Extensions
Explore powerful tools and features to customize Firefox and make the browser all your own.
OneTab
OneTab - Too many tabs? Convert tabs to a list and reduce browser memory
154,000 users
Grammar and Spell Checker - LanguageTool
With this extension you can check text with the free 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.
353,677 users
Image Search Options
A customizable reverse image search tool that conveniently presents a variety of top image search engines.
44,124 users
Clear Cache
Clear browser cache with a single click or via the F9 key. F9 Fever! ;)
64,505 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.
68,703 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
454,565 users
Privacy Badger
Automatically learns to block invisible trackers.
1,237,170 users
uBlock Origin
Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.
7,980,145 users
automaticDark - Time-Based Theme Changer
Automatically change Firefox's theme based on the time.
18,281 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!)
50,993 users
Simple Tab Groups
Create, modify, and quickly change tab groups
92,087 users
Clippings
Save frequently-entered text for pasting later.
14,331 users