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

Log in

12,522 extensions found in Web Development

Filter results
Search results
  • Choosy

    Choosy

    Integrates Choosy with Firefox. Mac only.

    georgebrock

    378 users

  • ShotEasy - Light and easy-to-use screenshot tool

    ShotEasy - Light and easy-to-use screenshot tool

    Easily capture area, or scroll page to get a long screenshot of the full page, with Beautifier and editing tools.

    chenliwen

    378 users

  • HTTP Status Code

    HTTP Status Code

    Shows HTTP response status code as a badge icon in the toolbar.

    Ahmad Samiei

    378 users

  • YouTube Miniplayer

    YouTube Miniplayer

    Opens YouTube links in a draggable miniplayer on non-YouTube websites. Simple. Easy. No fuss.

    Bukhari

    377 users

  • File Backups

    File Backups

    TiddlyWiki html-file saving and backup, using a Tower of Hanoi strategy! Learn more at: https://pmario.github.io/file-backups/ Video: recoreded with V0.2.1 https://youtu.be/KVLtID8nElU which is slightly outdated. But overall info is OK.

    pmario

    376 users

  • Open in Brave Browser

    Open in Brave Browser

    Open current page, link, or all tabs in the Brave browser

    Brian

    376 users

  • Tailwind CSS Devtools

    Tailwind CSS Devtools

    All-in-one browser extension for Tailwind CSS Developer.

    Erwin

    376 users

  • Tracking Time Button

    Tracking Time Button

    Enhance your preferred web project manager with the Time Tracker Button and get automatic timesheets.

    TrackingTime

    376 users

  • Fingerprint Defender

    Fingerprint Defender

    Protect against browser fingerprinting with per-session noise (canvas, audio, client-rects) instead of static spoofing. Blocks WebRTC IP leaks. Passes your real GPU, browser, timezone and fonts through so you blend in rather than stand out.

    Digital Fracture

    375 users

  • AutoComplete Forms for Firefox

    AutoComplete Forms for Firefox

    Enable AutoComplete for Form elements automatically.

    Baris Derin

    374 users

  • TwineHacker

    TwineHacker

    Allows you to change font/style; also adds cheats

    biah

    374 users

  • Easy XSS

    Easy XSS

    XSS made Easy. Easy XSS makes it possible for you to text XSS with just 2 mouse clicks.

    Rohan Chavan - p5yph3r

    374 users

  • ActiveFlash

    ActiveFlash

    Modify the navigator.platform while simulating a mobile viewport

    李先生

    372 users

  • OpenSwitchMaps

    OpenSwitchMaps

    Switch map services, and some useful links for OpenStreetMap contributors

    tankaru

    371 users

  • ARIA DevTools

    ARIA DevTools

    Easily spot missing ARIA labels, misused ARIA roles, and incomplete keyboard support in your web applications.

    Mateusz Zieliński

    370 users

  • CSP Evaluator

    CSP Evaluator

    CSP Evaluator is a tool that allows developers to check if a Content Security Policy (CSP) serves as mitigation against XSS attacks. This is a Firefox port of the Chrome extension

    Hacks and Hops

    369 users

  • HTML5 Universal Speed Hack

    HTML5 Universal Speed Hack

    Speed up or slow down HTML5 and Unity games directly in the browser. Control functions like setTimeout, setInterval, Date.now, and more to precisely adjust game speed.

    Rafael Lima

    368 users

  • V2Ray Link Converter

    V2Ray Link Converter

    V2Ray Link Converter

    Valas

    366 users

  • Request Interceptor

    Request Interceptor

    Firefox extension to intercept and edit HTTP requests - now a mini Burp-like toolkit. Add rules, smart proxy routing, Intruder scans, Analytics, and URL Analyzer. Built for pentesters and developers. Dedicated to me and my dear memory SGFubmE=.

    Vahe Demirkhanyan

    366 users

  • FiddlerFox

    FiddlerFox

    Allows you to point Firefox to your fiddler instance if it doesn't refresh the proxy settings after Fiddler has started.

    Sebastiaan Dammann

    365 users

  • Mobile phone emulator - test websites

    Mobile phone emulator - test websites

    Elevate your responsive web development workflow with the ultimate Mobile Phone Emulator.

    Hizone

    365 users

  • Lunapic Image Edit

    Lunapic Image Edit

    Adds right click image editing link to images.

    lunapic

    364 users

  • Easy Favicon Scraper

    Easy Favicon Scraper

    Download the favicon of a website with 1 click

    iSheepie

    363 users

  • 定时刷新页面和触发按钮事件

    定时刷新页面和触发按钮事件

    可自定义时间定时刷新当前页面，也可以自定义按钮ID定时触发该按钮点击事件，类似按键精灵效果

    疯狂插件

    363 users

  • TestCase Studio

    TestCase Studio

    TestCase Studio record the user actions performed on a web application in English Sentences.

    Sanjay Kumar | SelectorsHub Founder

    362 users