20 714 753 gebruikers
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).
1 403 154 gebruikers
The first and only download manager/accelerator built inside Firefox!
1 412 270 gebruikers
Protect your privacy. See who's tracking your web browsing and block them with Ghostery.
2 164 688 gebruikers
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.
1 253 925 gebruikers
724 779 gebruikers
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.
378 821 gebruikers
The User Agent Switcher extension adds a menu and a toolbar button to switch the user agent of a browser.
927 382 gebruikers
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.
581 596 gebruikers
The Web Developer extension adds various web developer tools to the browser.
436 490 gebruikers
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!
175 638 gebruikers
View HTTP headers of a page and while browsing.
438 529 gebruikers
Personas 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 Personas.
123 411 gebruikers
Notice: some important features (XML indentation and load old saved requests) are missing in version 2.0.0, please update to version 2.0.1.
Please follow the link ("View other versions") below To install version 2.0.1.