Extensions are like apps for your browser.
They add features to Firefox to make browsing faster, smarter, or just plain fun.
AdBlocker Ultimate
Free and improved ad blocker. Completely remove ALL ads. No "acceptable" ads or whitelisted advertisers, block tracking, block malware!
411,257 users
Malwarebytes Browser Extension
The fastest and safest web browsing experience.
17,143 users
Reverse Image Search
Capture, Reverse Image Search is a powerful capturing reverse image search tool built on top of TinEye engine.
7,100 users
Search by Image - Reverse Image Search
Reverse image search using various search engines, such as Google, Bing, Yandex, Baidu and TinEye.
67,138 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.
832,370 users
Gesturefy
Customizable mouse gesture add-on, which supports over 60 different commands and additional features like rocker and wheel gestures.
115,999 users
Clippings
Save frequently-entered text for pasting later.
33,878 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!
22,446 users
Enhancer for YouTube™
Tons of features to improve your user experience on YouTube™.
500,448 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.
42,141 users
Iridium for YouTube
YouTube with more freedom
15,234 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!)
16,222 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.
11,975 users
RSSPreview
Preview RSS feeds in browser
4,196 users
Feed Preview
Indicates available RSS and Atom feeds and renders previews.
2,790 users
mPage
Simple dashboard-like RSS feed reader.
657 users