Extensions
Explore powerful tools and features to customize Firefox and make the browser all your own.
User-Agent Switcher and Manager
Spoof websites trying to gather information about your web navigation—like your browser type and operating system—to deliver distinct content you may not want.
92,125 users
Stylus
Redesign your favorite websites with Stylus, an actively developed and community driven userstyles manager. Easily install custom themes from popular online repositories, or create, edit, and manage your own personalized CSS stylesheets.
133,702 users
Immersive Translate - Translate Website & PDF
Free Translate Website, Translate PDF & Epub eBook, Translate Video Subtitles in Bilingual
109,010 users
Turn Off the Lights for Firefox
The entire page will be fading to dark, so you can watch the videos as if you were in the cinema. Works for YouTube and Beyond. Dark mode for all websites. It works for all known video sites such as YouTube, Vimeo, Twitch, Dailymotion, Facebook, etc.
47,940 users
Time Tracker - Web Habit Builder
Track time, analyze your habits and block addictive sites
10,371 users
LeechBlock NG
LeechBlock NG is a simple productivity tool designed to block those time-wasting sites that can suck the life out of your working day. All you need to do is specify which sites to block and when to block them.
113,057 users
SteamDB
Adds SteamDB links and new features on the Steam store and community. View lowest game prices and stats.
94,208 users
SponsorBlock - Skip Sponsorships on YouTube
Easily skip YouTube video sponsors. When you visit a YouTube video, the extension will check the database for reported sponsors and automatically skip known sponsors. You can also report sponsors in videos. Other browsers: https://sponsor.ajay.app
725,956 users
Image Max URL
Finds larger/original versions of images (supporting 10,000+ websites), including a powerful media popup feature
19,025 users
Sink It for Reddit
Upgrade your Reddit experience with color coded comments, easier nav, sub-reddit blocking, gestures for upvoting, ad+nag blocking, and more. It's like RES, for mobile!
10,947 users
Show Video Controls for Firefox
Automatically enables video controls when playing html webm videos.
3,500 users
