Mail Redirect Requires Restart
Allow to redirect (a.k.a. "remail") mail messages to other recipients.
Custom Sender Address and Reply Requires Restart
Select sender mail address based on the recipient and reply with the same address
Flexible Identity Requires Restart
Selects an identity based on the recipients list when sending an email
Year view Requires Restart
Year view for calendar.
AutoCopy_rebirth Requires Restart
Lightweight add-on that automatically copies any highlighted text to clipboard.
ImportExportTools Requires Restart
Adds some tools to import and export folders and messages
Highlighter Requires Restart
Quickly highlight some text in Thunderbird message composing windows.
Join-NG Requires Restart
Join partial messages. Somewhat similar to MS Outlook Express "combine and decode".
PlayFlash 64bit Requires Restart
Flash player plugin - unofficial xpi repack for 64bit browsers. Use when official plugin installer is not suitable. All binary files are copyrighted by their authors and distributed for free.
PlayFlash 32bit Requires Restart
Flash player plugin - unofficial xpi repack for 32bit browsers.
Use when official plugin installer is not suitable.
All binary files are copyrighted by their authors and distributed for free.
CardDAV Browser Requires Restart
A utility to browse vCards stored on a CardDAV server.
Contact Photos Requires Restart
Displays contact photos in the message header.
Caret Out Requires Restart
Mouse Gestures Suite Requires Restart
Mouse gestures for SeaMonkey & Firefox: navigate & execute commands using mouse gestures (with single mouse button) and rocker gestures (by pressing 2 mouse buttons). Also: scroll wheel navigation, page scrolling, tab scrolling.
Lightbird Requires Restart
Standalone calendar UI for Lightning
Search with Joy! Block Ads While Surfing!
AutoProxy-ng Requires Restart
This is a fork of AutoProxy, which can run the latest version of Firefox.
UnMHT allows you to view MHT (MHTML) web archive format files, and save complete web pages, including text and graphics, into a single MHT file in Firefox/SeaMonkey.
Addons Recent Updates Requires Restart
Show more addons recent updates
InfoLister Requires Restart
Lists installed add-ons (extensions, themes, plugins). Mozilla does not allow me to publish the version compatible with Firefox 48+, see http://forums.mozillazine.org/viewtopic.php?f=48&t=2084957&p=14715558#p14715558 for details.