Extensions are like apps for your browser.

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

Featured extensions
  • New Tab Override (WebExtension)

    New Tab Override (WebExtension)

    New Tab Override brings back the ability to change the page which is shown when opening a new tab.

    93.330 users

  • Country Flags & IP Whois

    Country Flags & IP Whois

    Displays country flag of website's server location, Whois and Geo info on a browser addressbar icon

    22.021 users

  • Clippings


    Save frequently-entered text for pasting later.

    33.991 users

  • Privacy Badger

    Privacy Badger

    Automatically learns to block invisible trackers.

    541.583 users

Productivity extensions
  • Gesturefy


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

    116.180 users

  • Clippings


    Save frequently-entered text for pasting later.

    33.991 users

  • Tomato Clock

    Tomato Clock

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

    15.984 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.

    6.417 users

Featured themes
YouTube boosters
  • Enhancer for YouTube™

    Enhancer for YouTube™

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

    505.816 users

  • Turn Off the Lights

    Turn Off the Lights

    La pàgina sencera s'enfosquirà, així podrà veure els vídeos com si fos al cinema.

    42.725 users

  • Iridium for YouTube

    Iridium for YouTube

    YouTube with more freedom

    14.699 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!)

    16.766 users

Feed readers
  • 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.

    12.076 users

  • RSSPreview


    Preview RSS feeds in browser

    4.679 users

  • Feed Preview

    Feed Preview

    Indicates available RSS and Atom feeds and renders previews.

    2.965 users

  • mPage


    Simple dashboard-like RSS feed reader.

    721 users