Miscellaneous

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Reply to Multiple Messages

Add menu commands for replying to multiple messages at the same time.

Rated 5 out of 5 stars (2)
258 users
Updated Dec. 11, 2017

CardDAV Browser Requires Restart

A utility to browse vCards stored on a CardDAV server.

Rated 3 out of 5 stars (5)
1,152 users
Updated Nov. 24, 2017

Contact Photos Requires Restart

Displays contact photos in the message header.

Rated 4 out of 5 stars (25)
2,452 users
Updated Nov. 23, 2017

gContactSync Requires Restart

Synchronizes contacts & groups between Thunderbird or SeaMonkey and Google Contacts. Imports Facebook friends, contacts you follow on Twitter, and more.

Rated 4 out of 5 stars (228)
88,706 users
Updated Nov. 23, 2017

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.

Rated 5 out of 5 stars (27)
5,115 users
Updated Nov. 20, 2017

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.

Rated 5 out of 5 stars (20)
10,597 users
Updated Nov. 20, 2017

Mail Redirect Requires Restart

Allow to redirect (a.k.a. "remail") mail messages to other recipients.

Rated 4 out of 5 stars (126)
36,355 users
Updated Nov. 17, 2017

Caret Out Requires Restart

Disables change of the caret browse mode by shortcut key(F7).

Rated 5 out of 5 stars (3)
232 users
Updated Nov. 3, 2017

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.

Rated 5 out of 5 stars (59)
12,318 users
Updated Oct. 21, 2017

ToggleReplied Requires Restart

Enables toggling of replied, forwarded, and redirected states of messages.

Rated 4 out of 5 stars (2)
62 users
Updated Oct. 7, 2017

Send Later Requires Restart

True "Send Later" functionality to schedule the time for sending an email.

Rated 5 out of 5 stars (105)
64,109 users
Updated Sept. 26, 2017

Copy Sent to Current Requires Restart

Allows to place a copy of sent messages (aka FCC) into the currently active folder or any other folder you choose, when you create the message. Usually the copies are placed into the 'Sent' folder. For replies, you may also move the original message.

Rated 4 out of 5 stars (67)
3,034 users
Updated Sept. 15, 2017

Thunderbird Integration for JIRA Requires Restart

This is a plugin for Thunderbird 3.3+ which is able to create Atlassian Jira issues out of e-mails or add the content of an e-mail as a comment on an Jira issue.

Rated 4 out of 5 stars (10)
342 users
Updated Sept. 8, 2017

Lightbird Requires Restart

Standalone calendar UI for Lightning

Rated 4 out of 5 stars (18)
3,029 users
Updated Aug. 5, 2017

techblocker

Search with Joy! Block Ads While Surfing!

Rated 5 out of 5 stars (2)
37 users
Updated July 7, 2017

AutoProxy-ng Requires Restart

This is a fork of AutoProxy, which can run the latest version of Firefox.

Rated 5 out of 5 stars (33)
3,563 users
Updated July 4, 2017

UnMHT

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.

Rated 4 out of 5 stars (276)
79,226 users
Updated June 10, 2017

Provider for Google Calendar Requires Restart

Allows bidirectional access to Google Calendar

Rated 4 out of 5 stars (956)
320,315 users
Updated April 26, 2017

Addons Recent Updates Requires Restart

Show more addons recent updates

Rated 5 out of 5 stars (10)
1,108 users
Updated April 24, 2017

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.

Rated 4 out of 5 stars (35)
539 users
Updated April 23, 2017