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

Log in

12,250 extensions found in Web Development

Filter results
Search results
  • DevKit Site Scanner

    DevKit Site Scanner

    Check for broken links on any website directly from your browser

    rezero-rich

    1 user

  • Link Target & Status Checker

    Link Target & Status Checker

    Checks if links open in a new tab, highlights them, excludes menus/footers, and detects broken links (404).

    Girraj Maheshwari

    1 user

  • Atlantis Quick SEO Audit

    Atlantis Quick SEO Audit

    Free SEO checker tool. Instantly audit any webpage for meta tags, headings, alt text, HTTPS security, and more. Get a score out of 7 with one click. Built by Atlantis Web Agency.

    wehave1problem

    1 user

  • Reddit Thread to ChatGPT

    Reddit Thread to ChatGPT

    Adds a floating button on Reddit threads that sends visible posts and comments to ChatGPT for quick AI analysis.

    Vedant

    1 user

  • Usearly – Feedback Assistant

    Usearly – Feedback Assistant

    Usearly – Partagez vos feedbacks, signalements, suggestions et de coup de cœur sur les sites web directement depuis votre navigateur.

    Usearly

    1 user

  • Web Notes Sidebar

    Web Notes Sidebar

    Take and save notes directly in a sidebar for each website.

    88CLB

    1 user

  • Network Interceptor

    Network Interceptor

    Intercept, mock, redirect, block, delay, and modify network requests — no proxy or backend changes needed.

    Dheeraj Kumar

    1 user

  • 代理切换器 (Proxy Switcher)

    代理切换器 (Proxy Switcher)

    一个简单的代理切换工具，没有太多功能，专注最基本的功能。

    cn_d2550

    1 user

  • Savior

    Savior

    A devtool for easily exporting requests that can be shared with developers

    Eline H

    1 user

  • ZWCS - Zero-Width Characters Steganography

    ZWCS - Zero-Width Characters Steganography

    A browser extension for utilizing text steganography with zero-width characters for covert communication. Includes an option for symmetric encryption.

    v1sc0

    1 user

  • AutomatR

    AutomatR

    AutomatR

    Automatr

    1 user

  • Localhost Shortcut

    Localhost Shortcut

    Open localhost ports from the Firefox address bar using the l keyword.

    Kees Kroep

    1 user

  • D365 Dev Tools

    D365 Dev Tools

    Unofficial developer toolkit for Microsoft Dynamics 365 Finance Operations and Business Central.

    Dimas Syauqi

  • AI Compare - 多模型并排对比

    AI Compare - 多模型并排对比

    输入文本同步，支持 DeepSeek、Kimi、智谱、通义千问、豆包、MiniMax 等国内多款 AI 模型

    Mr. Wen

  • frame capture

    frame capture

    Capture full-page screenshots or selected regions with an intuitive overlay tool. Capture, copy, download, or annotate directly from the popup.

    claerto

  • Blend In and Spoof Everything

    Blend In and Spoof Everything

    Pretend to be using only the most popular fonts, display, network API, and device properties. Always 100% battery, spoof video card, and more.

    BrowserPlugs

    1 user

  • Tune Finder

    Tune Finder

    Our powerful tune finder helps you find song by lyrics instamtly even when you only remember a few words. Get full song lyrics and translations quickly and easily with our smart search tool.

    FindTuneByLyrics.Com

    1 user

  • Ultimate Color Picker

    Ultimate Color Picker

    Pick colors from any page or screen, get 11 color formats, explore harmonies and variations, and export to Tailwind, Figma, and CSS.

    Paint Color Consultants

    1 user

  • Swagger Auto Auth Saver

    Swagger Auto Auth Saver

    Swagger Auto Auth Saver by click

    Nikita Korevo

    1 user

  • Tab Close on Escape

    Tab Close on Escape

    Closes the current tab when the Escape key is pressed

    citzseat

    1 user

  • Word Frequency Inspector

    Word Frequency Inspector

    Analyze word frequency patterns on any webpage to understand text composition and writing style.

    Ug88win

    1 user

  • Biqli URL Shortener

    Biqli URL Shortener

    A simple extension to shorten links using your biq.li account.

    BIQLI LLC

    1 user

  • minus.js

    minus.js

    A whole host of JS shortcuts, for the DOM hacker. For instance, with minus.js, you may type `m.q(` instead of `document.querySelector(`. There are many other shortcuts listed here: https://github.com/ryanpcmcquen/minus.js/blob/master/README.md

    Ryan P. C. McQuen

    1 user

  • Apc Gmail

    Apc Gmail

    Adiciona cor na Linha TR de mensagens com Estrela

    Lixo Apc

    1 user

  • Doc Detective Companion

    Doc Detective Companion

    CSS selector helper and test builder.

    hawkeyexl

    1 user