To use Android extensions, you'll need Firefox for Android. To explore Firefox for desktop add-ons, please visit our desktop site.

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  • Dark Reader

    Dark Reader
    Yelha

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

    Dark Reader Ltd

    1 264 446 iseqdacen

  • Stylus

    Stylus
    Yelha

    Redesign your favorite websites with Stylus, an actively developed and community driven userstyles manager. Easily install custom themes from popular online repositories, or create, edit, and manage your own personalized CSS stylesheets.

    Stylus Team

    129 316 iseqdacen

  • Chrome Mask

    Chrome Mask
    Yelha

    Makes Firefox wear a mask to look like Chrome to websites that block Firefox otherwise.

    skyschub

    52 394 iseqdacen

  • Tampermonkey

    Tampermonkey

    Tampermonkey is the world's most popular userscript manager.

    Jan Biniok

    750 790 iseqdacen

  • ColorZilla

    ColorZilla

    Advanced Eyedropper, Color Picker, Gradient Generator and other colorful goodies...

    Alex Sirota

    125 952 iseqdacen

  • Cookie-Editor

    Cookie-Editor

    Cookie-Editor lets you efficiently create, edit and delete a cookie for the current tab. Perfect for developing, quickly testing or even manually managing your cookies for your privacy.

    cgagnier

    124 968 iseqdacen

  • Ruffle - Flash Emulator

    Ruffle - Flash Emulator

    Putting Flash back on the web. Designed to be easy to use, this extension will seamlessly enable you to play flash content, with no extra configuration required!

    Ruffle

    77 222 iseqdacen

  • User-Agent Switcher

    User-Agent Switcher

    Easily override the browser’s User-Agent string

    ntninja

    59 803 iseqdacen

  • Cookie Quick Manager

    Cookie Quick Manager

    An addon to manage cookies (view, search, create, edit, remove, backup, restore, protect from deletion and much more). Firefox 57+ is supported.

    Ysard

    44 495 iseqdacen

  • Bato Image Auto-Fixer

    Bato Image Auto-Fixer

    Detect broken bato.to images and automatically fix them.

    RaidenOQ

    34 407 iseqdacen

  • WhatFont

    WhatFont

    A wrapper for Chengyin Liu's WhatFont tool

    Zack Michener

    32 324 iseqdacen

  • Disable JavaScript

    Disable JavaScript

    Adds the ability to disable JavaScript for specific sites or specific tabs. You can customize the default JS state (on or off), the disable behavior (by domain or by tab) and much more.

    Yubabul Tksbbd

    30 373 iseqdacen

  • Disable WebRTC

    Disable WebRTC

    WebRTC leaks your actual IP addresses from behind your VPN, by default.

    Chris Antaki

    21 221 iseqdacen

  • Google Lighthouse

    Google Lighthouse

    Lighthouse is an open-source, automated tool for improving the performance, quality, and correctness of your web apps.

    Google Lighthouse

    14 439 iseqdacen

  • JavaScript Toggle On and Off (WebExtension)

    JavaScript Toggle On and Off (WebExtension)

    Toggle JavaScript engine on and off the easy way

    tlintspr

    12 037 iseqdacen

  • My IP Hider VPN

    My IP Hider VPN

    My IP Hider VPN is number one tool for hiding your IP and unblocking any web site! If your Firefox version is less then 55 please install older My IP Hider VPN from "Version History" (https://goo.gl/7ZQQjZ)

    MyIpHider.com

    11 715 iseqdacen

  • RESTED

    RESTED

    A REST client for the rest of us

    Eline H

    11 373 iseqdacen

  • Netmirror Extension

    Netmirror Extension

    Add, modify or remove a header for any request.

    Netmirror

    10 816 iseqdacen

  • Save Screenshot

    Save Screenshot

    Saves the current page as image file or copies it to clipboard.

    Manuel Reimer

    10 543 iseqdacen

  • JSON Lite

    JSON Lite

    Fast JSON viewer - highlights, shows items count/size, handles large files

    Lauri Rooden

    9 441 iseqdacen

  • Empty Cache Button

    Empty Cache Button

    Cache clearing made easy. One click.

    mvm

    9 353 iseqdacen

  • ScriptCat

    ScriptCat

    Everything can be scripted, allowing your browser to do more!

    王一之

    8 819 iseqdacen

  • Proxy Toggle

    Proxy Toggle

    Toggle between direct connection and a single proxy server via a toolbar icon.

    Richard West

    8 818 iseqdacen

  • MobiDevTools

    MobiDevTools

    A mobile devtools for debugging web sites and applications with the console, DOM, network info, sources, and more.

    Francesco De Stefano

    7 702 iseqdacen

  • IPvFoo

    IPvFoo

    Display the server IP address, with a realtime summary of IPv4, IPv6, and HTTPS information across all page elements.

    Paul Marks

    7 130 iseqdacen