Greasemonkey Featured

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

Rated 4 out of 5 stars (964)
1,224,253 users


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 (1,176)
673,453 users


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

Rated 5 out of 5 stars (164)
418,234 users

Garmin Communicator

The Garmin Communicator is an internet browser plugin that allows you to easily transfer data between websites and Garmin GPS devices.

Rated 3 out of 5 stars (26)
391,903 users

Session Manager No Restart 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 5 out of 5 stars (436)
274,673 users

Mozilla Firefox hotfix No Restart

This official add-on enables Firefox to provide quick fixes for selected issues.

Rated 5 out of 5 stars (1)
242,642 users

Toolbar Buttons No Restart Featured

Adds toolbar buttons to the customize toolbar window in several programs including Firefox, Thunderbird and SeaMonkey. Some of the buttons make commonly preformed actions quicker, others add new functionality.

Rated 4 out of 5 stars (317)
126,715 users

Memory Fox

Attempting to reduce both Browser and Flash RAM Memory usage. Memory Fox will promote the increase of available RAM memories for other application processes. Hopefully, fostering any attempts of Memory Recovery and Retention.

Rated 4 out of 5 stars (329)
110,309 users

PDF Viewer(discontinued) No Restart


Rated 4 out of 5 stars (269)
96,101 users


Simulate WAP browsing by viewing WML (Wireless Markup Language) pages.

Rated 4 out of 5 stars (31)
86,854 users

Translate This! No Restart

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

Rated 4 out of 5 stars (90)
80,586 users

UnMHT No Restart

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 5 out of 5 stars (220)
79,498 users

Save as PDF

Lets you download web pages as PDF in one click.

Rated 3 out of 5 stars (111)
76,725 users

LeechBlock 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 (528)
76,223 users

Add-on Compatibility Reporter No Restart

Help make Firefox better. The Add-on Compatibility Reporter enables you to report if the Firefox add-ons that you're using are working properly.

Rated 4 out of 5 stars (213)
74,069 users

YouTube Center No Restart

YouTube Center contains all kind of different useful functions which makes your visit on YouTube much more entertaining.

Rated 3 out of 5 stars (290)
66,091 users

Image Block Featured

Image Block adds a toggle button that conditionally blocks/allows loading of images on webpages. Blocking images results in faster browsing, especially helpful on handheld devices or slower connections like GSM/GPRS/EDGE dial-up etc.

Rated 4 out of 5 stars (133)
62,869 users

Secure Login

Secure Login is an extension for Firefox integrated password manager.

Rated 4 out of 5 stars (374)
48,956 users


It adds some options to launch easily other profiles and the Profile Manager.

Rated 4 out of 5 stars (69)
47,915 users

Low Quality Flash

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)
47,877 users