Extensions are like apps for your browser.
They add features to Firefox to make browsing faster, smarter, or just plain fun.
Undo Close Tab
Allows you to restore the last closed tab with just one button click and gives you access to the list of recently closed tabs in the button context menu.
30,178 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.
169,837 users
Social Fixer
Social Fixer for Facebook fixes annoyances, adds features, and enhances existing functionality to make FB more fun and efficient. Filter the news feed, hide sponsored posts and political posts, hide parts of the page you don't want to see, and more!
16,272 users
Tomato Clock
Tomato Clock is a simple browser extension for managing your productivity.
14,800 users
Grammarly for Firefox
Grammarly will help you communicate more effectively. As you type, Grammarly flags mistakes and helps you make sure your messages, documents, and social media posts are clear, mistake-free, and impactful.
831,705 users
Gesturefy
Customizable mouse gesture add-on, which supports over 60 different commands and additional features like rocker and wheel gestures.
116,227 users
Clippings
Save frequently-entered text for pasting later.
34,116 users
Bookmarks Organizer
With the Bookmarks Organizer it's easy to put order in your bookmarks. The Bookmarks Organizer finds no longer working bookmarks, redirects, duplicates and more!
22,505 users
Enhancer for YouTube™
Tons of features to improve your user experience on YouTube™.
501,231 users
Turn Off the Lights
The entire page will be fading to dark, so you can watch the videos as if you were in the cinema. Works for YouTube™ and Beyond. It works for all known video sites such as YouTube, Vimeo, Twitch, Dailymotion, Facebook, Hulu, Metacafe, YouKu, etc.
42,225 users
Iridium for YouTube
YouTube with more freedom
15,237 users
SoundFixer
Lets you fix annoying sound problems in YouTube videos and such. Like audio in one channel only, too quiet or too loud. (Unfortunately, doesn't work on many other websites because of cross-domain issues — but it does work on YouTube.com!)
16,281 users
Brief
Brief makes reading RSS feeds as easy and intuitive as it gets. Designed to have exactly the right set of features, it is powerful and simple at the same time. Feeds are presented on a seamless, interactive page which let's you bookmark and tag items with a single click.
11,997 users
RSSPreview
Preview RSS feeds in browser
4,234 users
Feed Preview
Indicates available RSS and Atom feeds and renders previews.
2,805 users
mPage
Simple dashboard-like RSS feed reader.
661 users