Today I am going give you 10 unique firefox addons
1.
Flash video youtube downloader-Download any kind of media even swf from any site with this addon
2.
Flashgot-
Downloading FLV files has never been
easier, thanks to FlashGot, an unobtrusive Firefox add-on. Even without a
user guide, this simple program will have the least experienced user
downloading files in an instant.
3.web2pdf converter-Lets you convert any webpage into pdf format
4.
FoxTab-Surfing is FoxTab with the experience. The tabs fly as a window on the screen – a very smart, modern addon. FoxTab
5.
FireBug - ফায়ার বাগ- With this you can edit any page live.
6.
WOT (Web Of Trust) - উট (অয়েব অফ ট্রাষ্ট)-Web of Trust appends starred safety ratings to search results, so you
know how "safe" a page is before clicking a link. WOT works with every
major search engine, and the safety rankings are derived from WOT user
feedback. WOT is among
the most popular Firefox add-ons out there, so it has more than enough
support to provide accurate and timely safety ratings.I strongly recommend it.
7.
Ad-Block Plus - এড-ব্লক প্লাস - One of the best known and simplest Firefox
add-ons, AdBlock Plus effectively blocks online ads from a predefined
list of ad providers
8.
Xmarks Bookmark and Password Sync -Anyone who uses multiple PCs will appreciate Xmarks since you maintain
one set of bookmarks across all PCs. Just install Xmarks into Firefox
and it will record your current bookmarks roster, as well as the saved
passwords in your Firefox password manager. On any other computer
running Firefox, just download Xmarks, use your Xmarks login, and all
your passwords and bookmarks are ported into the current browser. Sign
out and the import is revoked. As a guy who logs into multiple VPNs on
several machines - each with long, convoluted URL structures - Xmarks is
a lifesaver.
9.
FastestFox -
FastestFox (formerly SmarterFox) is one of
the more powerful add-ons to enhance Firefox browsing. It displays a
clean-looking bubble filled with customizable search engine shortcuts
when you highlight a word or phrase. Type a query into the Firefox
address bar, and FastestFox will offer up suggestions as you type. It
will also place alternative search engine icons on a results page (like
Google, Yahoo, and Bing), and will repeat smaller version of those icons
on Wikipedia pages, along with a list of related articles.
10.
greasemonkey -Allows you to customize the way a web page displays or behaves, by using small bits of JavaScript. You can write your own scripts,use your own "plugins", not only already written.Great for advanced users.
below the post. 
