Extensions
Explore powerful tools and features to customize Firefox and make the browser all your own.
Undo Close Tab
Allows you to restore the tab you just closed with a single click—plus it can offer a list of recently closed tabs within a convenient context menu.
43,425 users
Yomitan
Powerful and versatile pop-up dictionary for language learning used by 100,000+ language learners.
39,985 users
automaticDark - Time-Based Theme Changer
Automatically change Firefox's theme based on the time.
17,409 users
Snap Links Plus
Select a number of links with a rectangle and open them in new tabs. You can also lasso checkboxes to quickly check or uncheck them. Works with radio buttons as well.
15,774 users
Time Tracker - Web Habit Builder
Track time, analyze your habits and block addictive sites
17,852 users
SteamDB
Adds SteamDB links and new features on the Steam store and community. View lowest game prices and stats.
109,509 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.
106,113 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
737,536 users
Clear Browsing Data
Delete browsing data directly from the browser toolbar. Clear cookies, history and cache with a single click.
28,660 users
automaticDark - Time-Based Theme Changer
Automatically change Firefox's theme based on the time.
17,409 users
