Extensions
Explore powerful tools and features to customize Firefox and make the browser all your own.
uBlock Origin
Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.
7,762,168 users
Clear Browsing Data
Delete browsing data directly from the browser toolbar. Clear cookies, history and cache with a single click.
18,462 users
YouTube High Definition
YouTube High Definition is a powerful tool that automatically plays all YouTube videos in HD, changes video player size, offers auto-stop and mute, and much more.
162,253 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.
68,301 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
439,857 users
Decentraleyes
Protects you against tracking through "free", centralized, content delivery. It prevents a lot of requests from reaching networks like Google Hosted Libraries, and serves local files to keep sites from breaking. Complements regular content blockers.
262,071 users
automaticDark - Time-Based Theme Changer
Automatically change Firefox's theme based on the time.
7,518 users
SoundFixer
Helps you fix annoying sound problems on sites like YouTube: audio in one channel only, too quiet or too loud. (Unfortunately, this extension does not work on all websites because of cross-domain issues — but it does work on YouTube!)
35,318 users
Gesturefy
Navigate, operate, and browse faster with mouse gestures! A customizable mouse gesture add-on with a variety of different commands.
93,354 users
FoxyProxy Standard
FoxyProxy is an open-source, advanced proxy management tool that completely replaces Firefox's limited proxying capabilities. No paid accounts are necessary; bring your own proxies or buy from any vendor. The original proxy tool, since 2006.
205,587 users