Explore powerful tools and features to customize Firefox and make the browser all your own.
Dark mode for every website. Take care of your eyes, use dark theme for night and daily browsing.
566 381 users
Allows you to choose the default bookmark location folder and quickly bookmark pages via a dedicated icon.
22 233 users
Encrypt the web! HTTPS Everywhere is a Firefox extension to protect your communications by enabling HTTPS encryption automatically on sites that are known to support it, even when you type URLs or follow links that omit the https: prefix.
739 840 users
Delete browsing data directly from the browser toolbar. Clear cookies, history and cache with a single click.
13 194 users
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
57 969 users
A secure and free password manager for all of your devices.
218 484 users
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.
202 121 users
Automatically learns to block invisible trackers.
976 267 users
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.
160 019 users
This is probably a laser cat add-on so you can shoot laser cat lasers at things.
6 807 users
Clear browser cache with a single click or via the F9 key. F9 Fever! ;)
45 209 users
Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.
29 493 users