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

Log in

13,716 extensions found in Web Development

Filter results
Search results
  • SEO X-Ray

    SEO X-Ray

    Comprehensive SEO analysis tool that reveals what search engines see on your pages

    esteve

    3 users

  • QuickSnap - Screenshot Tool

    QuickSnap - Screenshot Tool

    Capture visible tab, full page, or selected area screenshots instantly.

    Derrick Oduor

    3 users

  • Twitch API Injector

    Twitch API Injector

    Inject client id and access token in api requests (and automatically refresh access token)

    swiftyspiffy

    3 users

  • AIChat-Hub

    AIChat-Hub

    聚合 11 家国内外大模型，一键切换 AI 工作台

    狐说

    3 users

  • WordPress Plugin Rating Trends

    WordPress Plugin Rating Trends

    Shows a 12-month rating trend chart on WordPress.org plugin pages

    Presskopp

    3 users

  • ASCII Table

    ASCII Table

    Displays an ASCII Table 0-255 on click: Dec, Hex, Char.

    Libor Benes (Dr. B)

    3 users

  • PX to CM

    PX to CM

    Easily convert PX to CM and CM to PX.

    CSS Unit Converter

    3 users

  • Disable Brotli Compression

    Disable Brotli Compression

    Disables Brotli compression by removing "br" from Accept-Encoding HTTP header

    John Galt

    3 users

  • Refined Saved Replies

    Refined Saved Replies

    Adds a repository's .github/replies.yml to GitHub's Saved Replies feature.

    JoshuaKGoldberg

    3 users

  • D3Metrics

    D3Metrics

    Checks a website for Google Tag Manager, Google Analytics and Facebook Pixel. If found, it will display the account ID for each platform.

    D3

    3 users

  • Croma – Color Picker

    Croma – Color Picker

    Pick any color from any webpage. Minimalist and powerful.

    Earning_Edge

    3 users

  • Hack the Form

    Hack the Form

    A useful add-on for web developers to view hidden inputs in form for testing purposes at the click of a button to show/hide hidden fields.

    7s26simon

    3 users

  • TableFlow

    TableFlow

    从网页表格中提取、预览、去重并导出数据

    pikachuprogrammer01

    3 users

  • Browser MCP Bridge

    Browser MCP Bridge

    Companion extension for the Browser MCP server: lets an MCP client control every tab (DOM, selectors, network, typing & clicking).Companion extension for the open-source Browser MCP server. It exposes the current Firefox session over a local WebSocke

    HarshXor

    3 users

  • copilot.microsoft.com Wide Content Toggle

    copilot.microsoft.com Wide Content Toggle

    Toggle max-width between ~ 760px/1200px on copilot.microsoft.com for Copilot Chat

    Dan

    3 users

  • Tab Saver - Sekmeleri Yedekleme

    Tab Saver - Sekmeleri Yedekleme

    TabSaver automatically or manually backs up, organizes, and restores your browser tabs. It removes duplicate tabs and offers cloud sync, encrypted vault, automatic backups, smart categories, and multilingual support.

    Halil Sarıkaş

    3 users

  • QR Code Grabber

    QR Code Grabber

    Generate and download QR codes for any webpage

    MalkyMcCallum

    3 users

  • Github Assistant

    Github Assistant

    Adds a browser GitHub comments icon to the toolbar.

    swistak

    3 users

  • Arcane Scout — API Pentesting

    Arcane Scout — API Pentesting

    A professional Chrome DevTools extension for API traffic inspection and web pentesting.

    mateocallec

    3 users

  • Custom Font Override

    Custom Font Override

    Force all pages to use yourUsed to handle font exceptions in non-standard languages and scripts. preferred font with automatic fallback for missing glyphs

    malik

    3 users

  • OpenModHeader

    OpenModHeader

    Add, rewrite, and remove HTTP request and response headers. Organise rules into profiles and scope them with URL filters.

    Multivalence

    3 users

  • AI-Powered Web Narrator

    AI-Powered Web Narrator

    AI-driven natural voice reading for online content.

    Zaara Duke

    3 users

  • YouTube Focus Mode

    YouTube Focus Mode

    Remove all distractions from YouTube. Watch without noise.

    Youtube-Focus

    3 users

  • HackBar

    HackBar

    A HackBar for google chrome/firefox browser. Small tool for pentesting websercurity.

    HAYWIN

    3 users

  • Table View Enhancer

    Table View Enhancer

    Initial Firefox release. Adds a customizable "scroll to bottom" button to Filefast tables and persists ad-hoc filter/sort settings in restricted views.

    Metamar Marble

    3 users