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

RECOMMENDED

LeechBlock NG

Block time-wasting websites. Block them completely or just during time frames of your choosing.
Get the extension

Extensions are like apps for Firefox.

They add features to Firefox to make browsing faster, safer, or just plain fun.
See all extensions
Productivity tools
Productivity tools
See staff picks
YouTube customization
YouTube customization
See staff picks
Privacy & Security extensions
Privacy & Security extensions
See staff picks
Top rated themes
Tab managers
  • Tabby - Window & Tab Manager

    Tabby - Window & Tab Manager

    Tabby helps you manage a lot of windows and tabs easily; it can help you open, close, move, pin, and do many other things on tabs and windows quickly. With Tabby, you can even save all you windows and tabs for later with just one click!

    22,085 users

  • Tree Style Tab

    Tree Style Tab

    Show tabs like a tree.

    224,329 users

  • Simple Tab Groups

    Simple Tab Groups

    Create, modify, and quickly change tab groups

    104,613 users

  • OneTab

    OneTab

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

    174,545 users

Twitch extensions
  • BetterTTV

    BetterTTV

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

    491,765 users

  • Alternate Player for Twitch.tv

    Alternate Player for Twitch.tv

    Alternate player of live broadcasts for Twitch.tv website.

    36,227 users

  • Twitch Chat pronouns

    Twitch Chat pronouns

    Add Pronouns to Twitch Chat

    16,117 users

  • Unwanted Twitch

    Unwanted Twitch

    Hide unwanted streams, games, categories, channels and tags on: twitch.tv

    5,853 users

“social media” tagged extensions
  • Return YouTube Dislike

    Return YouTube Dislike

    Returns ability to see dislike statistics on youtube

    885,083 users

  • Enhancer for YouTube™

    Enhancer for YouTube™

    Take control of YouTube and boost your user experience!

    679,288 users

  • Easy Youtube Video Downloader Express

    Easy Youtube Video Downloader Express

    A simple extension for superfast and easy YouTube downloads in FLV, 3GP, MP3, MP4, 720p, and 1080p formats.

    509,014 users

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

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

    Youtube Extension. Powerful but lightweight. Enrich your Youtube & content selection. Make YouTube tidy&smart! Layout Filters Shortcuts Adblocker Playlist

    56,951 users