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

RECOMMENDED

Custom Scrollbars

Get the mouse scrollbar you've always wanted—specify width and color.
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
Privacy & Security extensions
Privacy & Security extensions
See staff picks
Tab managers
Tab managers
See staff picks
The joy of creating themes
The joy of creating themes
Learn more
Extension starter pack
  • Privacy Badger

    Privacy Badger

    Automatically learns to block invisible trackers.

    1,489,332 users

  • Enhancer for YouTube™

    Enhancer for YouTube™

    Take control of YouTube and boost your user experience!

    666,729 users

  • Grammar and Spell Checker - LanguageTool

    Grammar and Spell Checker - LanguageTool

    With this extension you can check text with the free style and grammar checker LanguageTool. It finds many errors that a simple spell checker cannot detect, like mixing up there/their, a/an, or repeating a word.

    392,474 users

  • Search by Image

    Search by Image

    A powerful reverse image search tool, with support for various search engines, such as Google, Bing, Yandex, Baidu and TinEye.

    372,382 users

Creativity extensions
  • LeechBlock NG

    LeechBlock NG

    LeechBlock NG is a simple productivity tool designed to block those time-wasting sites that can suck the life out of your working day. All you need to do is specify which sites to block and when to block them.

    81,713 users

  • Grammar and Spell Checker - LanguageTool

    Grammar and Spell Checker - LanguageTool

    With this extension you can check text with the free style and grammar checker LanguageTool. It finds many errors that a simple spell checker cannot detect, like mixing up there/their, a/an, or repeating a word.

    392,474 users

  • Search by Image

    Search by Image

    A powerful reverse image search tool, with support for various search engines, such as Google, Bing, Yandex, Baidu and TinEye.

    372,382 users

  • Dictionary Anywhere

    Dictionary Anywhere

    View definitions easily as you browse the web. Double-click any word to view its definition in a small pop-up bubble. It also supports Spanish, German, French language alongside English. Enjoy Reading Uninterrupted!!!.

    44,208 users

Steam enhancers
  • SteamDB

    SteamDB

    Adds SteamDB links and new features on the Steam store and community. View lowest game prices and stats.

    60,053 users

  • Augmented Steam

    Augmented Steam

    Augments your Steam Experience

    58,717 users

  • Steam URL Opener

    Steam URL Opener

    Allows you to open URLs inside Steam Client to save the hassle of logging in normal browser (with a single click on a button).

    5,153 users

  • ProtonDB for Steam

    ProtonDB for Steam

    Shows ratings from protondb.com on Steam

    3,294 users

“facebook” tagged extensions
  • Feedbro

    Feedbro

    Advanced Feed Reader - Read news & blogs or any RSS/Atom/RDF source.

    47,244 users

  • Emoji

    Emoji

    It permits just with a single click to copy an emoji. There is a search-box and the "Most used emojis" section (the first one). If you want to send feedback or report bug, please contact me: https://www.emojiaddon.com/help

    37,505 users

  • Facebook Container

    Facebook Container

    Prevent Facebook from tracking you around the web. The Facebook Container extension for Firefox helps you take control and isolate your web activity from Facebook.

    1,022,090 users

  • Global Speed

    Global Speed

    Set a default speed for video and audio.

    65,255 users