Add-ons
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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.
ProfileSwitcher
Requires Restart
It adds some options to launch easily other profiles and the Profile Manager.
Dorando keyconfig
Requires Restart
A modified Dorando's addon to rebind keyboard shortcuts. It is designed to be a drop-in replacement, keeping your old settings. (See details for upgrade instructions.)
As of version 2016.2, Custom keys (using custom JavaScript) work again!
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.
Profile Folder Button
GPO support For Firefox and Thunderbird
For work with new versions, use autoconfiguration module https://mozillagpo.sourceforge.io/
Firefox and Thunderbird extension to manage user preferences and user profile CA certificates using group policy
AutoProxy-ng
Requires Restart
This is a fork of AutoProxy, which can run the latest version of Firefox.
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.
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.
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.
Restart
Force RTL
More About
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...
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...
Force Addon Status
Requires Restart
Provides ability to change status of specific addon (enabled/disabled).
Just Restart!
Requires Restart
Restart application with Ctrl+Shift+Z.
Timer Fire
Requires Restart
A simple tool to trigger some of the background timers.
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.
To create your own collections, you must have a Mozilla Add-ons account.
