Extensions
Explore powerful tools and features to customize Firefox and make the browser all your own.
Dark Background and Light Text
Make every web page (or just the pages you want) display light text on dark backgrounds. All color variations are fully customizable.
31,069 users
Power Thesaurus
Use the power of synonyms by button in toolbar, right-click or by word selection on any page.
10,428 users
Port Authority
Blocks malicious websites from port-scanning your computer/network and dynamically blocks all LexisNexis endpoints from running their invasive data collection scripts.
21,217 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.
114,102 users
Time Tracker - Web Habit Builder
Track time, analyze your habits and block addictive sites
9,360 users
SteamDB
Adds SteamDB links and new features on the Steam store and community. View lowest game prices and stats.
92,277 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
719,612 users
Time Tracker - Web Habit Builder
Track time, analyze your habits and block addictive sites
9,360 users
Power Thesaurus
Use the power of synonyms by button in toolbar, right-click or by word selection on any page.
10,428 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!
3,992 users
