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!
Advanced Eyedropper, Color Picker, Gradient Generator and other colorful goodies...
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.
IE Tab - an extension from Taiwan, features: Embedding Internet Explorer in tabs of Mozilla/Firefox...
UnPlug is an extension which lets you save video and audio which is embedded on a webpage - it's a video download tool.
Display all Google services as buttons or as a space-saving dropdown menu next to your address bar. Reach services like Gmail, Google reader, Google maps, Google calendar, and many more in a single click from your browser.
Foobar combines Firefox's search and address bars into one easy-to-use search and navigation bar.
Unique "speed dial" add-on for Firefox that gives you a fast way to to open your favorite sites using keyboard shortcuts. Ctrl + Space invokes the 'Launcher' then a single letter key press opens a specific site. E.g: open Facebook by Ctrl + Space, F
Hides the bookmark toolbar until you move the mouse above it.
A compilation of some of the best Greasemonkey user scripts for YouTube in one interface.
Collections are groups of related add-ons that anyone can create and share.Explore Collections