Recently Updated Extensions
Reinstates the extensions.checkCompatibility preference without respect to the current application version.
Automatically set environment variables based on preferences.
Get before Send Requires Restart
Get messages for the account which is bound to the identity then send the message when you click the toolbar button or the menu item. If your SMTP sever authenticates using POP(IMAP) before SMTP, the extension is useful.
Keyword Highlight Requires Restart
Keywordhighlight changes color/size/weight of your favorite keywords...
Archived Link Requires Restart
Archived Link displays the URL of the Archived-At email message header field (RFC-5064) as a hyperlink.
No Alt Text Requires Restart
Changes the default setting for new images to not use alternative text. This also works around a bug in some versions of SeaMonkey Composer and Thunderbird Message Compose whereby the Image Properties dialog would always demand alt text.
LookOut Requires Restart
LookOut is a plugin which allows Thunderbird to interface with Microsoft's mail tools by decoding metadata and attachments encapsulated/embedded in a TNEF encoded attachment (aka winmail.dat).
Resize Header Requires Restart
An addon to let you resize the message header pane.
Open As Webfolder Requires Restart
Open pages and links in Windows WebFolder WebDAV client (similar to "open in Webfolder" checkbox in IE's open...
JSW:O Alert Requires Restart
Receive alerts for "Jet Set Willy: Online" hosted games
Export for Thunderbird & Lightning Launcher Requires Restart
Export for Thunderbird & Lightning is the worldwide unique printing and exporting solution for Mozilla Thunderbird and Lightning for Windows.
Multi lingual user interface: English, German, French and Spanish
Look Up in Dictionary Requires Restart
Looks up a selected word in OS X's Dictionary.app
Free/Busy Requires Restart
Publish free/busy calendar file (*.ifb) via ftp or to a file. View other people's free/busy info in meeting organizer window. Integrate Thunderbird and Outlook calendars without Exchange server.
Is It Compatible? Requires Restart
**Notice: This addon is no longer maintained.** Are your addons compatible with the next version of Firefox? Find out straight from the Addons window! **Version 0.6.0 is available from the Versions page, it was never approved by AMO**
Highlighter Requires Restart
Quickly highlight some text in Thunderbird message composing windows.
dwEasySubject Requires Restart
When you enter a destination, you are editing incomplete address, mailer help you compensate last word by use auto-complete. However, Subject is not used auto-complete. it is enter easy by auto-complete subject line choice sent in the past.
Hide Menubar Requires Restart
Supports to hide Menu Bar automatically, you can press the ALT key to show it temporarily.
SearchWith Requires Restart
Search selected text with various search services...
Eortologio - Greek Namedays Calendar (Thunderbird) Requires Restart
This extension consists of a Greek Orthodox Namedays reminder. It displays in Thunderbird status bar current day's celebrated names.
eCleaner Requires Restart
Clears preferences left by extensions after uninstallation