To use these add-ons, you'll need to download Firefox.

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LeechBlock NG

Block time-wasting websites. Block them completely or just during time frames of your choosing.
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Extensions are like apps for Firefox.

They add features to Firefox to make browsing faster, safer, or just plain fun.
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Anti-tracking extensions
Anti-tracking extensions
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Essential add-ons
Essential add-ons
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Writing tools
Writing tools
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Tab managers
  • Tree Style Tab

    Tree Style Tab

    Show tabs like a tree.

    183,935 users

  • OneTab

    OneTab

    OneTab - Too many tabs? Convert tabs to a list and reduce browser memory

    172,200 users

  • Tab Session Manager

    Tab Session Manager

    Save and restore the state of windows and tabs. It also supports automatic saving and cloud sync.

    154,320 users

  • Tab Reloader (page auto refresh)

    Tab Reloader (page auto refresh)

    An easy-to-use tab reloader with custom reloading time settings for individual tabs

    78,902 users

Gaming & media extensions
  • SponsorBlock - Skip Sponsorships on YouTube

    SponsorBlock - Skip Sponsorships on YouTube

    Easily skip YouTube video sponsors. When you visit a YouTube video, the extension will check the database for reported sponsors and automatically skip known sponsors. You can also report sponsors in videos. Other browsers: https://sponsor.ajay.app

    684,393 users

  • Return YouTube Dislike

    Return YouTube Dislike

    Returns ability to see dislike statistics on youtube

    929,500 users

  • Read Aloud: A Text to Speech Voice Reader

    Read Aloud: A Text to Speech Voice Reader

    Read out loud the current web-page article with one click. Supports 40+ languages.

    207,220 users

  • BetterTTV

    BetterTTV

    Enhances Twitch and YouTube with new features, emotes, and more.

    508,900 users

Accessibility extensions
  • Dark Reader

    Dark Reader

    Dark mode for every website. Take care of your eyes, use dark theme for night and daily browsing.

    1,302,134 users

  • Read Aloud: A Text to Speech Voice Reader

    Read Aloud: A Text to Speech Voice Reader

    Read out loud the current web-page article with one click. Supports 40+ languages.

    207,220 users

  • Dark

    Dark

    42,639 users

  • Sidebery

    Sidebery

    Vertical tabs tree and bookmarks in sidebar with advanced containers configuration, grouping and many other features.

    63,267 users

“twitch” tagged extensions
  • BetterTTV

    BetterTTV

    Enhances Twitch and YouTube with new features, emotes, and more.

    508,900 users

  • 'Improve YouTube!'  🎧 (For YouTube & Video)

    'Improve YouTube!' 🎧 (For YouTube & Video)

    Youtube Extension. Powerful but lightweight. Enrich your Youtube and content selection. Make YouTube tidy and smart! (Layout, Filters, Shortcuts, Playlist)

    110,806 users

  • Turn Off the Lights for Firefox

    Turn Off the Lights for Firefox

    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. Dark mode for all websites. It works for all known video sites such as YouTube, Vimeo, Twitch, Dailymotion, Facebook, etc.

    47,129 users

  • Adaptive Tab Bar Colour

    Adaptive Tab Bar Colour

    Changes the colour of Firefox theme to match the website’s appearance.

    36,833 users