Extensions
Explore powerful tools and features to customize Firefox and make the browser all your own.
Simple Translate
Quickly translate selected or typed text on web pages. Supports Google Translate and DeepL API.
266,541 users
Privacy Badger
Automatically learns to block hidden trackers. Made by the leading digital rights nonprofit EFF to stop companies from spying on you.
1,880,392 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!)
43,152 users
Auto Tab Discard
Increase browser speed and reduce memory load and when you have numerous open tabs.
78,714 users
Privacy Badger
Automatically learns to block hidden trackers. Made by the leading digital rights nonprofit EFF to stop companies from spying on you.
1,880,392 users
uBlock Origin
Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.
10,468,374 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.
257,991 users
Adaptive Tab Bar Color
Changes the color of Firefox theme to match the website’s appearance.
38,593 users
Awesome Screenshot & Screen Recorder
Full page screen capture and screen recorder 2 in 1. Share screencast video instantly.
105,009 users
Measure-it
Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.
22,777 users
Grammar and Spell Checker - LanguageTool
With this extension you can check text with the style and grammar checker LanguageTool. It finds many errors that a simple spell checker cannot detect, like mixing up there/their, a/an, or repeating a word.
403,859 users
Tranquility Reader
Tranquility Reader improves the readability of web articles by removing unnecessary elements like ads, images, social sharing widgets, and other distracting fluff.
41,150 users