Blocks annoying video ads on YouTube, Facebook ads, banners and much more.
Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).
The best security you can get in a web browser!
Allow active content to run only from sites you trust, and protect yourself against XSS and Clickjacking attacks.
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.
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.
IE Tab - an extension from Taiwan, features: Embedding Internet Explorer in tabs of Mozilla/Firefox...
Control what gets sent as the HTTP Referer on a per-site basis.
Scrolls the page smoothly when scrolling the mouse wheel (or keyboard arrows if enabled).
Allows URI texts written in webpages to be loaded by double clicks.
Cookie Monster provides proactive cookie management on a site or domain level basis, including 3rd party cookies. Via the status bar, it provides easy access to enhanced cookie functionality, while doing so in a non-intrusive manner.
Download videos with comments from Nico Nico Douga and change your video-watching experience!
Bring back your personal and powerful Firefox Button!
GMarks helps you sync & manage your bookmarks with Google Bookmarks...
Collections are groups of related add-ons that anyone can create and share.Explore Collections