We recommend! Extensions are the best tool to add some more and good Features to Firefoz browser. Firefox extensions are small add-on programs that add a new piece of functionality to the browser. These extensions can range from adding a new toolbar button to adding a completely new feature. The great thing about these extensions is that you can choose which extensions you want to add. You can also check 15 Best Firefox Extension Here
Here are some cool Firefox Extension which help you to add some extra features to Firefox
AdBlock Plus Adblock Plus removes unwanted content, such as ads or flash, from a web page based on a set of user defined filters. Adblock Plus is an offshoot of the original Adblock extension.
Blogrovr is a Firefox extension that acts as a blog reader’s best friend. BlogRovR shows you what YOUR favorite bloggers have to say about anything you’re browsing, unintrusively and as you browse.
Tell Blogrovr the blogs you like, and from then on, as you browse the web, Rovr instantly fetches you posts from them which link to whatever web page you’re viewing.
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.
Download Sort Automatically save downloads to different directories when using “Save Link As…” or “Save Image as…”
Nuke Anything Enhanced Allows hiding of almost anything via context menu ‘Remove Object’. Once installed, it adds a “Remove this object” option to the right click context menu. Place your mouse over information you don’t need printed (menu bars, big graphical logos and so on) and use “Remove this object” to remove them temporarily. Clean up the page, and print just what you need.
Full-Screen, 3D — PicLens transforms your browser into a visually stunning experience for enjoying online photos and videos. Our interactive “3D Wall” lets you effortlessly search and zoom your way around thousands of images and YouTube videos faster and more immersively than ever before.
Tab Mix Plus enhances Firefox’s tab browsing capabilities. It includes such features as duplicating tabs, controlling tab focus, tab clicking options, undo closed tabs and windows, plus much more. It also includes a full-featured session manager.
UnPlug is an extension which lets you save video and audio which is embedded on a webpage – it’s a video download tool. UnPlug works for most sites including youtube.com, ifilm.com, current.tv, revver.com, peekvid.com, video.google.com, and mobuzztv.com.
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!
BlueOrganizer BlueOrganizer understands the content of web pages and offers a smart-browsing experience: when looking at an address, find it on Google maps instantly, when reading a book review save it to your Amazon Wish List with a single click, or when looking at a movie add it immediately to your Netflix queue – and much more.
PicLens is my favorite out of all above. The execution is simply superb!