Extensions
Explore powerful tools and features to customize Firefox and make the browser all your own.
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.
159 622 users
Video DownloadHelper
The easy way to download and convert Web videos from hundreds of YouTube-like sites.
2 295 290 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.
42 999 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
58 177 users
Bitwarden - Free Password Manager
A secure and free password manager for all of your devices.
216 402 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.
200 996 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.
159 622 users
LASER CAT
This is probably a laser cat add-on so you can shoot laser cat lasers at things.
6 771 users
Measure-it
Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.
28 748 users
