Extensions by Weekly Downloads
Easy to use youtube video to mp3 downloader
As of Firefox 33, Venkman *no longer works*, as the APIs which it needs have been removed.
Xmarks Sync Requires Restart
Xmarks is the #1 bookmarking and open tab add-on. Keep your bookmarks, and open tabs backed up and synchronized across computers and browsers. Mobile phones with Premium access. Utilize LastPass to sync passwords!
FireGestures Requires Restart Featured
A customizable mouse gestures extension which enables to execute various commands and user scripts with six types of gestures.
Lightbeam for Firefox Featured
Lightbeam is a Firefox add-on that enables you to see the first and third party sites you interact with on the Web. Using interactive visualizations, Lightbeam shows you the relationships between these third parties and the sites you visit.
Easily download most popular video formats.
Theme Font & Size Changer Featured
Theme Font & Size Changer lets you change the global font size and font family used for the user interface in Firefox. Design your browser with your favorite font.
Quickly toggle between blocking all pop-up windows and allowing some pop-ups
Shut down the lights on YouTube.
Advanced Eyedropper, Color Picker, Gradient Generator and other colorful goodies...
Torrent Tornado Requires Restart Featured
Selenium IDE Button Requires Restart
Just one simple toolbar button to open Selenium IDE. You need to have installed Selenium IDE: http://seleniumhq.org/projects/ide/
A very lite YouTube downloader (FLV, WebM, 3GP, and MP4)
Adds a context menu item to send audio/video streams directly to VLC media player
Personas (now known as lightweight themes) 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 themes.
Hide Your IP Address and Unblock Websites for Free with the Hide My IP proxy and VPN IP network. Thousands of IPs around the world to choose from. Access your favorite streaming sites by changing your IP location. No ads or limitations.
Replace video player with Firefox native video player
Click&Clean Requires Restart
The quick and easy way to delete your browsing history, erase all temporary internet files, remove downloaded files history, cookies, Flash LSO, typed URLs. Allows to delete private data when Firefox closes. Supported ext. tools like CCleaner.
Restrict Proxy by Private Windows, Tabs and Domain List