Maximize Message Pane is a Thunderbird extension that collapses thread pane.
You can read a message in larger area without opening a new message window.
You can also toggle folder pane.
How to Install in Thunderbird:
1. Right-click the link below and choose "Save Link As..." to download and save the file to your hard disk.
2. In Mozilla Thunderbird, open Add-ons from the Tools menu.
3. Click the Install button, and locate/select the file you downloaded and click "OK".
· Mozilla Thunderbird
What's New in This Release: [ read full changelog ]
· Fixed: message pane becomes half size when un-maximized with wide pane layout
· Fixed: hide message pane button does not toggle
· Fixed: remove DOM mutation event listeners
· Fixed: add prefix to all XUL IDs