My favorite Firefox Extentions

Extentions that i cannot live without in firefox.

1) Adblock Plus
Blocks all the adds, just couldn't live without it.
https://addons.mozilla.org/en-US/firefox/addon/1865

2) delicious bookmarks
Synchronizes all my bookmarks with del.icio.us. There is offline storage of bookmark which opens in a sidebar. Its really helpful.
http://delicious.com/help/quicktour/firefox

3) Downthemall
Helpful for quick and easy download. Supports resume and multiple part download. I rarely use an external downloader now.
http://www.downthemall.net

4) Firebug
Extremely helpful for debugging websites. If you are a webdeveloper then this is a must install addon. Helps to debug http requests, inspect DOM, modify CSS on the fly and lots of other features.
http://www.getfirebug.net

5) Fast Dial
When you open a new tab or a new window, it shows you a the thumbnail display of the websites you add to it. Its like a shortcut to most frequently used website. Extremely helpful.
https://addons.mozilla.org/en-US/firefox/addon/5721

6) Wikia Search Extension
Google isn't the only search engine. Now wikia is in my view a good open source alternative with user feedback option. You can add submit websites by a single Submit button. Also there is feature of rating as well.
https://addons.mozilla.org/en-US/firefox/addon/8267

7) Zotero
Saves your notes and research links inside your browser. Also it has option to sync your notes online. Helpful when you are doing lots of researches.
https://addons.mozilla.org/en-US/firefox/addon/3504

8) Tabs open relative
When google chrome was released, i loved its feature of opening new tab right beside the old tab. No more scrolling to the end of the tab list. Saves a lot of time and ease of use.
https://addons.mozilla.org/en-US/firefox/addon/1956

9) Tab duplicate
Duplicates the current tab. Helpful sometimes although i dont use it too much.
https://addons.mozilla.org/en-US/firefox/addon/28

10) Switch Proxy
Save a list of proxies. It then can be used as a minimalistic interface to switch between proxies. Very easy to use.
https://addons.mozilla.org/en-US/firefox/addon/125

Lots more useful addons available at https://addons.mozilla.org

Cheers all