Open links, pages, and bookmarks in any other browser, using right-click context menus or with one click of the drop-down or standalone toolbar buttons. Modify any menu, browser name or location. Incognito/private browsing mode is also supported.
Looks up a user selected word in an online...
Paste your email address (or any other text) into text fields.
A compilation of some of the best Greasemonkey user scripts for YouTube in one interface.
Note from Mozilla: This add-on has been discontinued. Try Colorlicious instead.
Change Firefox to Any Color and create your own personalized theme.
Drop files into attachment boxes instead of browse for them or type in the filename. Drop multiple files and fill all the entries. In some websites it allows to add new upload files: in Google Mail is possible to drop the files directly over the...
GetGlue helps you find your next favorite movie, book, or music album. As you visit sites like Amazon, IMDB, and Wikipedia, GetGlue suggest things you'll like.
Search Cloudlet inserts smart tag clouds into Google / Yahoo / Twitter interface to help you search faster. This free productivity-boosting add-on was featured at LifeHacker, PC World, Website Magazine, etc. Install it now to add magic to your search
Search any word on a page via context (right click) menu or from Address Bar shortcuts from a variety of resources, including: Wikipedia, dictionaries, and media sites. Custom preferences allow you to add your own resources, labels and shortcuts.
Subtile is a highly customizable extension to allow people without mozilla development knowledge to create their own (sub)extension, limited to a menu attached to a toolbar button.
Add useful extra features to Google Reader, like feed favicons, inline article previews, and unread counts in your browser tab with Better GReader.
A nifty tool which allows you to clip out portions of webpages and reload them later to check for updates.