Extensions are like apps for your browser.

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

Recommended extensions
  • Block Site

    Block Site

    A customizable password protected website blocker and redirector

    9,729 users

  • Popup Blocker (strict)

    Popup Blocker (strict)

    Strictly block all popup requests from any website by default. A notification window is opened to allow you accept, reject, open the popup in background page, or redirect the current page to popup address

    30,960 users

  • Image Search Options

    Image Search Options

    Image Search Options provides a set of highly customizable reverse image search context menu options.

    44,965 users

  • Smart HTTPS

    Smart HTTPS

    Automatically changes HTTP addresses to the secure HTTPS, and if loading encounters error, reverts it back to HTTP.

    16,623 users

Popular themes
Enhanced privacy extensions
  • Privacy Badger

    Privacy Badger

    Automatically learns to block invisible trackers.

    539,100 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.

    594,896 users

  • Decentraleyes

    Decentraleyes

    Protects you against tracking through "free", centralized, content delivery. It prevents a lot of requests from reaching networks like Google Hosted Libraries, and serves local files to keep sites from breaking. Complements regular content blockers.

    178,966 users

  • Firefox Multi-Account Containers

    Firefox Multi-Account Containers

    Firefox Multi-Account Containers lets you keep parts of your online life separated into color-coded tabs that preserve your privacy. Cookies are separated by container, allowing you to use the web with multiple identities or accounts simultaneously.

    192,369 users

Popular extensions
  • uBlock Origin

    uBlock Origin

    Finally, an efficient blocker. Easy on CPU and memory.

    4,648,164 users

  • Video DownloadHelper

    Video DownloadHelper

    The easy way to download and convert Web videos from hundreds of YouTube-like sites.

    2,645,033 users

  • NoScript Security Suite

    NoScript Security Suite

    The best security you can get in a web browser! Allow active content to run only from sites you trust, and protect yourself against XSS other web security exploits. Disabled and can't reinstall? https://tinyurl.com/moz-ext-cert

    1,509,872 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.

    594,896 users

Recommended themes
Recommended password managers
  • LastPass Password Manager

    LastPass Password Manager

    LastPass, an award-winning password manager, saves your passwords and gives you secure access from every computer and mobile device.

    818,478 users

  • Bitwarden - Free Password Manager

    Bitwarden - Free Password Manager

    A secure and free password manager for all of your devices.

    110,266 users

  • 1Password X – Password Manager

    1Password X – Password Manager

    The best way to experience 1Password in your browser. Easily sign in to sites, generate passwords, and store secure information, including logins, credit cards, notes, and more.

    38,879 users

  • RoboForm Password Manager

    RoboForm Password Manager

    RoboForm, the #1 ranked Password Manager makes your life easier by remembering passwords and logging you into websites automatically

    84,605 users