Miscellaneous

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Contact Photos Requires Restart

Displays contact photos in the message header.

Rated 4 out of 5 stars (26)
910 users
Updated Nov. 23, 2017

Caret Out Requires Restart

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

Rated 5 out of 5 stars (4)
5 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 (61)
186 users
Updated Oct. 21, 2017

Lightbird Requires Restart

Standalone calendar UI for Lightning

Rated 4 out of 5 stars (20)
1,607 users
Updated Aug. 5, 2017

techblocker

Search with Joy! Block Ads While Surfing!

Rated 5 out of 5 stars (3)
26 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 (35)
4 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 (300)
365 users
Updated June 10, 2017

Addons Recent Updates Requires Restart

Show more addons recent updates

Rated 5 out of 5 stars (11)
176 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)
59 users
Updated April 23, 2017

Lightning Requires Restart Featured

Organize your schedule and life's important events in a calendar that's fully integrated with your Thunderbird email. Manage multiple calendars, create your daily to do list, invite friends to events, and subscribe to public calendars.

Rated 3 out of 5 stars (1,941)
6,595,262 users
Updated April 20, 2017

tzpush Requires Restart

Z-Sync to Thunderbird Addressbook
Will sync Thunderbird address book to Zentyal, Zarafa, Horde and outlook.com/hotmail.

Rated 4 out of 5 stars (19)
839 users
Updated April 16, 2017

MyAdFilter

With MyAdFilter, free content creators propose you only one ad. Apart from those, as your usual ad-blocker, MyAdFilter disables all ads.

Not yet rated
18 users
Updated March 30, 2017

OverbiteFF Requires Restart

Add legacy protocol support back to Firefox and SeaMonkey with OverbiteFF, which restores support for Gopher servers, plus CSO/ph searches, finger, whois and more! Cross-platform JavaScript runs anywhere Firefox does.

Rated 5 out of 5 stars (22)
61 users
Updated March 14, 2017

Session Manager

Session Manager saves and restores the state of all or some windows - either when you want it or automatically at startup and after crashes. It can also automatically save the state of open windows individually.

Rated 5 out of 5 stars (846)
609 users
Updated Jan. 30, 2017

Extension List Dumper 2 Requires Restart

This extension adds a button ("Dump list") to the Add-ons window. When this button is pressed, a new window is opened with the list of installed extensions, themes or plugins...

Rated 4 out of 5 stars (38)
150 users
Updated Jan. 15, 2017

eBay Template Generator Compatible with Firefox 57+

Generate e-bay templates online - in few minutes.

Rated 4 out of 5 stars (4)
1 user
Updated Jan. 11, 2017

BBCodeXtra Requires Restart

(Sorry, no plans to port this add-on to Webextensions)
BBCodeXtra is an extension, compatible with Mozilla FireFox (up to 57) and Seamonkey, which adds to the context menu new commands to insert BBCode/Html/XHtml codes in an easy and fast way...

Rated 5 out of 5 stars (71)
25 users
Updated Nov. 27, 2016

ChatZilla Requires Restart

A clean, easy to use and highly extensible Internet Relay Chat (IRC) client.

Rated 4 out of 5 stars (150)
25,921 users
Updated Nov. 9, 2016

XDM Hook for Linux & Mac OS X Requires Restart

XDM integration module for Firefox on Linux and Mac

Rated 5 out of 5 stars (2)
1 user
Updated Sept. 30, 2016

Extension Auto-Installer

Important note: This extension will not work in Firefox 57 and above. Providing this functionality in Firefox is no longer possible, the extension is discontinued.

Rated 5 out of 5 stars (48)
98 users
Updated Sept. 15, 2016