Greasemonkey Requires Restart Featured

Customize the way a web page displays or behaves, by using small bits of JavaScript.

Rated 4 out of 5 stars (1,012)
63,798 weekly downloads

Hoxx VPN Proxy

Hoxx VPN Proxy service to unblock blocked websites, hide your location and encrypt your connection. Completely free.

Rated 5 out of 5 stars (1,132)
30,326 weekly downloads

Reload Plus Featured

Supercharge your reload button and hotkeys!

Rated 5 out of 5 stars (79)
11,692 weekly downloads

EPUBReader Requires Restart

With EPUBReader you can read ePub files just in Firefox. No additional software needed!

Rated 5 out of 5 stars (177)
10,574 weekly downloads

Flashblock Requires Restart

Never be annoyed by a Flash animation again! Blocks Flash so it won't get in your way, but if you want to see it, just click on...

Rated 4 out of 5 stars (1,219)
8,169 weekly downloads

Auto Form Requires Restart

Copy/Paste all fields from a web form in one click.

Rated 3 out of 5 stars (16)
8,111 weekly downloads

Session Manager Featured

Session Manager saves and restores the state of all or some windows - either when you want it or automatically at startup and after crashes. It can also automatically save the state of open windows individually.

Rated 4 out of 5 stars (486)
6,440 weekly downloads

Save as PDF Requires Restart

Lets you download web pages as PDF in one click.

Rated 2 out of 5 stars (133)
6,321 weekly downloads

Selenium IDE Button Requires Restart

Just one simple toolbar button to open Selenium IDE. You need to have installed Selenium IDE: http://seleniumhq.org/projects/ide/

Rated 5 out of 5 stars (8)
5,603 weekly downloads

Add-ons Manager Context Menu Requires Restart Featured

Add more items to Add-ons Manager context menu.

Rated 5 out of 5 stars (37)
4,521 weekly downloads


Tampermonkey is the world's most popular userscript manager.

Rated 4 out of 5 stars (30)
4,036 weekly downloads

QuickNote Requires Restart

A simple note-taking extension.

Rated 5 out of 5 stars (174)
3,670 weekly downloads

Translate This!

Translate the whole entire page or just a selection using Google Translate.

Rated 4 out of 5 stars (103)
3,498 weekly downloads


UnMHT allows you to view MHT (MHTML) web archive format files, and save complete web pages, including text and graphics, into a single MHT file in Firefox/SeaMonkey.

Rated 4 out of 5 stars (229)
3,084 weekly downloads

PDF Mage

Save any page as PDF

Rated 4 out of 5 stars (42)
2,958 weekly downloads

LeechBlock Requires Restart Featured

LeechBlock is a simple productivity tool designed to block those time-wasting sites that can suck the life out of your working day. All you need to do is specify which sites to block and when to block them.

Rated 5 out of 5 stars (624)
2,909 weekly downloads

APK Downloader

Download APK files from Google Play Store (Android Market) for free, from your browser.

Rated 4 out of 5 stars (79)
2,817 weekly downloads

YouTube Plus

YouTube with more freedom.

Rated 5 out of 5 stars (66)
2,703 weekly downloads

Web2PDF Converter Requires Restart Featured

Web page to PDF conversion tool

Rated 4 out of 5 stars (92)
2,579 weekly downloads

Low Quality Flash Requires Restart

Sets Flash objects to "Low Quality" to improve performance on slower platforms (i.e. older computers, netbooks, and Firefox Mobile).

Rated 4 out of 5 stars (50)
2,487 weekly downloads