Add-ons
To try the thousands of add-ons available here, download Mozilla Firefox, a fast, free way to surf the Web!
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Choose from thousands of extra features and styles to make Firefox your own.
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YouTube High Definition
This add-on is not compatible with your version of Firefox because of the following:
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.
286,127 users -
YouTube Enhancer Plus
This add-on is not compatible with your version of Firefox because of the following:
Improve your watching experience! Ad Blocker, Autoplay Manager, Auto HD, Auto Replay, Cinema Mode, and more.
62,313 users -
YouTube Anywhere Player
This add-on is not compatible with your version of Firefox because of the following:
Watch videos anywhere in cinema mode without leaving the website you're on.
20,371 users
Most Popular See all »
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Downloads YouTube videos in all available formats (FLV, MP4, WebM, and 3GP) with video quality of your choice. It also contains a pure JavaScript library to extract the ORIGINAL audio file embedded in video files.This add-on is not compatible with your version of Firefox because of the following:
709,644 users -
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!This add-on is not compatible with your version of Firefox because of the following:
376,876 users -
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.This add-on is not compatible with your version of Firefox because of the following:
286,127 users -
The One; The Original Fasterfox Gives performance & network tweaks for Firefox. Fasterfox makes your browsing so much faster!This add-on is not compatible with your version of Firefox because of the following:
Make your Sites Faster than a Fox with Fasterfox for FireFox!100,036 users -
Google™ Translator is a handy multi-language translator built on top of Google Translate. It gives you Google Translate UI feel right on your Firefox toolbar.This add-on is not compatible with your version of Firefox because of the following:
82,099 users -
Improve your watching experience! Ad Blocker, Autoplay Manager, Auto HD, Auto Replay, Cinema Mode, and more.This add-on is not compatible with your version of Firefox because of the following:
62,313 users
Top Rated See all »
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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.
This add-on is not compatible with your version of Firefox because of the following:
286,127 users -
Discover great sites and earn money: This Add-on simply sets Wisedock as your browser home page.This add-on is not compatible with your version of Firefox because of the following:
With Wisedock you discover interesting websites, support social projects and earn some money.
Use this Add-on if you are located in Europe.114 users -
Cas24play browser plug-in - stable web site access.This add-on is not compatible with your version of Firefox because of the following:
377 users -
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!
This add-on is not compatible with your version of Firefox because of the following:
376,876 users -
Share Button for Facebook™ lets you share any web page on your Facebook™ Timeline by a quick button.This add-on is not compatible with your version of Firefox because of the following:
10,268 users -
One of the best extensions for YouTube™. All the features you need to make YouTube™ more awesome!This add-on is not compatible with your version of Firefox because of the following:
22,604 users
Recently Added See all »
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Removes all web content from Battlehand web page except the game and/or the chat.This add-on is not compatible with your version of Firefox because of the following:
0 users -
1. Install ExtensionThis add-on is not compatible with your version of Firefox because of the following:
2. Play youtube video in your browser
3. Click the KV icon then click respective links to download
The most popular Keepvid.site website's Youtube Video Download Extension7 users -
Make Trump Taco Again: Replaces "Trump" with "Drumpf" and "Wall" with "Taco".This add-on is not compatible with your version of Firefox because of the following:
9 users -
Allow to hide all AdoptAGuy(.com)'s profile viewed.This add-on is not compatible with your version of Firefox because of the following:
2 users -
A collection of small quality of life imporovements for Roosterteeth.comThis add-on is not compatible with your version of Firefox because of the following:
0 users -
Extension making 'The Settlers Online' collectibles easy to find!This add-on is not compatible with your version of Firefox because of the following:
16 users
See all 1193 extensions in Games & Entertainment »
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