Featured Extensions

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User Agent Switcher Featured

The User Agent Switcher extension adds a menu and a toolbar button to switch the user agent of a browser.

Rated 4 out of 5 stars (245)
382,994 users

Copy As Plain Text Featured

Removes formatting from copied text.

Rated 4 out of 5 stars (51)
23,636 users

FireSSH Featured

FireSSH is a free, cross-platform SSH terminal client for Mozilla Firefox. Written entirely in Javascript!

Rated 4 out of 5 stars (83)
29,188 users

Torrent Tornado Featured

A Torrent Client for Firefox and SeaMonkey, runs everywhere, created in pure JavaScript without binary software!

Rated 4 out of 5 stars (38)
28,231 users

CookieKeeper No Restart Featured

Extended Cookie Manager - Keep only wanted cookies.

Rated 4 out of 5 stars (38)
12,749 users

Lightweight Themes Manager No Restart Featured

Manage your installed personas (lightweight themes).

Rated 5 out of 5 stars (6)
14,491 users

Screengrab (fix version) Featured

Screengrab! saves webpages as images.
0.98 released!
New features: upload to internet

Rated 5 out of 5 stars (249)
143,225 users

Undo Closed Tabs Button Featured

Tired of going to History -> Recently Closed Tabs just to undo a closed tab? Then this extension is for you!

This extension allows you to undo closed tabs via a toolbar button or the right-click context menu.

Rated 4 out of 5 stars (358)
53,281 users

Mozilla Archive Format, with MHT and Faithful Save Featured

— Open web pages saved with Internet Explorer or other browsers (MHT)
— Save many tabs, video and audio reliably, in a single ZIP file (MAFF)
— Return to the original site you saved a page from, and more!

Rated 4 out of 5 stars (251)
174,447 users

OmniSidebar No Restart Featured

Bring your bookmarks into view with just a gesture. Move the sidebar across the screen. Open a different sidebar by just clicking its title. And more! Keeps your sidebar simple and quick to access!

Rated 5 out of 5 stars (74)
18,374 users

Google Privacy Featured

Make some popular websites respect your privacy settings.
Please see the known issues below!

Rated 5 out of 5 stars (33)
35,131 users

Adblock Plus No Restart Featured

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 (4,879)
20,372,408 users

Private Tab No Restart Featured

Adds private tabs.

Rated 5 out of 5 stars (183)
72,534 users

FEBE Featured

FEBE (Firefox Environment Backup Extension) allows you to quickly and easily backup your Firefox extensions. In fact, it goes beyond just backing up -- It will actually rebuild your extensions individually into installable .xpi files.

Rated 4 out of 5 stars (633)
130,241 users

Download YouTube Videos as MP4 No Restart Featured

An extension that adds direct links to download YouTube videos as MP4 and FLV. It has a simple interface and it downloads videos directly from YouTube. The extension integrates with YouTube's interface and adds a download button below the player.

Rated 4 out of 5 stars (339)
965,142 users

Master Password+ Featured

Various enhancements for build-in "master password" (MP)
-Locks master security device on demand or after specified time
-Prompts for MP on browser startup
-Suppresses all or duplicate MP prompts
-Locks up entire application or individual windows

Rated 4 out of 5 stars (110)
23,763 users

Disconnect Featured

Make the web faster, more private, and more secure.

Rated 4 out of 5 stars (141)
254,120 users

Mind the Time No Restart Featured

Keep track of how much time you spend on the web, and where you spend it. A toolbar ticker shows the time spent at the current site or the total time spent on the web today. A summary page sums up data for the past 70 days, 10 weeks, and 6 months.

Rated 4 out of 5 stars (68)
10,961 users

Tab Scope Featured

Preview and navigate tab contents through popup.

Rated 4 out of 5 stars (453)
162,901 users

Resurrect Pages Featured

Dead pages, broken links, the scourge of the internet. Powerhouse sites like Slashdot and Digg can bring a server to its knees. What do we do when a page is dead but we still want to see it? Call in the clerics, and perform a resurrection...

Rated 5 out of 5 stars (66)
27,003 users