There are thousands of Firefox Extensions on the web, which one you prefer? I would like to share with all of you the list of my favorite Firefox Extensions. I personally prefer Firefox than other web browser because of its extensibility, i can download additional extensions, add-ins that give all kinds of cool new features, or uninstall extensions easily if i do not like them.

Cooliris Previews
Cooliris Previews is a extension to preview links without clicking or leaving your current page. It gives you the power to browse faster by mousing over an icon next to a link, and you can view every result link instantly.

del.icio.us
del.icio.us integrates your browser with http://del.icio.us, the leading social bookmarking service on the Web for storing, sharing and discovering web bookmarks. It allows you to easily bookmark webpages in del.icio.us, from within the Firefox browser and provides extra options such as right-click menu and highlight text to add notes.

StumbleUpon
This extension adds a StumbleUpon toolbar to Firefox. StumbleUpon is a collaborative surfing tool for browsing, reviewing and sharing great sites with like-minded people.
Clipmarks
Clipmarks is a extension to clip a paragraph, sentence, image or video, without having to bookmark the entire page. You can send and share the clips with friends on Clipmarks site.

ForecastFox

ForecastFox brings an international weather from AccuWeather.com to your Firefox web browser status bar. You can customize to display information you want, including a radar image button, severe weather warnings and extended forecasts of up to eight days.

Answers
Answers comes from answers.com. It provides reliable facts and definitions from over 100 dictionaries, encyclopedias and almanacs without having to search through lists of search engine links.

Scribefire (previously called Performancing for Firefox)
For bloggers, Scribefire is a must-have extension. It is a full featured blog editor inside your Firefox browser and lets you post to your blog easily. more…

Foxmarks Bookmarks Synchronizer
Foxmarks Bookmarks Synchronizer is useful when you have more than one computer and you want to keep all your bookmarks synchronize. It works silently in the background to keep your bookmarks synchronized and also lets you access your bookmarks from any computer anytime via my.foxmarks.com. more…

Firebug
Firebug is an essential tool for developers. Firebug is the development tools at your fingertips while you browse. It allows you to examine and tweak the HTML, CSS and JavaScript contained in a page.

Sage
Sage is a nice lightweight RSS and Atom feed aggregator extension for Mozilla Firefox. Sage now interprets Live Bookmarks just as it does regular bookmarks, allowing the user to subscribe to feeds using the auto-discovery mechanism in Firefox. One thing i like about Sage is the “render feeds in the contents area” option in the settings. This will load the feed in a browser tab with just pure data, no ads.

Mind sharing with us your favorite extensions? We’re interested to hear some favorite firefox extensions you use which deserves a mention, post them in comments…