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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  • Sci Calc

    Sci Calc

    Scientific calculator with memory trig and log functions

    enzo

  • Domain Probe

    Domain Probe

    Query A AAAA MX TXT NS records for any domain name

    Sandra Baer

  • Env Info

    Env Info

    Inspect browser environment hardware and screen details

    Galina Safronova

  • MediaGuard

    MediaGuard

    Guard your media — auto-pause when leaving tab, auto-resume on return

    GsiaBlandine

    42 iseqdacen

  • Vision Filter

    Vision Filter

    Apply deuteranopia protanopia and other vision filters

    rojas.nicole

  • PagePulse

    PagePulse

    Keep pages alive with a steady pulse — auto-reload on interval

    Duda Eleonora

    42 iseqdacen

  • UnclipImages

    UnclipImages

    Unclip constrained images and display them at their natural dimensions

    dimariktak

    42 iseqdacen

  • Ambient Noise

    Ambient Noise

    Play calming background noise for focus rain fire cafe

    ernestoh

  • MetaScope

    MetaScope

    Inspect all meta tags on the current page — SEO, OG, Twitter cards

    omyjuk

    42 iseqdacen

  • DigestBox

    DigestBox

    Digest any text to MD5/SHA hashes instantly in the toolbar

    Aexodi

    42 iseqdacen

  • Lap Timer

    Lap Timer

    Track elapsed time and record laps with a clean display

    aztpm

  • RefreshBadge

    RefreshBadge

    Track page reload count per tab with a live toolbar badge

    Zain

    42 iseqdacen

  • User Script API Gateway

    User Script API Gateway

    Allows users to inject custom scripts that can fetch data from any domain, with controlled CSP.

    datttyt

    41 iseqdacen

  • Script Menu

    Script Menu

    Select and run the registered JavaScript (userscript) from the menu. Works on Android as well as on PC. I developed this extension for Firefox for Mobile where the bookmarklets is not available. 登録したスクリプトをメニューから選択して実行します。Androidでも機能します

    yobukodori

    41 iseqdacen

  • IDB Explorer

    IDB Explorer

    Browse and manage the IndexedDB databases of any website. View, inspect, and delete records.

    Hendrix

    41 iseqdacen

  • Discord User/Channel/Message ID all get tool

    Discord User/Channel/Message ID all get tool

    This add-on has the following features All user ID retrieval All channel ID retrieval All message ID retrieval v8.0 : Fixed a bug where message ID retrieval did not work with DMs

    Gushini chick

    40 iseqdacen

  • HTML Comment Finder

    HTML Comment Finder

    Finds HTML, CSS and JavaScript comments in the current page

    VRZ

    39 iseqdacen

  • Better Page Ruler

    Better Page Ruler

    Draw, resize, drag and move a ruler box on any webpage.

    Sayedul Sayem

    39 iseqdacen

  • HTML Runner

    HTML Runner

    Run HTML, CSS, and JavaScript instantly in a new tab — no server, no build, no setup.

    Mohammad Shaklain

    37 iseqdacen

  • AI Context Courier

    AI Context Courier

    Save and share your AI chat history from ChatGPT, Gemini, AI Studio and Deepseek with one click.

    Baha Ferchichi

    37 iseqdacen

  • YouTube Snap Shotter

    YouTube Snap Shotter

    YouTube Snap Shotter enhances your YouTube browsing experience with its built-in screenshot functionality. Use the dedicated button or Shift+A shortcut to capture and save moments from videos and shorts effortlessly.

    choangclubcasino

    36 iseqdacen

  • GitHub Repository Size

    GitHub Repository Size

    Displays the size of a GitHub repository on its homepage

    Pranav Mangal

    36 iseqdacen

  • Velocity Web Speed

    Velocity Web Speed

    Optimizes and accelerates image, script, and font loading on websites to significantly improve page speed and overall performance.

    Baryo

    35 iseqdacen

  • Roblox Themes – E-ROBLOX: Animated & Static Design

    Roblox Themes – E-ROBLOX: Animated & Static Design

    E-ROBLOX is a lightweight Firefox extension that enhances Roblox with a variety of free themes, greetings, and smooth integration—safe, fast, and optimized for both PC and mobile devices.

    e-lyas

    35 iseqdacen

  • Claude Track & Export

    Claude Track & Export

    Track Claude usage, export conversations to Markdown, and jump into new chats instantly.

    Jedd

    34 iseqdacen