1. Adblock Plus - The Adblock Plus extension disable almost every kind of ads out of web pages, including Flash and etc, it also prevents pop outs.
2. FireBug is an integrated JavaScript, CSS, HTML, and Ajax debugger for Firefox, including an error console, command line, and inspectors. This is a very useful tool especially for website developers out there.
3. Cooliris - The Cooliris 3D Wall -- Simply the fastest and most stunning way to browse photos and videos from the Web or your desktop. Effortlessly scroll an infinite "3D Wall" of your content from Facebook, Google Images, YouTube, etc. Not so much into browsing image though but this is a great tool for those who love browsing for pictures and loves to look at them in a very sleek way.
4. Google Preview - Ofcourse, before entering a webpage everybody would like to have a preview any page they are about to enter. This add on inserts preview images (thumbnails) and popularity ranks of web sites into the Google and Yahoo search results pages.
5. Interclue - Ever wanted to know what was behind the link before you clicked? Interclue tells you everything you need to know before you open yet another tab.
6. Shareaholic - Shareaholic is the better, quicker, easier way to share, e-mail, tweet, and bookmark stuff you care about online with friends, family, and co–workers. This is a good way of sharing links to other surfers especially when you are promoting websites.
7. iMacros - Automate Firefox. Record and replay repetitious work. If you love the Firefox web browser, but are tired of repetitive tasks like visiting the same sites every days, filling out forms, and remembering passwords, then iMacros for Firefox is the solution you’ve been dreaming of! ***Whatever you do with Firefox, iMacros can automate it.***
8. Download Statusbar - View and manage downloads from a tidy statusbar - without the download window getting in the way of your web browsing.
