Extensions are like apps for your browser.
They add features to Firefox to make browsing faster, smarter, or just plain fun.
Reverse Image Search
Capture, Reverse Image Search is a powerful capturing reverse image search tool built on top of TinEye engine.
7,271 users
Video DownloadHelper
The easy way to download and convert Web videos from hundreds of YouTube-like sites.
2,950,744 users
Cookiebro - Cookie Manager
Advanced cookie manager for easy cookie management and automatic deletion of unwanted cookies. Supports whitelist & blacklist and provides an easy-to-use interface for whitelisting domains. View, Edit, Create, Search cookies in Cookie Editor.
7,424 users
YouTube Control Center
YouTube Control Center is an open-source project that aims to enhance the overall YouTube experience by providing the end user with more control in what the playback process is concerned.
6,236 users
Gesturefy
Customizable mouse gesture add-on, which supports over 60 different commands and additional features like rocker and wheel gestures.
121,259 users
Clippings
Save frequently-entered text for pasting later.
38,145 users
Tomato Clock
Tomato Clock is a simple browser extension for managing your productivity.
15,611 users
Impulse Blocker
Block distracting websites when you are browsing the web. You can list websites that you don't want to visit in the settings. You can pause or turn off the blocker quickly. Completely open source.
6,208 users
Enhancer for YouTube™
Tons of features to improve your user experience on YouTube™.
514,003 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.
43,314 users
Iridium for YouTube
YouTube with more freedom
15,480 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!)
16,682 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.
12,588 users
RSSPreview
Preview RSS feeds in browser
4,502 users
Feed Preview
Indicates available RSS and Atom feeds and renders previews.
2,971 users
mPage
Simple dashboard-like RSS feed reader.
699 users