8 Add-ons in this Collection
Greasemonkey by Anthony Lieuallen, Aaron Boodman, others
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...
Stay on top of the information you care about with the Yahoo Toolbar. Preview your favorite sites, like Facebook, Gmail, eBay and more, from any page you’re on.
Add useful extra features to Gmail, like hierarchical labels, an unread message icon on your browser tab, file attachment icons, and more.
Enhance Flickr with a compilation of useful Greasemonkey scripts.
Note from Mozilla: This add-on has been discontinued. Try Forecastfox Weather instead.
Get live, local weather conditions in Firefox with the WeatherBug extension.