It supports Ubuntu 12.04 LTS, Ubuntu 12.10 and Ubuntu 13.04
Canonical announced a few hours ago, September 18, that the brand-new Mozilla Thunderbird 24 email client landed in the Ubuntu 13.04, Ubuntu 12.10 and Ubuntu 12.04 LTS operating systems.Officially unveiled by Mozilla on September 17, 2013, the Mozilla Thunderbird 24 email and newsgroup client introduces the ability to watch or ignore message threads, the ability to send emails to IDN based email addresses, various Chat fixes, better support for Twitter, IRC improvements, and various security fixes.
All Ubuntu 13.04 (Raring Ringtail), Ubuntu 12.10 (Quantal Quetzal), and Ubuntu 12.04 LTS (Precise Pangolin) users can update their Thunderbird email client to version 24.0 right now, using the Update Manager software.
Other Linux users can download Mozilla Thunderbird 24.0 for Linux binaries and sources right now from Softpedia. Also, don't forget to visit our always up-to-date Thunderbird Extensions section for the latest add-ons!