Extensions
Explore powerful tools and features to customize Firefox and make the browser all your own.
Stylus
Redesign your favorite websites with Stylus, an actively developed and community driven userstyles manager. Easily install custom themes from popular online repositories, or create, edit, and manage your own personalized CSS stylesheets.
109,877 users
automaticDark - Time-Based Theme Changer
Automatically change Firefox's theme based on the time.
13,460 users
Auto Tab Discard
Increase browser speed and reduce memory load and when you have numerous open tabs.
65,090 users
Download All Images
Easily save images with a wide range of customization features, such as file size, dimensions, and image type.
88,867 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.
68,271 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
445,540 users
Privacy Badger
Automatically learns to block invisible trackers.
1,218,874 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.
262,701 users
automaticDark - Time-Based Theme Changer
Automatically change Firefox's theme based on the time.
13,460 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!)
43,505 users
Simple Tab Groups
Create, modify, and quickly change tab groups
85,852 users
Search by Image
A powerful reverse image search tool, with support for various search engines, such as Google, Bing, Yandex, Baidu and TinEye.
332,405 users