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.
This allows Firefox to stay small in size and run efficiently. The following is a list of the 20 of the best extensions for Firefox.


1. FlashGot
Download one link, selected links or all the links of a page together at the maximum speed with a single click, using the most popular and reliable external download managers for Windows, Mac OS X, Linux and FreeBSD.

2. NoScript
NoScript provides full user control over what domains allow javascripts to run. NoScript can also block Flash, Java, disallow bookmarklets to work, and block or allow the 'ping' attribute of a tag.

3. Fasterfox
Fasterfox allows you to tweak many network and rendering settings such as simultaneous connections, pipelining, cache, DNS cache, and initial paint delay.

4. Addblock
Adblock Plus removes unwanted content, such as ads or flash, from a web page based on a set of user defined filters.

5. VideoDownloader
Download videos from Youtube, Google, Metacafe, iFilm, Dailymotion... and other 60+ video sites. And all embedded objects on a webpage (movies, mp3s, flash, quicktime, etc).

6. DownThemAll!
The first and only download manager/accelerator built inside Firefox!

7. StumbleUpon
The StumbleUpon Firefox extension is an interface to the StumbleUpon site, a large community of users who make reviews and recommendations of websites to other users. The extension allow you to rate sites as your browse them, add reviews, and view reviews submitted by other users.

8. IE Tab
IE Tab - an extension from Taiwan, features: Embedding Internet Explorer in tabs of Mozilla/Firefox.

9. Tab Mix Plus
Tab Mix Plus provides the user with complete customization over how tabs operate in Firefox. Options include changing the display appearance of tabs, protecting tabs, reopening closed tabs, and selecting how and where links open.

10. Forecastfox
Get international weather forecasts from AccuWeather.com, and display it in any toolbar or statusbar with this highly customizable and unobtrusive extension.

11. Torrent Search Bar
Search Torrents in more then 29 Top Torrent Search engines.

12. Web Developer
The Web Developer Extension adds a toolbar to the browser containing various web developer tools. It outlines page elements, displays the size of images, gives CSS and form information, disables certain elements on a page, and much more.

13. PDF Download
Every time a PDF link is clicked on, this extension offers the choice of whether to open the pdf file inside a new tab, download it to the computer, or view it as HTML.

14. Mouse Gestures
Allows you to execute common commands (like page forward/backward, close tab, new tab) by mouse gestures drawn over the current webpage, without reaching for the toolbar or the keyboard.

15. Wizz RSS News Reader
A fairly good RSS and Atom news reader.

16. Colorful Tabs
The most beautiful yet the simplest add-on that makes a strong colorful appeal. Colors every tab in a different color and makes them easy to distinguish while beautifying the overall appearance of the interface.

17. FireFTP
FireFTP is a free, secure, cross-platform FTP client for Mozilla Firefox which provides easy and intuitive access to FTP servers.

18. FoxyTunes
Now you can control your favourite media player without ever leaving the browser.
Supports WinAmp, iTunes, Yahoo Music Engine, Pandora, foobar2000 and more...

19. Del.icio.us
The del.icio.us extension integrates del.icio.us into Firefox. It adds buttons to quickly jump to del.ico.us and post new entries.

20. SessionSaver
SessionSaver restores your browser -exactly- as you left it, every startup, every time. Not even a crash will phase it.

written by Florin C.
Helpero.com