Protect your privacy. See who's tracking your web browsing and block them with Ghostery.
The first and only download manager/accelerator built inside Firefox!
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!
Fix the web. Gets rid of a site's cookies and LocalStorage as soon as you close its tabs. Protects against trackers and zombie-cookies. Trustworthy services can be whitelisted.
Session Manager saves and restores the state of all or some windows - either when you want it or automatically at startup and after crashes. It can also automatically save the state of open windows individually.
The greatest user script engine on the Internet (a fork of Greasemonkey).
Monitors web pages for updates. Useful for websites that don't provide Atom or RSS feeds.
Allows for easy sending of YouTube videos to an external media player.