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.
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!
IE Tab - an extension from Taiwan, features: Embedding Internet Explorer in tabs of Mozilla/Firefox...
A productive way to organize, read and share the content of your favorite feeds, blogs and news sites. Feedly offers a seamless transition from Google Reader.
View and manage downloads from a tidy statusbar - without the download window getting in the way of your web browsing.
Thanks Tekzilla for your awesome review! Click here to see their video: http://youtu.be/BUDqWrJ-Vao
Allows you to hide almost anything via context menu 'Remove Object'.
Add useful extra features to Gmail, like hierarchical labels, an unread message icon on your browser tab, file attachment icons, and more.
Toggles dictionaries automatically or manually and displays the currently selected one
This extension adds a new "FaviconizeTab" option to the context menu of the tab...
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
Supports to hide Menu Bar automatically, you can press the ALT key to show it temporarily.
This add-on will open the File Browser at the right location, using simple filters on the downloaded file.
The filters are based on filenames and hosted domain's name.