Explore powerful tools and features to customize Firefox and make the browser all your own.
Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.
29 117 users
Tomato Clock is a simple browser extension for managing your productivity.
16 920 users
Finally, an efficient blocker. Easy on CPU and memory.
5 142 498 users
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.
80 059 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.
226 876 users
Save a complete page (with stylesheets, images, etc.) as a single HTML file
12 429 users
A secure and free password manager for all of your devices.
152 912 users
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.
31 322 users
Tabby helps you manage a lot of windows and tabs easily; it can help you open, close, move, pin, and do many other things on tabs and windows quickly. With Tabby, you can even save all you windows and tabs for later with just one click!
1 833 users
Remove tracking elements from URLs.
9 574 users
The best way to see the weather right in your browser. Easier than looking outside!
12 564 users
Scroll page without touching scroll-bar! Press Middle (Right / Left) mouse button anywhere on the page to scroll just like with scrollbar. Features also: - "grab and drag" scrolling - customizable scrollbars! - the Momentum auto-scroll
6 902 users