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YouTube High Definition Featured

YouTube High Definition is a powerful tool that will let you automatically play all YouTube videos in HD (High Definition), turn off annotations, change video player size, auto stop videos, auto mute videos, control embedded videos and much more.

Rated 5 out of 5 stars (237)
452,345 users

Pearltrees Featured

Pearltrees lets you organize all your interests.

Rated 5 out of 5 stars (249)
18,603 users

Master Password+ Requires Restart 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 (138)
24,557 users

Disconnect for Facebook™ Featured

Facebook™ Disconnect is an efficient firewall to disconnect third-party websites from accessing to your Facebook.

Rated 4 out of 5 stars (10)
28,607 users

YouTube Enhancer Plus Requires Restart Featured

Improve your watching experience! Ad Blocker, Autoplay Manager, Auto HD, Auto Replay, Cinema Mode, and more.

Rated 5 out of 5 stars (126)
57,359 users

Weather Underground (Forecast Plus) Featured

Provides local & long range Weather Forecast using Weather Underground

Rated 4 out of 5 stars (15)
13,741 users

Tab Scope Requires Restart Featured

Preview and navigate tab contents through popup.

Rated 4 out of 5 stars (478)
117,631 users

FindBar Tweak Featured

Between simple tweaks such as placing the findbar in the top corner, to the powerful "Find in All Tabs" tool, it has everything to make the Find Toolbar a powerful and accessible research tool!

Rated 5 out of 5 stars (299)
32,120 users

uMatrix Featured

Point & click to forbid/allow any class of requests made by your browser. Use it to block scripts, iframes, ads, facebook, etc.

Rated 5 out of 5 stars (112)
51,095 users

Ghostery Featured

Increase your browsing privacy, protection, and speed.

Rated 5 out of 5 stars (1,347)
1,381,787 users

Gmail™ Notifier (restartless) Featured

Multiple account (or label) Gmail notifier (without storing passwords)

Rated 4 out of 5 stars (279)
94,758 users

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 (1,017)
1,186,535 users

QuickMark Featured

A quick and minimalistic way to create bookmarks.

Rated 5 out of 5 stars (50)
11,705 users

CookieKeeper Featured

Extended Cookie Manager - Keep only wanted cookies.

Rated 4 out of 5 stars (66)
14,857 users

Theme Font & Size Changer Featured

Theme Font & Size Changer lets you change the global font size and font family used for the user interface in Firefox. Design your browser with your favorite font.

Rated 5 out of 5 stars (181)
106,375 users

Reader Featured

Reader is the ultimate Reader tool for Firefox.

Rated 5 out of 5 stars (69)
34,195 users

Slim Add-ons Manager Featured

The Add-ons Manager slims down!
This add-on reduces the height of entries in the Add-on Manager, so you can display more of them at a time.

Rated 5 out of 5 stars (50)
8,831 users

Beyond Australis Featured

Australis was the code name for the current Firefox theme, it aimed to make a great browser look awesome. Now you can go one step further and also make it feel awesome to use!

Rated 5 out of 5 stars (329)
39,689 users

YouTube™ Control Center Featured

YouTube Control Center is an open-source project that aims to enhance the overall YouTube experience by providing the end user with more control in what the playback process is concerned.

Rated 4 out of 5 stars (59)
13,870 users

DownThemAll! Featured

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

Rated 4 out of 5 stars (1,832)
1,211,928 users