Extensions are like apps for your browser.

They add features to Firefox to make browsing faster, smarter, or just plain fun.

Featured extensions
  • Black Menu for Google™

    Black Menu for Google™

    The easiest access to the Google universe

    6,568 users

  • Don't touch my tabs! (rel=noopener)

    Don't touch my tabs! (rel=noopener)

    Prevent tabs opened by a hyperlink from hijacking the previous tab by adding the rel=noopener attribute to all hyperlinks (excluding same-domain hyperlinks).

    7,127 users

  • Malwarebytes Browser Extension

    Malwarebytes Browser Extension

    The fastest and safest web browsing experience.

    18,217 users

  • SoundFixer

    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!)

    16,830 users

Productivity extensions
  • Gesturefy

    Gesturefy

    Customizable mouse gesture add-on, which supports over 60 different commands and additional features like rocker and wheel gestures.

    120,058 users

  • Clippings

    Clippings

    Save frequently-entered text for pasting later.

    37,007 users

  • Tomato Clock

    Tomato Clock

    Tomato Clock is a simple browser extension for managing your productivity.

    16,492 users

  • Impulse Blocker

    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.

    6,468 users

Featured themes
YouTube boosters
  • Enhancer for YouTube™

    Enhancer for YouTube™

    Tons of features to improve your user experience on YouTube™.

    511,308 users

  • Turn Off the Lights

    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.

    43,398 users

  • Iridium for YouTube

    Iridium for YouTube

    YouTube with more freedom

    15,084 users

  • SoundFixer

    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!)

    16,830 users

Feed readers
  • Brief

    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.

    12,555 users

  • RSSPreview

    RSSPreview

    Preview RSS feeds in browser

    4,751 users

  • Feed Preview

    Feed Preview

    Indicates available RSS and Atom feeds and renders previews.

    3,079 users

  • mPage

    mPage

    Simple dashboard-like RSS feed reader.

    808 users