Tab Mix Plus Requires Restart
Tab Mix Plus enhances Firefox's tab browsing capabilities. It includes such features as duplicating tabs, controlling tab focus, tab clicking options, undo closed tabs and windows, plus much more. It also includes a full-featured session manager.
Stylish Requires Restart
Restyle the web with Stylish, a user styles manager. Stylish lets you easily install themes and skins for Google, Facebook, YouTube, Tumblr, and many, many other sites. You can even customize Firefox and other programs themselves.
Classic Theme Restorer Requires Restart
Squared tabs, appmenu, add-on bar, small button view and many more 'old' features for Firefox 29+ (Windows / MacOSX / Linux).
All builds & changelogs on versions page!
FireGestures Requires Restart Featured
A customizable mouse gestures extension which enables to execute various commands and user scripts with six types of gestures.
Easy Access Requires Restart
Allow an easy access to the system commands and other programs in your computer.
Personas (now known as lightweight themes) are free, easy-to-install "skins" for Firefox. Personas Plus extends that built-in functionality to give you even more control and easier access to new, popular, and your own favorite themes.
NOTE: Reddit Enhancement Suite is developed independently, and is not officially endorsed by or affiliated with reddit.
RES is a suite of tools to enhance your reddit browsing experience.
MinimizeToTray revived Requires Restart
Minimizes windows into the system tray.
NoSquint Requires Restart
NoSquint is no longer maintained. :(
All-in-One Sidebar Requires Restart
AiOS lets you open various windows as sidebar panels, and quickly switch between them. So it put an end to the window chaos! In addition to bookmarks and history it opens dialogues such as downloads, add-ons and more in the sidebar.
Status-4-Evar Requires Restart
Status bar widgets and progress indicators for Firefox 4+
Bring your bookmarks into view with just a gesture. Move the sidebar across the screen. Open a different sidebar by just clicking its title. And more! Keeps your sidebar simple and quick to access!
MeasureIt Requires Restart
Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.
Print Edit Requires Restart Featured
Allows editing of web page content while in Print Preview mode, prior to printing or saving as HTML or PDF. Compacts the layout and removes unwanted content such as adverts, sidebars and blank pages. Any element can be formatted, hidden or deleted.
Text Link Requires Restart
Allows URI texts written in webpages to be loaded by double clicks.
Tree Style Tab Requires Restart
Show tabs like a tree.
Theme Font & Size Changer Featured
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.
R-kiosk Requires Restart
Real Kiosk is a Firefox extension that defaults to full screen, disables all menus, toolbars, key commands and right button menus. Alt+Home still takes you home. ...
Gives you a place to put all your add-on buttons without over-crowding the navigation bar.