Stylish-Custom Requires Restart
custom additions to Stylish extension
'Classic Toolbar Buttons' add-on restores old toolbar button ui (known from Fx 4-7s small view, Fx 4-12s large view & Tb 5-14) for current Firefox, Thunderbird and Seamonkey versions.
Beta builds on versions page!
Theme Font & Size Changer lets you change the global font size and font family used for the user interface in Firefox. Design your browser with your favorite font.
Simple Locale Switcher Requires Restart
An easier management of the user interface language
Add-on for Firefox and Thunderbird. Replaces built-in notifications with the OS native notifications. It supports most Linux Desktop Environments, Windows 8.1 & 10.
Open With Vivaldi Browser sends pages from Mozilla Firefox to Vivaldi browser.
Right Links Requires Restart
This extension allows to open links in new tabs with right-click directly and using “long” left-click.
This is very useful for touchpads on notebooks and for mice without middle button.
Nightly Tester Tools Requires Restart
Useful tools for the nightly tester.
Restores version numbers for all installed add-ons inside Add-on Manager on Firefox, Thunderbird and Seamonkey.
Flexible Sidebar allows to change sidebar width by dragging the handles.
Restart Application Button lets you restart your Firefox and SeaMonkey application by a quick toolbar button click.
Keeps track of your browser tab number.
Password Tags Requires Restart
Adds metadata and sortable tags to the password manager.
Menu Wizard Requires Restart
Customize menus : Helps removing, moving and renaming menus and menu items
Colorize important menu for ease of use! (use Style (CSS))
Change or disable any of used keyboard shortcuts
Support: Firefox, Thunderbird and SeaMonkey
Adds icons to buttons and/or menus.
GNOMErunner Options Requires Restart
Allows to customize GNOMErunner theme
Speed Dial & Start Page with flexible layout for fast access to sites via visual bookmarks
QuickFolders (Tabbed Folders) Requires Restart
The "Swiss army knife" of folders. Turn your favorites into tabs - open folders and subfolders, move mails without scrolling around or searching. powerful + easy.
See new mail at a glance after automatic filtering - supports quickFilters addon!
Active Stop Button Requires Restart
Stop gif animation with button, context menu or Esc key
The "Responsible Blocker" arrives to save the Internet, this extension blocks all those annoying ads, but allows only small and acceptable ads, so the websites you like can continue online.
The "Responsible Blocker" arrives to save the Internet