Top-Rated Extensions

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lolifox - Fierr MOD

Replaces the error page with a lolifox appearance with additional features.

Rated 5 out of 5 stars (17)
4,535 users

Adblock Plus No Restart

Blocks annoying video ads on YouTube, Facebook ads, banners and much more.

Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).

Rated 5 out of 5 stars (4,193)
18,534,047 users

Adblock Edge No Restart

Adblock Edge is a fork of the Adblock Plus version 2.1.2 extension for blocking advertisements on the web, without sponsored ads whitelist or bribes...

Rated 5 out of 5 stars (161)
600,458 users

Ghostery No Restart

Protect your privacy. See who's tracking your web browsing and block them with Ghostery.

Rated 5 out of 5 stars (808)
1,088,509 users

about:addons-memory No Restart

Adds an about:addons-memory page that details add-on memory usage

Rated 5 out of 5 stars (54)
28,675 users

Remote XUL Manager No Restart

Manages the Remote XUL whitelist to allow websites and local files to load XUL content.

Rated 5 out of 5 stars (28)
27,679 users

Extension Auto-Installer No Restart

For extension developers: allows automatically adding or updating browser extensions, e.g. with command line tools.

Rated 5 out of 5 stars (9)
2,685 users

Toggle animated GIFs No Restart

Start/stop GIF animations through a keyboard shortcut or by clicking them. You can also restart animations from the beginning, or disable animations by default.

Rated 5 out of 5 stars (16)
5,098 users

PriceBlink - Automatic Price Comparison & Coupons No Restart Featured

**About 2012 Reader’s Choice Award: Best Browser Addon**

Automatically finds lower prices and money-saving coupons from thousands of retailers while you shop. PriceBlink stays hidden until you are shopping. US and UK.

Demo: youtu.be/UKxMx5bT-QM

Rated 5 out of 5 stars (83)
33,904 users

QuitNow No Restart Featured

Adds a Quit menu item back to Firefox / Mobile. With the original Mozilla branding!

ALERT! Click "Read More" (below) about a Firefox bug with this and other addons, and how to fix it if you have it :-D

Rated 5 out of 5 stars (53)
68,221 users

FoxTrick No Restart

Firefox extension for the popular Hattrick.org online football game.

It takes time for Mozilla to review updates thus this version might be out of date sometimes. The latest stable release can always be found on https://www.foxtrick.org/download

Rated 5 out of 5 stars (51)
13,855 users

Clean Links No Restart

Converts obfuscated/nested links to genuine clean links.

Eg: http://somesite.com/?to=www.example.comhttp://www.example.com/

Rated 5 out of 5 stars (39)
22,666 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 (182)
87,523 users

Bluhell Firewall No Restart Featured

Get a faster browsing experience by blocking nasty web resources using Bluhell Firewall, the lightweight Ad-Blocker and Tracking/Privacy Protector.

Rated 5 out of 5 stars (108)
107,700 users

Fierr

Replaces the error page with a more stylish appearance with additional features.

Rated 5 out of 5 stars (42)
4,601 users

CleanQuit (Mobile) No Restart

Clean up the mess and quit! This extension brings back the good old quit button to life as well as the ability to clean what you wish at the same time.

Rated 5 out of 5 stars (22)
17,059 users

Always Zoom No Restart

Allow zooming even on pages that disable it.

Rated 5 out of 5 stars (11)
6,514 users

Silent Block

Minimum and fast URL blocking by regular expressions.

Rated 5 out of 5 stars (15)
4,416 users

Smart Referer No Restart

Send referers only when staying on the same domain.

You can whitelist domains with wildcards and configure other things, look in the preferences page of the addon in the addon manager.

Rated 5 out of 5 stars (26)
7,524 users

Self-Destructing Cookies No Restart

Cookies when you need them, not when others need them to track you - gets rid of a site's cookies and LocalStorage as soon as you close its tabs. Protects against trackers and zombie-cookies. Trustworthy services can be whitelisted.

Rated 4 out of 5 stars (225)
145,356 users