The first and only download manager/accelerator built inside Firefox!
Restyle the web with Stylish, a user styles manager. Stylish lets you easily install themes and skins for Google, Facebook, YouTube, Orkut, and many, many other sites. You can even customize Firefox and other programs themselves.
The Web Developer extension adds various web developer tools to the browser.
FoxyProxy is an advanced proxy management tool that completely replaces Firefox's limited proxying capabilities. For a simpler tool and less advanced configuration options, please use FoxyProxy Basic.
The User Agent Switcher extension adds a menu and a toolbar button to switch the user agent of a browser.
Capture the whole page or any portion, annotate it with rectangles, circles, arrows, lines and text, blur sensitive info, one-click upload to share. And more!
Advanced Eyedropper, Color Picker, Gradient Generator and other colorful goodies...
Control what gets sent as the HTTP Referer on a per-site basis.
Fixing Thunder, QQ Xuanfeng, Flashget, Rayfile, Namipan, and QQ Temporary Chatting links. Converting URL text of above types on the webpage to a Hyperlink.
Add useful extra features to Gmail, like hierarchical labels, an unread message icon on your browser tab, file attachment icons, and more.
Collections are groups of related add-ons that anyone can create and share.Explore Collections