Extensions are like apps for your browser.
They add features to Firefox to make browsing faster, smarter, or just plain fun.
Country Flags & IP Whois
Displays country flag of website's server location, Whois and Geo info on a browser addressbar icon
22,982 users
Authenticator
Authenticator generates 2-Step Verification codes in your browser.
9,353 users
Translate Now
Right click a selection, page or link to translate words in Firefox.
17,040 users
Easy Youtube Video Downloader Express
WORKS WITH NEW YOUTUBE LAYOUT, "Best Youtube Video Downloader", Only one with 1080p Full-HD and 256kbps MP3 Direct Links. A clean, fast and simple addon for superfast and easy downloads in FLV, 3GP, MP3, MP4, 720p, 1080p qualities on Youtube pages.
402,830 users
Gesturefy
Customizable mouse gesture add-on, which supports over 60 different commands and additional features like rocker and wheel gestures.
118,614 users
Clippings
Save frequently-entered text for pasting later.
36,350 users
Tomato Clock
Tomato Clock is a simple browser extension for managing your productivity.
15,192 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.
6,101 users
Enhancer for YouTube™
Tons of features to improve your user experience on YouTube™.
507,417 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.
42,812 users
Iridium for YouTube
YouTube with more freedom
15,317 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!)
16,528 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.
12,299 users
RSSPreview
Preview RSS feeds in browser
4,418 users
Feed Preview
Indicates available RSS and Atom feeds and renders previews.
2,909 users
mPage
Simple dashboard-like RSS feed reader.
684 users