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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 (170)
110,727 users

Pearltrees Featured

Pearltrees lets you organize all your interests.

Rated 5 out of 5 stars (250)
17,872 users

YouTube Flash Video Player

YouTube Flash Video Player is a powerful tool that will let you choose Flash video player as default YouTube video player.

Rated 5 out of 5 stars (60)
254,911 users

Enable WhatsApp Web

Removes the checks WhatsApp put in place to disable Firefox accessing WhatsApp Web, the new web interface.

**NOTICE: WhatsApp Web is now compatible with Firefox! You don't need to install this addon any more**

Rated 5 out of 5 stars (21)
4,936 users

Twitter App

Twitter App brings Twitter right into your Firefox Sidebar.

Rated 5 out of 5 stars (20)
12,328 users

Messenger for Facebook™

Messenger for Facebook™ lets you bring a Messenger right into your browser to chat with your friends.

Rated 5 out of 5 stars (40)
24,381 users

Stop Russian Propaganda Compatible with Firefox 57+

This extension blocks almost all Russian and pro-russian propaganda sites, that spread false information in the world.

Rated 5 out of 5 stars (23)
190 users

Youtube Dark Mode Compatible with Firefox 57+

Switch youtube to dark mode. Dark mode will help devices save battery and useful for your sleeping. This dark mode is supported by https://www.emojionline.org

Rated 5 out of 5 stars (70)
1,481 users

TinyURL Generator Requires Restart

An extension to silently generate a TinyURL for your current page at the click of a button. Also shows you where TinyURLs on the web will take you.

Rated 5 out of 5 stars (83)
15,118 users

Magic Actions for YouTube™ Compatible with Firefox 57+

Enhance your YouTube watching experience! Auto HD, Ad Block, Cinema Mode, Mouse Wheel Volume Control, Screenshot...

Rated 5 out of 5 stars (211)
44,322 users

Glauca

Show timeline of Sina weibo in the AwesomeBar. Providing more functions at the same time.

Rated 5 out of 5 stars (15)
21 users

YouTube Video Replay

YouTube Video Replay is a new tool that lets you replay YouTube Videos.

Rated 5 out of 5 stars (28)
8,426 users

Photo Zoom for Facebook™

Photo Zoom for Facebook™ lets you zoom Facebook™ images.

Rated 5 out of 5 stars (17)
9,732 users

VK scrobbler Compatible with Firefox 57+

Scrobble music from vk.com to last.fm

Rated 5 out of 5 stars (12)
1,237 users

S3.Google Translator Requires Restart

S3.Google Translator adds the power of Google Translate’s automatic translations to your browser!
It supports translation of selected text, entered phrase or whole webpage between any of 80+ languages.

New Feature: Language learning!

Rated 5 out of 5 stars (359)
374,292 users

AntyŚledzik - Skasuj śledzika z NK Requires Restart

AntyŚledzik jest dodatkiem usuwającym Śledzika KOMPLETNIE z naszej-klasy.pl. Poza kasowaniem boxa ze strony głównej kasuje także linki w menu oraz na stronie profilu.

Rated 5 out of 5 stars (10)
11 users

YouTube Video Center

Youtube Video Center changes the new Youtube design and centers the whole Youtube page on the screen automatically.

Rated 5 out of 5 stars (12)
4,106 users

Message Seen Disable for Facebook™

Message Seen Disable for Facebook™ lets you turn off Facebook™'s Message Seen feature automatically for your account. You can still use Seen feature for others.

Rated 5 out of 5 stars (12)
7,535 users

Minggl Requires Restart

Minggl is a social interaction manager. The Minggl toolbar makes it easy to manage information, communication, and navigation across (and independent of) social networks. Minggl adds a "relationship layer" across all your sites.

Rated 5 out of 5 stars (16)
3 users

F.B. Purity - Cleans Up Facebook

F.B. Purity hides the ads, app spam and other annoying clutter from your facebook news feed, lets you increase the font size, change colours plus many more features and generally makes Facebook a lot less annoying to use.

Rated 5 out of 5 stars (101)
31,347 users