The easy way to download and convert Web videos from hundreds of YouTube-like sites.
NOTE: Xmarks lives! Learn more at http://blog.xmarks.com . Xmarks is the #1 bookmarking add-on. Keep your bookmarks, passwords and open tabs backed up and synchronized across computers and browsers.
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.
Open Bookmarks/History/Homepage/URL/Search in new tabs, and more utilities for tabbed browsing, including Protect/Lock/Faviconize/Unload Tab, Reload Every, Select and manipulate multiple tabs simultaneously, Tab Stacking/Coloring, etc.
Il tuo browser in 3D! FoxTab ti offre un'innovativa funzionaltà 3D per il tuo Firefox!
New Tab King is the premier extension for turning your new tab page into a beacon of productivity and efficiency.
Featuring a todo list, recently closed tabs, most visited pages and more!
Tons of visual customization option too!
Add useful extra features to Gmail, like hierarchical labels, an unread message icon on your browser tab, file attachment icons, and more.
HideTab is a simple Firefox extension to hide/unhide individual tabs.
Note from Mozilla: This add-on has been discontinued. Try Roomy Bookmarks Toolbar instead.