleared when messages loaded for search/virtual folder (fixed in 102.5.0) - Bug 561328
NEW - More menu options for selecting multi-line view: All folders, individual folders, switched off (fixed in 102.3.1)
FIXED - "Open in Conversation" not present on menus when collapsed thread was selected (fixed in 102.3.1) - Bug 668491
FIXED - Fix drag of image from MyPhoneExplorer (MPE) to compose window (fixed in 102.3.0) - Bug 1790291
NEW - Added non-breaking hyphen (U+2011) and em-dash (U+2014) to "Insert Character/Symbol" menu (en-dash was added previously) (fixed in 102.2.1)
FIXED - Compositions using "fixed width" text at a non-default size erroneously downgraded to plain text (fixed in 102.2.0 )- Bug 1786162
NEW - By popular demand, the multi-line view now also supports threading (fixed in 102.0)
CHANGED - Better styling for summary lines in "grouped by" multi-line views (fixed in 102.0)
NEW - Option to send message as HTML or plain text, depending on whether rich formatting is used (fixed in 102.0)
CHANGED - Unlike Thunderbird, Betterbird does not use a threaded view for new folders (preference mailnews.default_view_flags, 0 = normal, 1 = threaded) (fixed in 102.0)
FIXED - Some disturbing error console messages (fixed in 102.0) - Bug 1744944
FIXED - Multiple spellcheck dictionaries not reliably set in new composition and not restored when editing draft (fixed in 102.0) - Bug 1775376
Features and fixes exclusive to Betterbird (already in the 91 series):
NEW - Multi-line view. View > Layout > Multi-line View On All Folders or per folder in the column picker
NEW - Search terms now allow for complex expressions by adding a group feature - Bug 297852
NEW - Quick Filter untagged messages - Bug 683809
FIXED - Global search in encrypted messages (needs to be enabled in preferences) - Bug 188988
NEW - Regular folder search and Quick Filter in encrypted messages - Bug 1562737
CHANGED - Windows system tray ("systray") tooltip now showing list folders with new messages - Bug 1721063
NEW - Context menu in a news message now includes "Open Message For ID" (message pane only, not in message in tab)
FIXED - New posts in ignored threads caused "phantom" unread messages. "Mark > Thread As Read" will fix corruption - Bug 799040
NEW - Preferences mail.addressDisplayAuthor and mail.addressDisplayRecipients (1 = name, 2 = e-mail, 3 = both) for message list display - Bug 697031
NEW - Showing file URL for detached attachments, correct size and strike-through for deleted files - Bug 1740956, Bug 1741093
NEW - Folder context menu now offers to set folder as startup folder (instead of last visited)
NEW - Add Recent menu to allow attaching recently used files (Windows only) - Bug 1560737
FIXED - Issues when dragging Windows shell link (.lnk) or folder to Write (compose) window - Bug 276869, Bug 524874
CHANGED - Activity manager opens in tab
FIXED - Attachments saved via double-click didn't get listed in the list of saved files (Ctrl+J) - Bug 1744709
NEW - Ctrl+Shift+Space inserts NBSP now, also mostly fixes "automatic" unwanted NBSP replacement - Bug 532712
FIXED - Copying NBSP replaced NBSP with regular space (fixed in 91.8.0) - Bug 359303, Bug 1769534
FIXED - Repair Text Encoding didn't repair the subject - Bug 1739609
Not mentioned in the front page feature table:
NEW - Preference mail.openpgp.ignore_missing_mdc to allow display of attachments with missing MDC - Bug 1729221
NEW - Added preference mail.biff.show_for_server to optionally suppress biff notifications for server root folders.
FIXED - Subject change with "new subject (was: old subject)" didn't work - Bug 1680425
FIXED - Feed reader didn't tolerate any XML errors; now it will try fetching the feed as HTML as a fallback - Bug 1746749
FIXED - Moving multiple IMAP folders didn't work - Bug 589008
FIXED - Copying an embedded image didn't work under certain circumstances - Bug 1760365
FIXED - ... and a few more: Comma in detached file name (Bug 350825), Charset forward detection (Bug 1737245), Charset detection (Bug 1746695)

New in Betterbird 102.8.0 (Feb 14, 2023)

Based on Thunderbird 102.8.0, release notes.
Fixed in this version:
NEW - Short date entry in Calendar with formats DD, DDMM, DDMMYY and DDMMYYYY, for example 0505 to mean the 5th of May of the current year
FIXED - Command line couldn't handle file: URL, for example: -url file:///home/user/import.ics - Bug 1816343
Fixed in Betterbird, not fixed in Thunderbird 102.8.0 yet:
Fixes provided by the Betterbird project and integrated into Thunderbird to be released later
FIXED - Subscribe/Unsubscribe buttons didn't check/uncheck the respective checkbox for the folder) (fixed in 102.7.1) - Bug 1813346
CHANGED - Selecting or unselecting a dictionary in the editor context menu doesn't close the menu (fixed in 102.0) - Bug 1761417
FIXED - Various problems when saving the compose window as file (fixed in 91.9.1) - Bug 1676825
FIXED - Status text sometimes displayed "null" (fixed in 91.9.0) - Bug 1766578
FIXED - .startup-incomplete not deleted from profile (fixed in 91.8.0) - Bug 1762043
FIXED - Inserting links with spaces gave random erroneous results (fixed in 91.0) - Bug 1563452
Various minor fixes that Thunderbird ins't shipping yet:
NEW - New preferences mail.biff.show_tray_icon_always to always show the system tray icon (in Betterbird effective for Windows and Linux) - Bug 1727874
FIXED - Cropping of subject lines with UTF-8 emoticons - Bug 1799093
FIXED - Send progress dialogue collapsed when sending encrypted message - Bug 1777788
CHANGED - Pref mail.smime.remind_encryption_possible set to true enabling the notification for possible S/MIME encryption - Bug 1808295
Other fixes: Bug 1528297, Bug 1708320, Bug 1782415, Bug 1783517, Bug 1790619, Bug 1793313, Bug 1794117, Bug 1794180, Bug 1798597, Bug 1802685
Fixed in prior 102.x versions (Betterbird specific):
CHANGED - Improved portable launcher. Can now be registered as default mail application on Windows. (fixed in 102.7.1)
CHANGED - Update check will now handle failure better (fixed in 102.6.1)
CHANGED - Followed Thunderbird by adding an "end-of-year donation appeal" (fixed in 102.6.0) - Bug 1801200
CHANGED - Reverted portable laucher to previous version so add-ons start more reliably without setting pref extensions.startupScanScopes to 5 or 7 (fixed in 102.5.1)
NEW - Re-enable additional languages (via Betterbird language packs) and language switching in the settings (fixed in 102.3.0)
NEW - Thunderbird language packs which are incompatible with Betterbird can no longer be installed (fixed in 102.3.0)
CHANGED - WM_CLASS on Linux is now "betterbird" (fixed in 102.3.0)
Features and fixes exclusive to Betterbird (new in the 102 series):
NEW - Regular expressions in search terms (folder search and filters) (fixed in 102.7.1) - Bug 19442
NEW (Linux) - System tray support for Linux (fixed in 102.7.0) - Bug 18732
NEW - Insert menu for plain text compositions (fixed in 102.7.0) - Bug 230684
FIXED (Mac) - Dragging a message to the desktop didn't work (fixed in 102.7.0) - Bug 1455429
FIXED - Problems with invalid S/MIME signatures on servers which add empty lines (fixed in 102.6.1) - Bug 1805558
FIXED better - Multiple spellcheck dictionaries not reliably set in new composition and not restored when editing draft (fixed in 102.6.1) - Bug 1775376
NEW - Restored Unix Movemail support (Linux and macOS) (pending GitHub #104) (fixed in 102.5.1) - Bug 1728778 Bug 1802145
FIXED - Folder search and search/virtual folder not working when based on more than 500 folders, also causing MSF file loss (fixed in 102.5.0) - Bug 1554188
FIXED - Status display "Searching..." not cleared when messages loaded for search/virtual folder (fixed in 102.5.0) - Bug 561328
NEW - More menu options for selecting multi-line view: All folders, individual folders, switched off (fixed in 102.3.1)
FIXED - "Open in Conversation" not present on menus when collapsed thread was selected (fixed in 102.3.1) - Bug 668491
FIXED - Fix drag of image from MyPhoneExplorer (MPE) to compose window (fixed in 102.3.0) - Bug 1790291
NEW - Added non-breaking hyphen (U+2011) and em-dash (U+2014) to "Insert Character/Symbol" menu (en-dash was added previously) (fixed in 102.2.1)
FIXED - Compositions using "fixed width" text at a non-default size erroneously downgraded to plain text (fixed in 102.2.0 )- Bug 1786162
NEW - By popular demand, the multi-line view now also supports threading (fixed in 102.0)
CHANGED - Better styling for summary lines in "grouped by" multi-line views (fixed in 102.0)
NEW - Option to send message as HTML or plain text, depending on whether rich formatting is used (fixed in 102.0)
CHANGED - Unlike Thunderbird, Betterbird does not use a threaded view for new folders (preference mailnews.default_view_flags, 0 = normal, 1 = threaded) (fixed in 102.0)
FIXED - Some disturbing error console messages (fixed in 102.0) - Bug 1744944
FIXED - Multiple spellcheck dictionaries not reliably set in new composition and not restored when editing draft (fixed in 102.0) - Bug 1775376
Features and fixes exclusive to Betterbird (already in the 91 series):
NEW - Multi-line view. View > Layout > Multi-line View On All Folders or per folder in the column picker
NEW - Search terms now allow for complex expressions by adding a group feature - Bug 297852
NEW - Quick Filter untagged messages - Bug 683809
FIXED - Global search in encrypted messages (needs to be enabled in preferences) - Bug 188988
NEW - Regular folder search and Quick Filter in encrypted messages - Bug 1562737
CHANGED - Windows system tray ("systray") tooltip now showing list folders with new messages - Bug 1721063
NEW - Context menu in a news message now includes "Open Message For ID" (message pane only, not in message in tab)
FIXED - New posts in ignored threads caused "phantom" unread messages. "Mark > Thread As Read" will fix corruption - Bug 799040
NEW - Preferences mail.addressDisplayAuthor and mail.addressDisplayRecipients (1 = name, 2 = e-mail, 3 = both) for message list display - Bug 697031
NEW - Showing file URL for detached attachments, correct size and strike-through for deleted files - Bug 1740956, Bug 1741093
NEW - Folder context menu now offers to set folder as startup folder (instead of last visited)
NEW - Add Recent menu to allow attaching recently used files (Windows only) - Bug 1560737
FIXED - Issues when dragging Windows shell link (.lnk) or folder to Write (compose) window Bug 276869, Bug 524874
CHANGED - Activity manager opens in tab
FIXED - Attachments saved via double-click didn't get listed in the list of saved files (Ctrl+J) Bug 1744709
NEW - Ctrl+Shift+Space inserts NBSP now, also mostly fixes "automatic" unwanted NBSP replacement - Bug 532712
FIXED - Copying NBSP replaced NBSP with regular space (fixed in 91.8.0) - Bug 359303, Bug 1769534
FIXED - Repair Text Encoding didn't repair the subject - Bug 1739609
Not mentioned in the front page feature table:
NEW - Preference mail.openpgp.ignore_missing_mdc to allow display of attachments with missing MDC - Bug 1729221
NEW - Added preference mail.biff.show_for_server to optionally suppress biff notifications for server root folders.
FIXED - Subject change with "new subject (was: old subject)" didn't work - Bug 1680425
FIXED - Feed reader didn't tolerate any XML errors; now it will try fetching the feed as HTML as a fallback - Bug 1746749
FIXED - Moving multiple IMAP folders didn't work - Bug 589008
FIXED - Copying an embedded image didn't work under certain circumstances - Bug 1760365
FIXED - ... and a few more: Comma in detached file name (Bug 350825), Charset forward detection (Bug 1737245), Charset detection (Bug 1746695)

New in Betterbird 102.7.1 (Feb 2, 2023)

Based on Thunderbird 102.7.1:
Fixed in this version:
NEW - Regular expressions in search terms (folder search and filters) - Bug 19442
CHANGED - Improved portable launcher. Can now be registered as default mail application on Windows.
FIXED - Fixed issue logging onto Microsoft mail services (for example Office365) using OAuth2. Also please read Thunderbird's blog post on the matter. - Bug 1810760
FIXED - Subscribe/Unsubscribe buttons didn't check/uncheck the respective checkbox for the folder) - Bug 1813346
Fixed in Betterbird, not fixed in Thunderbird 102.7.1 yet:
Fixes provided by the Betterbird project and integrated into Thunderbird to be released later
CHANGED - Selecting or unselecting a dictionary in the editor context menu doesn't close the menu (fixed in 102.0) - Bug 1761417
FIXED - Various problems when saving the compose window as file (fixed in 91.9.1) - Bug 1676825
FIXED - Status text sometimes displayed "null" (fixed in 91.9.0) - Bug 1766578
FIXED - .startup-incomplete not deleted from profile (fixed in 91.8.0) - Bug 1762043
FIXED - Inserting links with spaces gave random erroneous results (fixed in 91.0) - Bug 1563452
Various minor fixes that Thunderbird ins't shipping yet:
NEW - New preferences mail.biff.show_tray_icon_always to always show the system tray icon (in Betterbird effective for Windows and Linux) - Bug 1727874
FIXED - Cropping of subject lines with UTF-8 emoticons - Bug 1799093
FIXED - Send progress dialogue collapsed when sending encrypted message - Bug 1777788
CHANGED - Pref mail.smime.remind_encryption_possible set to true enabling the notification for possible S/MIME encryption - Bug 1808295
Other fixes: Bug 1528297, Bug 1708320, Bug 1782415, Bug 1783517, Bug 1793313, Bug 1794180, Bug 1798597, Bug 1806245, Bug 1802685, Bug 1806245
Fixed in prior 102.x versions (Betterbird specific):
CHANGED - Update check will now handle failure better (fixed in 102.6.1)
CHANGED - Followed Thunderbird by adding an "end-of-year donation appeal" (fixed in 102.6.0) - Bug 1801200
CHANGED - Reverted portable laucher to previous version so add-ons start more reliably without setting pref extensions.startupScanScopes to 5 or 7 (fixed in 102.5.1)
NEW - Re-enable additional languages (via Betterbird language packs) and language switching in the settings (fixed in 102.3.0)
NEW - Thunderbird language packs which are incompatible with Betterbird can no longer be installed (fixed in 102.3.0)
CHANGED - WM_CLASS on Linux is now "betterbird" (fixed in 102.3.0)
Features and fixes exclusive to Betterbird (new in the 102 series):
NEW (Linux) - System tray support for Linux (fixed in 102.7.0) - Bug 18732
NEW - Insert menu for plain text compositions (fixed in 102.7.0) - Bug 230684
FIXED (Mac) - Dragging a message to the desktop didn't work (fixed in 102.7.0) - Bug 1455429
FIXED - Problems with invalid S/MIME signatures on servers which add empty lines (fixed in 102.6.1) - Bug 1805558
FIXED better - Multiple spellcheck dictionaries not reliably set in new composition and not restored when editing draft (fixed in 102.6.1) - Bug 1775376
NEW - Restored Unix Movemail support (Linux and macOS) (pending GitHub #104) (fixed in 102.5.1) - Bug 1728778 Bug 1802145
FIXED - Folder search and search/virtual folder not working when based on more than 500 folders, also causing MSF file loss (fixed in 102.5.0) - Bug 1554188
FIXED - Status display "Searching..." not cleared when messages loaded for search/virtual folder (fixed in 102.5.0) - Bug 561328
NEW - More menu options for selecting multi-line view: All folders, individual folders, switched off (fixed in 102.3.1)
FIXED - "Open in Conversation" not present on menus when collapsed thread was selected (fixed in 102.3.1) - Bug 668491
FIXED - Fix drag of image from MyPhoneExplorer (MPE) to compose window (fixed in 102.3.0) - Bug 1790291
NEW - Added non-breaking hyphen (U+2011) and em-dash (U+2014) to "Insert Character/Symbol" menu (en-dash was added previously) (fixed in 102.2.1)
FIXED - Compositions using "fixed width" text at a non-default size erroneously downgraded to plain text (fixed in 102.2.0 )- Bug 1786162
NEW - By popular demand, the multi-line view now also supports threading (fixed in 102.0)
CHANGED - Better styling for summary lines in "grouped by" multi-line views (fixed in 102.0)
NEW - Option to send message as HTML or plain text, depending on whether rich formatting is used (fixed in 102.0)
CHANGED - Unlike Thunderbird, Betterbird does not use a threaded view for new folders (preference mailnews.default_view_flags, 0 = normal, 1 = threaded) (fixed in 102.0)
FIXED - Some disturbing error console messages (fixed in 102.0) - Bug 1744944
FIXED - Multiple spellcheck dictionaries not reliably set in new composition and not restored when editing draft (fixed in 102.0) - Bug 1775376
Features and fixes exclusive to Betterbird (already in the 91 series):
NEW - Multi-line view. View > Layout > Multi-line View On All Folders or per folder in the column picker
NEW - Search terms now allow for complex expressions by adding a group feature - Bug 297852
NEW - Quick Filter untagged messages - Bug 683809
FIXED - Global search in encrypted messages (needs to be enabled in preferences) - Bug 188988
NEW - Regular folder search and Quick Filter in encrypted messages - Bug 1562737
CHANGED - Windows system tray ("systray") tooltip now showing list folders with new messages - Bug 1721063
NEW - Context menu in a news message now includes "Open Message For ID" (message pane only, not in message in tab)
FIXED - New posts in ignored threads caused "phantom" unread messages. "Mark > Thread As Read" will fix corruption - Bug 799040
NEW - Preferences mail.addressDisplayAuthor and mail.addressDisplayRecipients (1 = name, 2 = e-mail, 3 = both) for message list display - Bug 697031
NEW - Showing file URL for detached attachments, correct size and strike-through for deleted files - Bug 1740956, Bug 1741093
NEW - Folder context menu now offers to set folder as startup folder (instead of last visited)
NEW - Add Recent menu to allow attaching recently used files (Windows only) - Bug 1560737
FIXED - Issues when dragging Windows shell link (.lnk) or folder to Write (compose) window - Bug 276869, Bug 524874
CHANGED - Activity manager opens in tab
FIXED - Attachments saved via double-click didn't get listed in the list of saved files (Ctrl+J) - Bug 1744709
NEW - Ctrl+Shift+Space inserts NBSP now, also mostly fixes "automatic" unwanted NBSP replacement - Bug 532712
FIXED - Copying NBSP replaced NBSP with regular space (fixed in 91.8.0) - Bug 359303, Bug 1769534
FIXED - Repair Text Encoding didn't repair the subject - Bug 1739609
Not mentioned in the front page feature table:
NEW - Preference mail.openpgp.ignore_missing_mdc to allow display of attachments with missing MDC - Bug 1729221
NEW - Added preference mail.biff.show_for_server to optionally suppress biff notifications for server root folders.
FIXED - Subject change with "new subject (was: old subject)" didn't work - Bug 1680425
FIXED - Feed reader didn't tolerate any XML errors; now it will try fetching the feed as HTML as a fallback - Bug 1746749
FIXED - Moving multiple IMAP folders didn't work - Bug 589008
FIXED - Copying an embedded image didn't work under certain circumstances - Bug 1760365
FIXED - ... and a few more: Comma in detached file name (Bug 350825), Charset forward detection (Bug 1737245), Charset detection (Bug 1746695)

New in Betterbird 102.7.1 Preview (Jan 25, 2023)

New in Betterbird 102.7.0 (Jan 17, 2023)

102.7.0-bb28 (16 January 2023)
"Replacement build" FIXED - Fixed issue logging on to Microsoft mail services (for example Office365) using OAuth2 - Bug 1810760
NEW - New preferences mail.biff.show_tray_icon_always to always show the system tray icon (in Betterbird effective for Windows and Linux) - Bug 1727874
Fixed in this version:
NEW (Linux) - System tray support for Linux - Bug 18732
NEW - Insert menu for plain text compositions - Bug 230684
FIXED (Mac) - Dragging a message to the desktop didn't work - Bug 1455429
Fixed in Betterbird, not fixed in Thunderbird 102.7.0 yet:
Fixes provided by the Betterbird project and integrated into Thunderbird to be released later
CHANGED - Selecting or unselecting a dictionary in the editor context menu doesn't close the menu (fixed in 102.0) - Bug 1761417
FIXED - Various problems when saving the compose window as file (fixed in 91.9.1) - Bug 1676825
FIXED - Status text sometimes displayed "null" (fixed in 91.9.0) - Bug 1766578
FIXED - .startup-incomplete not deleted from profile (fixed in 91.8.0) - Bug 1762043
FIXED - Inserting links with spaces gave random erroneous results (fixed in 91.0) - Bug 1563452
Various minor fixes that Thunderbird ins't shipping yet:
FIXED - Cropping of subject lines with UTF-8 emoticons - Bug 1799093
FIXED - Send progress dialogue collapsed when sending encrypted message - Bug 1777788
CHANGED - Pref mail.smime.remind_encryption_possible set to true enabling the notification for possible S/MIME encryption - Bug 1808295
Other fixes: Bug 1528297, Bug 1708320, Bug 1782415, Bug 1783517, Bug 1793313, Bug 1794180, Bug 1798597, Bug 1806245, Bug 1802685, Bug 1805808, Bug 1806245, Bug 1807200
Fixed in prior 102.x versions (Betterbird specific):
CHANGED - Update check will now handle failure better (fixed in 102.6.1)
CHANGED - Followed Thunderbird by adding an "end-of-year donation appeal" (fixed in 102.6.0) - Bug 1801200
CHANGED - Reverted portable laucher to previous version so add-ons start more reliably without setting pref extensions.startupScanScopes to 5 or 7 (fixed in 102.5.1)
NEW - Re-enable additional languages (via Betterbird language packs) and language switching in the settings (fixed in 102.3.0)
NEW - Thunderbird language packs which are incompatible with Betterbird can no longer be installed (fixed in 102.3.0)
CHANGED - WM_CLASS on Linux is now "betterbird" (fixed in 102.3.0)
Features and fixes exclusive to Betterbird (new in the 102 series):
FIXED - Problems with invalid S/MIME signatures on servers which add empty lines (fixed in 102.6.1) - Bug 1805558
FIXED better - Multiple spellcheck dictionaries not reliably set in new composition and not restored when editing draft (fixed in 102.6.1) - Bug 1775376
NEW - Restored Unix Movemail support (Linux and macOS) (pending GitHub #104) (fixed in 102.5.1) - Bug 1728778 Bug 1802145
FIXED - Folder search and search/virtual folder not working when based on more than 500 folders, also causing MSF file loss (fixed in 102.5.0) - Bug 1554188
FIXED - Status display "Searching..." not cleared when messages loaded for search/virtual folder (fixed in 102.5.0) - Bug 561328
NEW - More menu options for selecting multi-line view: All folders, individual folders, switched off (fixed in 102.3.1)
FIXED - "Open in Conversation" not present on menus when collapsed thread was selected (fixed in 102.3.1) - Bug 668491
FIXED - Fix drag of image from MyPhoneExplorer (MPE) to compose window (fixed in 102.3.0) - Bug 1790291
NEW - Added non-breaking hyphen (U+2011) and em-dash (U+2014) to "Insert Character/Symbol" menu (en-dash was added previously) (fixed in 102.2.1)
FIXED - Compositions using "fixed width" text at a non-default size erroneously downgraded to plain text (fixed in 102.2.0 )- Bug 1786162
NEW - By popular demand, the multi-line view now also supports threading (fixed in 102.0)
CHANGED - Better styling for summary lines in "grouped by" multi-line views (fixed in 102.0)
NEW - Option to send message as HTML or plain text, depending on whether rich formatting is used (fixed in 102.0)
CHANGED - Unlike Thunderbird, Betterbird does not use a threaded view for new folders (preference mailnews.default_view_flags, 0 = normal, 1 = threaded) (fixed in 102.0)
FIXED - Some disturbing error console messages (fixed in 102.0) - Bug 1744944
FIXED - Multiple spellcheck dictionaries not reliably set in new composition and not restored when editing draft (fixed in 102.0) - Bug 1775376
Features and fixes exclusive to Betterbird (already in the 91 series):
NEW - Multi-line view. View > Layout > Multi-line View On All Folders or per folder in the column picker
NEW - Search terms now allow for complex expressions by adding a group feature - Bug 297852
NEW - Quick Filter untagged messages - Bug 683809
FIXED - Global search in encrypted messages (needs to be enabled in preferences) - Bug 188988
NEW - Regular folder search and Quick Filter in encrypted messages - Bug 1562737
CHANGED - Windows system tray ("systray") tooltip now showing list folders with new messages - Bug 1721063
NEW - Context menu in a news message now includes "Open Message For ID" (message pane only, not in message in tab)
FIXED - New posts in ignored threads caused "phantom" unread messages. "Mark > Thread As Read" will fix corruption - Bug 799040
NEW - Preferences mail.addressDisplayAuthor and mail.addressDisplayRecipients (1 = name, 2 = e-mail, 3 = both) for message list display - Bug 697031
NEW - Showing file URL for detached attachments, correct size and strike-through for deleted files - Bug 1740956, Bug 1741093
NEW - Folder context menu now offers to set folder as startup folder (instead of last visited)
NEW - Add Recent menu to allow attaching recently used files (Windows only) - Bug 1560737
FIXED - Issues when dragging Windows shell link (.lnk) or folder to Write (compose) window - Bug 276869, Bug 524874
CHANGED - Activity manager opens in tab
FIXED - Attachments saved via double-click didn't get listed in the list of saved files (Ctrl+J) - Bug 1744709
NEW - Ctrl+Shift+Space inserts NBSP now, also mostly fixes "automatic" unwanted NBSP replacement - Bug 532712
FIXED - Copying NBSP replaced NBSP with regular space (fixed in 91.8.0) - Bug 359303, Bug 1769534
FIXED - Repair Text Encoding didn't repair the subject - Bug 1739609
Not mentioned in the front page feature table:
NEW - Preference mail.openpgp.ignore_missing_mdc to allow display of attachments with missing MDC - Bug 1729221
NEW - Added preference mail.biff.show_for_server to optionally suppress biff notifications for server root folders.
FIXED - Subject change with "new subject (was: old subject)" didn't work - Bug 1680425
FIXED - Feed reader didn't tolerate any XML errors; now it will try fetching the feed as HTML as a fallback - Bug 1746749
FIXED - Moving multiple IMAP folders didn't work - Bug 589008
FIXED - Copying an embedded image didn't work under certain circumstances - Bug 1760365
FIXED - ... and a few more: Comma in detached file name (Bug 350825), Charset forward detection (Bug 1737245), Charset detection (Bug 1746695)

New in Betterbird 102.6.1 (Jan 6, 2023)

Fixed in this version:
CHANGED - Further changes to handling of virtual folders - Bug 1554188
CHANGED - Followed Thunderbird by adding an "end-of-year donation appeal" - Bug 1801200
Fixed in prior 102.x versions (Betterbird specific):
NEW - Re-enable additional languages (via Betterbird language packs) and language switching in the settings (fixed in 102.3.0)
NEW - Thunderbird language packs which are incompatible with Betterbird can no longer be installed (fixed in 102.3.0)
CHANGED - WM_CLASS on Linux is now "betterbird" (fixed in 102.3.0)
CHANGED - Reverted portable laucher to previous version so add-ons start more reliably without setting pref extensions.startupScanScopes to 5 or 7 (fixed in 102.5.1)
Fixed in Betterbird, not fixed in Thunderbird 102.6.0 yet:
Fixes provided by the Betterbird project and integrated into Thunderbird to be released later
FIXED - Potential massive loss of MSF files when folder cache (folderCache.json) is (re-)build, for example when moving the profile or adding folders from backup (fixed in 102.5.0 )- Bug 1800202
CHANGED - Selecting or unselecting a dictionary in the editor context menu doesn't close the menu (fixed in 102.0) - Bug 1761417
FIXED - Various problems when saving the compose window as file (fixed in 91.9.1) - Bug 1676825
FIXED - Status text sometimes displayed "null" (fixed in 91.9.0) - Bug 1766578
FIXED - .startup-incomplete not deleted from profile (fixed in 91.8.0) - Bug 1762043
FIXED - Copying NBSP replaced NBSP with regular space (fixed in 91.8.0) - Bug 359303, Bug 1769534
Various minor Thunderbird fixes shipped early: Bug 1708320, Bug 1735803, Bug 1777276, Bug 1782415, Bug 1783517, Bug 1793313, Bug 1794180, Bug 1798597, Bug 1802685
Features and fixes exclusive to Betterbird (new in the 102 series):
NEW - Restored Unix Movemail support (Linux and macOS) (pending GitHub #104) (fixed in 102.5.1) - Bug 1728778 Bug 1802145
FIXED - Folder search and search/virtual folder not working when based on more than 500 folders, also causing MSF file loss (fixed in 102.5.0) - Bug 1554188
FIXED - Status display "Searching..." not cleared when messages loaded for search/virtual folder (fixed in 102.5.0) - Bug 561328
NEW - More menu options for selecting multi-line view: All folders, individual folders, switched off (fixed in 102.3.1)
FIXED - "Open in Conversation" not present on menus when collapsed thread was selected (fixed in 102.3.1) - Bug 668491
FIXED - Fix drag of image from MyPhoneExplorer (MPE) to compose window (fixed in 102.3.0) - Bug 1790291
NEW - Added non-breaking hyphen (U+2011) and em-dash (U+2014) to "Insert Character/Symbol" menu (en-dash was added previously) (fixed in 102.2.1)
FIXED - Compositions using "fixed width" text at a non-default size erroneously downgraded to plain text (fixed in 102.2.0 )- Bug 1786162
NEW - By popular demand, the multi-line view now also supports threading (fixed in 102.0)
CHANGED - Better styling for summary lines in "grouped by" multi-line views (fixed in 102.0)
NEW - Option to send message as HTML or plain text, depending on whether rich formatting is used (fixed in 102.0)
CHANGED - Unlike Thunderbird, Betterbird does not use a threaded view for new folders (preference mailnews.default_view_flags, 0 = normal, 1 = threaded) (fixed in 102.0)
FIXED - Some disturbing error console messages (fixed in 102.0) - Bug 1744944
FIXED - Multiple spellcheck dictionaries not reliably set in new composition and not restored when editing draft (fixed in 102.0) - Bug 1775376
Features and fixes exclusive to Betterbird (already in the 91 series):
NEW - Multi-line view. View > Layout > Multi-line View On All Folders or per folder in the column picker
NEW - Search terms now allow for complex expressions by adding a group feature - Bug 297852
NEW - Quick Filter untagged messages - Bug 683809
FIXED - Global search in encrypted messages (needs to be enabled in preferences) - Bug 188988
NEW - Regular folder search and Quick Filter in encrypted messages - Bug 1562737
CHANGED - Windows systray tooltip now showing list folders with new messages - Bug 1721063
NEW - Context menu in a news message now includes "Open Message For ID" (message pane only, not in message in tab)
FIXED - New posts in ignored threads caused "phantom" unread messages. "Mark > Thread As Read" will fix corruption - Bug 799040
NEW - Preferences mail.addressDisplayAuthor and mail.addressDisplayRecipients (1 = name, 2 = e-mail, 3 = both) for message list display - Bug 697031
NEW - Showing file URL for detached attachments, correct size and strike-through for deleted files - Bug 1740956, Bug 1741093
NEW - Folder context menu now offers to set folder as startup folder (instead of last visited)
NEW - Add Recent menu to allow attaching recently used files (Windows only) - Bug 1560737
FIXED - Issues when dragging Windows shell link (.lnk) or folder to Write (compose) window - Bug 276869, Bug 524874
CHANGED - Activity manager opens in tab
FIXED - Attachments saved via double-click didn't get listed in the list of saved files (Ctrl+J) - Bug 1744709
NEW - Ctrl+Shift+Space inserts NBSP now, also mostly fixes "automatic" unwanted NBSP replacement - Bug 532712
FIXED - Inserting links with spaces gave random erroneous results - Bug 1563452
FIXED - Repair Text Encoding didn't repair the subject - Bug 1739609
Not mentioned in the front page feature table:
NEW - Preference mail.openpgp.ignore_missing_mdc to allow display of attachments with missing MDC - Bug 1729221
NEW - Added preference mail.biff.show_for_server to optionally suppress biff notifications for server root folders.
FIXED - Subject change with "new subject (was: old subject)" didn't work - Bug 1680425
FIXED - Feed reader didn't tolerate any XML errors; now it will try fetching the feed as HTML as a fallback - Bug 1746749
FIXED - Moving multiple IMAP folders didn't work - Bug 589008
FIXED - Copying an embedded image didn't work under certain circumstances - Bug 1760365
FIXED - ... and a few more: Comma in detached file name (Bug 350825), Charset forward detection (Bug 1737245), Charset detection (Bug 1746695)