YouTube Download Master
YouTube Video Download Master lets you download YouTube videos in resolutions up to 8K or convert them to audio—completely free and without any subscription. Enjoy unlimited video and audio downloads with just one click!
320 users
Pinyin Annotator
Pinyin Annotator is a browser extension overlays Hanyu Pinyin or Zhuyin annotations over Chinese characters present in web pages and video closed captions.
319 users
Quick YouTube Downloader
Quick YouTube Downloader lets you download YouTube videos in up to 8K resolution or convert them to audio—entirely free and with no subscription. Enjoy unlimited video and audio downloads with just one click!
258 users
YouTube Musical Spectrum
Audio visualizer for YouTube, YT Music, Spotify, and SoundCloud with musical notes.
253 users
Video Speed Controller
Easily control HTML5 video playback speed on any website, with an intuitive interface and features tailored to both desktop and mobile versions of Firefox.
247 users
Relingo - Master words from any webpage
Reading based on interest and mastering vocabulary unconsciously
172 users
YouTube Downloader
Download videos from 1000+ sites in 4K! Supports MP4, WebM, MP3, FLAC & more. Multi-language, dubbed YouTube, playlists, batch downloads & all audio bitrates — server-powered, zero device load. One click, any device!
169 users
Free YouTube Video Saver
Effortlessly download your favorite YouTube videos in stunning quality with just one click. Build your personal video library, enjoy seamless offline viewing, and share the best moments with friends—anytime, anywhere!
166 users
Scribble Pad
Scribble Pad lets you draw,sketch,text and annotate directly on any website in real-time, a complete lightweight package.
163 users
Video to Animated GIF
Converts the YouTube, Vimeo, webm, ogv or mp4 videos you are currently watching into an animated GIF.
152 users
YouTube Subs & Playlists Saver
Export YouTube subscriptions and playlists to CSV/JSON/TXT. Privacy-focused, 100% local processing—no data collection. Perfect for backups and importing to NewPipe, Tubular and other YouTube frontend apps. Free and open-source.
127 users
Tube Saver
Effortlessly download your favorite YouTube videos in high quality with a single click. Build your personal video library, enjoy offline viewing, and share with friends—anytime, anywhere!
118 users
Volume booster
Boost any tab to 500% or mute solo—no spill to other audio. 10-band EQ. Volume & sound per site for YouTube, music, streams & calls.
117 users
Snow for Firefox
Experience a snowstorm effect with falling snow on your page. Transform it into a winter wonderland with snowflakes.
113 users
Big Search
Handily use / switch search engines via a Flexible Tool. With some special technical features also. Definitly more than a GET/POST sender. Source code on Github. Vast search, search great! Breadth 🗺️ & Focus 👨💻
110 users
ProBlocker - Adblock for YouTube & Web
Fast, free adblock for YouTube™ and all sites. Block video ads, popups, banners and trackers.
88 users
