Tidybird Requires Restart
Organize email into folders quickly and easily.
Forumzilla Requires Restart
Forumzilla lets you read news and blog feeds in your email application. It is similar to the feed reader built into Thunderbird, but it lets you download stories into any folder in any POP, IMAP, or local account (configurable per...
UxU - UnitTest.XUL Requires Restart
This is a testing tool for addon developers.
folderplus Requires Restart
This extension adds some basic missing features about folders.
Move mails to their conversation folder. Navigate to folder with new keyboard shortcuts.
X-Unsent support Requires Restart
Adds support for the X-Unsent header.
Grammar Checker Requires Restart
Checks grammar using LanguageTool.
ltnPlus Requires Restart
Support printing of tasks for Lightning 0.8/0.9.
Up to version 0.2:
Enhancements to Lightning that are known from Sunbird: Unifinder (for events and todos) and moving MiniMonth to Tabpanel
Google+ Tab Requires Restart
Google+ Tab for Thunderbird
Resize Header Requires Restart
An addon to let you resize the message header pane.
A button that lists all the about pages that exist. Some of these pages are also provided as separate buttons.
WebPG for Mozilla Requires Restart
An extension which provides GnuPG/GPG/PGP related functions to Moizilla Firefox, Thunderbird and Seamonkey
Free unused memory that Firefox is currently using.
Shedule Filters Requires Restart
Sheduled run message filters
Запуск фильтров сообщений по расписанию
TheRealURL Requires Restart
Get URL information: expand short URLs, get title and content type information without visiting the site.
UPDATE, AUG 2013: THIS EXTENSION IS NO LONGER SUPPORTED. The source is open - if you wish to take on the development, you're welcome.
EmailPicky 4 Requires Restart
Grab email addresses from emails from any selected Email Folder and add them to your contacts. (Email Crawler / Email ID Grabber / Bounced email collector) - Thunderbird Plugin
Note: It doesn't create duplicates, but shows as 'xxx messages added'.
ThunderStats! Your Thunderbird Statistics! Requires Restart
Do you remember the old good Eudora statistics? Do you miss them?
Using this addon you can finally keep an eye on how you use your beloved Thunderbird!
Decide whether to allow or block remote content in messages by comparing the names of the folders in which they are located to configured regular expressions.
Diagnostics tool for Adblock Plus, provides some insight into internal processes of Adblock Plus.
TB Change From and Fcc on Compose Extension Requires Restart
You can now temporarily change the from and fcc on...
Personasizer allows you to expose more of your persona's header image. Useful for personas that have text or an important part of their content cut off by the browser's navigation elements.