Extensions
Explore powerful tools and features to customize Firefox and make the browser all your own.
Imagus
With a simple mouse-over you can enlarge images and display images/videos from links.
57,260 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.
159,019 users
SteamDB
Adds SteamDB links and new features on the Steam store and community. View lowest game prices and stats.
99,636 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.
112,979 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
735,561 users
Privacy Badger
Automatically learns to block hidden trackers. Made by the leading digital rights nonprofit EFF to stop companies from spying on you.
1,899,924 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!)
43,980 users
Tab Stash
Easily save and organize batches of tabs as bookmarks. Clear your tabs, clear your mind. Only for Firefox.
44,188 users
Yomitan
Powerful and versatile pop-up dictionary for language learning used by 100,000+ language learners.
35,677 users
Immersive Translate - Translate Website & PDF
Free Translate Website, Translate PDF & Epub eBook, Translate Video Subtitles in Bilingual
111,827 users