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

Log in

14,772 extensions found in Web Development

Filter results
Search results
  • REST API Client Tester

    REST API Client Tester

    🚀 A Postman‑like API client that works on Firefox desktop & Android

    onyxwizard

    120 users

  • CSS Reload

    CSS Reload

    Simplifies stylesheets reload of the current page.

    Стоян Димитров

    120 users

  • Pixify: Image Scraping Tool

    Pixify: Image Scraping Tool

    Pixify Chrome Extension effortlessly scrape, organize, and download images from any webpage with this fast, secure, and user-friendly extension.

    Zxtechx

    120 users

  • LeetCode to Russian

    LeetCode to Russian

    Перевод задач LeetCode на русский язык

    Никита

    119 users

  • Subdomain Finder

    Subdomain Finder

    Enumerates subdomains, directories, shows website IP, and checks for robots.txt

    Sumalya Chatterjee

    118 users

  • Visão Lógica Workspace

    Visão Lógica Workspace

    Extensão desenvolvida por Visão Lógica

    Gustavo Moraes

    117 users

  • Auto Flow for Google Labs

    Auto Flow for Google Labs

    Custom Auto Flow extension specifically designed for automated batch generation on Google Labs (ImageFX/VideoFX).

    Appsmmo

    117 users

  • Fullscreen

    Fullscreen

    Fullscreen extension.

    jhony sar

    117 users

  • Speed Test Internet

    Speed Test Internet

    Check internet download/upload speed

    Firefox addon Free

    117 users

  • SSO Tracer: SAML & OIDC Debugger

    SSO Tracer: SAML & OIDC Debugger

    Trace and decode SAML & OIDC login flows to pinpoint SSO failures (redaction on by default).

    Ninjalabs

    117 users

  • Скриншот на VFL.Ru

    Скриншот на VFL.Ru

    С помощью этого дополнения вы можете создать скриншот (снимок) страницы и моментально разместить его на фотохостинге VFL.Ru, получив ссылку на страницу с созданным скриншотом, которую можно отправить тем, кому вы хотели бы показать скриншот.

    VFL.Ru

    116 users

  • AddHeader

    AddHeader

    add header This add-on would add custom header to HTTP requests. We can add headers to all requests or specific request for certain sites.

    Firefox user 13564830

    116 users

  • Codex Browser Bridge

    Codex Browser Bridge

    Use Codex with a local browser automation bridge.

    MacWulf

    116 users

  • defyFormValidation

    defyFormValidation

    Deactivates HTML5 form validation for testing server-side or alternative client-side (e.g. JavaScript-based) validation methods.

    Christian Raue

    116 users

  • AI Chat Export/Share

    AI Chat Export/Share

    Share and export your AI chats from Claude, ChatGPT, Gemini, LeChat, DeepSeek, and Qwen with one click

    Maaren

    116 users

  • Cookie & User-Agent Extractor

    Cookie & User-Agent Extractor

    Extract cookie and user-agent from active tab (click to pop up), and copy button in 1 click

    Adhie

    116 users

  • Codeforces Lite

    Codeforces Lite

    Codeforces Lite enhances competitive programming with a dark theme, advanced code editor, and built-in code execution. Write, test, and submit solutions directly from problem pages with syntax highlighting and smart code storage.

    Devendra Suryavanshi

    116 users

  • Download Reddit™ Videos

    Download Reddit™ Videos

    RedditVideodl.com allows you to download Reddit videos with Sound in HD Formats.

    redditvideodl.com

    116 users

  • My IP

    My IP

    This extension will give you information about your current IP address.

    Tatami-web

    115 users

  • New Tab Suspender v2

    New Tab Suspender v2

    A very lightweight tab suspender to suspend inactive tabs that reduces an overall memory usage of firefox, uses a firefox native discard api

    TabSuspender

    115 users

  • IP to Country Flag & My IP- WhatIsMyIP.click

    IP to Country Flag & My IP- WhatIsMyIP.click

    IP to Country Flag - WhatIsMyIP.click Display the IP and Country information of the currently viewed website and also display your external IP address.

    Eria IO

    115 users

  • Image ALT

    Image ALT

    Check all image elements have an ALT attribute either empty for decoration or a accessible name.

    Deafinitive

    115 users

  • Check Wordpress Version

    Check Wordpress Version

    Check what version of WordPress a web page is powered by

    Francesco De Stefano

    115 users

  • HeaderTools - Inject and Edit Request Headers

    HeaderTools - Inject and Edit Request Headers

    HeaderTools is a versatile and user-friendly extension designed to provide users the capability to manipulate and inject request headers based on regex domain selectors.

    Darren Anderson

    115 users

  • vt-autologin

    vt-autologin

    A Firefox-Extension for auto login to various pages. It can be used when building a kiosk-device.

    VANTAiO Development

    115 users