Most Useful Firefox Addons

Multifox is an extension that allows Firefox to connect to websites using different user names. Simultaneously!

ScribeFire Blog Editor enables users to easily drag and drop formatted text from the web into their blog(s), post entries, take notes, and optimize their ad inventory directly through the Firefox browser.

If there are times you want to surf the web without leaving a trace in your local computer, then this is the right extension for you. What it does is temporarily disable the following...

Check the validity of links on any webpage.

FireShot is a Firefox extension that creates screenshots of web pages.
Unlike other extensions, this plugin provides a set of editing and annotation tools, which let users quickly modify captures and insert text and graphical annotations.

Simple app that automatically gives each tab open a different color.

Select any text on any page for one-click access to References, Searches, Conversions, Translations, Email, Blogging & more.

Rearrange or remove menuitems from the main context menu (right-click menu) and main menubar (File Edit View etc.)

Snap Links allows users to easily open multiple links in new tabs by drawing a box around them. Links can also be opened in new windows, new tabs on a new window, copied to clipboard, bookmarked or downloaded.

Add useful extra features and skins to Gmail, like hierarchical labels, macros, file attachment icons, and more.

TwitterFox is a Firefox extension that notifies you of your friends' statuses of Twitter.

Download video files from popular sites like YouTube, Dailymotion, Break.com and more. 100% Free!

Allows you to customize the way a webpage displays using small bits of JavaScript.

Firebug integrates with Firefox to put a wealth of development tools at your fingertips while you browse. You can edit, debug, and monitor CSS, HTML, and JavaScript live in any web page...

FoxyTunes lets you control almost any media player and find lyrics, covers, videos, bios and much more with a click right from your browser.

If you use Firefox on more than one computer, you'll want Foxmarks. Install Foxmarks on each computer, and it will work silently in the background to keep your bookmarks synchronized.

Cooliris Previews gives you the power to browse and share Web links and rich media faster. Just mouse over any link, and the Cooliris preview window immediately appears to show you the content. To email it, just click.

It lets you quickly switch between sidebar panels, view dialog windows such as downloads, extensions, and more in the sidebar, or view source or websites in the sidebar.