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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 (224)
565,689 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 (53)
253,960 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 (38)
23,787 users

Download Status Bar

If you are the kind of person who likes to have total control over every aspect of your downloads, "Download Status Bar" is the add-on you are looking for.

Rated 5 out of 5 stars (269)
208,859 users

YouTube Flash Player

A very lightweight add-on that allows you to watch YouTube™ videos using Flash® Player instead of the default HTML5 player. The Flash® Player will consume less material resources (CPU, RAM) if your PC doesn't easily support HTML5 videos. Try it!

Rated 5 out of 5 stars (71)
344,323 users

Enhancer for YouTube™ Featured

One of the best extensions for YouTube™. All the features you need to make YouTube™ more awesome!

Rated 5 out of 5 stars (72)
40,210 users

Magic Actions for YouTube™

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

Rated 5 out of 5 stars (184)
41,394 users

Lyrics Here by Rob W

Instant lyrics on YouTube, Spotify, Deezer, 8tracks, SoundCloud and many other music sites in a flexible panel. 40+ sources ensure that lyrics are always found. Simple to use and highly customizable. (formerly called "YouTube Lyrics by Rob W")

Rated 5 out of 5 stars (40)
6,046 users

Turn Off the Lights Featured

The entire page will be fading to dark, so you can watch the video as if you were in the cinema.

Rated 5 out of 5 stars (275)
58,234 users

Browser Backgrounds Requires Restart

Browser Backgrounds is the new Firefox extension that lets you install backgrounds directly on your browser.

Rated 5 out of 5 stars (41)
7,783 users

FlashStopper

Stops video autoplay and shows the preview thumbnail.

Rated 5 out of 5 stars (78)
57,103 users

Play/Pause

Adds a Play/Pause toggle onto tabs that contain an HTML5 audio/video player.

Rated 5 out of 5 stars (29)
3,036 users

FlashGot Mass Downloader Requires Restart

Download all the links, movies and audio clips of a page at the maximum speed with a single click, using the most popular, lightweight and reliable external download managers.

Rated 5 out of 5 stars (526)
680,061 users

YouTube Video Replay

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

Rated 5 out of 5 stars (28)
8,226 users

Photo Zoom for Facebook™

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

Rated 5 out of 5 stars (17)
9,876 users

Image Search Options Requires Restart

Image Search Options provides a set of highly customizable reverse image search context menu options.

Rated 5 out of 5 stars (78)
17,035 users

Media Keys

Lets you control various media sites using the media keys on your keyboard without having the Firefox window active.

Supported Sites: youtube, pandora, spotify, bandcamp, google play, yandex, soundcloud, tidalhifi, deezer, plex, vk and more.

Rated 5 out of 5 stars (72)
3,226 users

UltraFM

Ultra radio player (radioultra.ru).

Rated 5 out of 5 stars (12)
305 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)
4,149 users

Ultrawidify

Aspect ratio fixer for Youtube. Allows improperly encoded videos to properly fit wider displays (e.g. 21:9)

Rated 5 out of 5 stars (12)
1,457 users