Extensions
Explore powerful tools and features to customize Firefox and make the browser all your own.
Sidebery
Vertical tabs tree and bookmarks in sidebar with advanced containers configuration, grouping and many other features.
55,731 users
Measure-it
Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.
21,763 users
NoScript Security Suite
The best security you can get in a web browser! Allow potentially malicious web content to run only from sites you trust. Protect yourself against XSS other web security exploits.
247,799 users
SteamDB
Adds SteamDB links and new features on the Steam store and community. View lowest game prices and stats.
105,359 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.
111,438 users
Time Tracker - Web Habit Builder
Track time, analyze your habits and block addictive sites
18,999 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
741,003 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.
65,133 users
Checker Plus for Gmail™
Get notifications, read, listen to or delete emails without opening Gmail and easily manage multiple accounts.
37,225 users
Chrome Mask
Makes Firefox wear a mask to look like Chrome to websites that block Firefox otherwise.
51,789 users
Show Video Controls for Firefox
Automatically enables video controls when playing html webm videos.
5,472 users