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.
86,233 users
Gesturefy
Navigate, operate, and browse faster with mouse gestures! A customizable mouse gesture add-on with a variety of different commands.
82,848 users
Measure-it
Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.
21,883 users
SteamDB
Adds SteamDB links and new features on the Steam store and community. View lowest game prices and stats.
104,818 users
Time Tracker - Web Habit Builder
Track time, analyze your habits and block addictive sites
19,046 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.
111,877 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
742,461 users
Immersive Translate - Translate Website & PDF
Free Translate Website, Translate PDF & Epub eBook, Translate Video Subtitles in Bilingual
111,433 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.
60,462 users
Checker Plus for Gmail™
Get notifications, read, listen to or delete emails without opening Gmail and easily manage multiple accounts.
35,591 users
Gesturefy
Navigate, operate, and browse faster with mouse gestures! A customizable mouse gesture add-on with a variety of different commands.
82,848 users