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Tons of features to improve your user experience on YouTube™.
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 CPU and RAM resources if your device doesn't easily support HTML5 videos. Try it!
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.
Play YouTube™ Videos in Flash or HTML5 Player
Download YouTube videos in all available formats and extract the original audio files
Adds a context menu item to send audio/video streams directly to VLC media player
Fasterfox Requires Restart
STILL WORKS FLAWLESSLY AS OF 8-21-2017
The One; The Original Fasterfox Gives performance & network tweaks for Firefox. Fasterfox makes your browsing so much faster!
Make your Sites Faster than a Fox with Fasterfox for FireFox!
a download manager with multi-threading support
YouTube HTML5 Player -- Watch in HTML5 if Flash is disabled by your company or school.
Right click YouTube video links on any websites, download it from context menu. Multi formats(mp4 flv 3gp), easy to use and fast to response.
Some sites may not work with Firefox for Android video background play feature. This add-on provides a quick fix by blocking the Page Visibility API and the Fullscreen API.
1. Install Extension
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 Extension
Add a button to Youtube video directly, allowing you to download it's audio content as mp3 file instantly using www.pointmp3.com
Automatically play YouTube™ videos in HD or any other preferred format, and disable autoplay for videos loaded in background tabs.
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.
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.
Easily connect with friends and family while you browse internet. This add-on brings conversations to life with photos, emoji, and even group video calls!
YouTube Enhancer Plus Requires Restart
Improve your watching experience! Ad Blocker, Autoplay Manager, Auto HD, Auto Replay, Cinema Mode, and more.