Plug-in (computing)

GMarks includes a sidebar, a toolbar, a quick search with Home+Home similar to Google Desktop's Ctrl+Ctrl search, and full content search of your bookmarked pages.

The original Gmail notifier for multiple accounts. Allows you to receive new mail notifications along with viewing account details including unread messages, saved drafts, spam messages, labels with new mail, space used, and new mail snippets.

A collection of resources contributed by the Scala user community

Smart Bookmarks is a Firefox extension that allows you to create smart bookmarks that can access dynamic or hard-to-reach web pages, automate common tasks on the Web, and easily share dynamically-generated content.

Rich, personalized experiences across the web

hoverIntent is a plug-in that attempts to determine the user's intent... like a crystal ball, only with mouse movement! It works like (and was derived from) jQuery's built-in hover. However, instead of immediately calling the onMouseOver function, it waits until the user's mouse slows down enough before making the call.

WiseStamp Firefox extension empowers your email signature on any webmail service (Gmail ,Yahoo Mail ,AOL, Hotmail, Google Apps…) Easily customize, Include IM & Social profiles, Automatically share your Blog posts, Quotes, News, Bookmarks and more… Enhance your personal and business email interactions Get WiseStamp Now