Extensions
Explore powerful tools and features to customize Firefox and make the browser all your own.
Measure-it
Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.
31,473 users
Dark Reader
Dark mode for every website. Take care of your eyes, use dark theme for night and daily browsing.
405,535 users
Turbo Download Manager
A download manager with the ability to pause and resume downloads, download remote files, and more.
41,189 users
Tranquility Reader
Tranquility Reader improves the readability of web articles by removing unnecessary elements like ads, images, social sharing widgets, and other distracting fluff.
28,597 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.
256,779 users
Bitwarden - Free Password Manager
A secure and free password manager for all of your devices.
185,930 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.
35,507 users
Swift Selection Search
Swiftly access your search engines in a popup panel when you select text in a webpage. Context menu also included!
14,141 users
Tranquility Reader
Tranquility Reader improves the readability of web articles by removing unnecessary elements like ads, images, social sharing widgets, and other distracting fluff.
28,597 users
ScrollAnywhere
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
11,320 users
Forecastfox (fix version)
Get international weather updates (via AccuWeather.com) displayed right in Firefox with this highly customizable extension.
50,522 users
SingleFile | Save a page as a single HTML file
Save a complete page (with stylesheets, images, etc.) as a single HTML file
19,700 users