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...
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.
Control what gets sent as the HTTP Referer on a per-site basis.
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!
GMarks helps you sync & manage your bookmarks with Google Bookmarks...
Personalize Firefox Button in Firefox 4 and change it to your personal and powerful one!
Create your personalized menu to replace Menu Bar in Firefox 3.
はてなブックマーク用の公式 Firefox アドオンです。はてなブックマーク (http://b.hatena.ne.jp/) は株式会社はてなが提供する、日本国内最大のソーシャル・ブックマークサービスです。会社で見つけたサイトをオンラインにブックマーク、家に帰ってゆっくり見たいというニーズに応えると同時に、ブックマークを他のユーザーと共有し、これまでにない新しい情報体験を提供します。
Collections are groups of related add-ons that anyone can create and share.Explore Collections