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

Log in

10,941 extensions found in Web Development

Filter results
Search results
  • Change User-Agent

    Change User-Agent

    A Firefox extension to change the User Agent to one custom string permanently.

    amria

    112 users

  • Accessibility View

    Accessibility View

    Accessible View converts an arbitrary website into its accessibility relevant form.

    Dword Design

    112 users

  • Visual ARIA

    Visual ARIA

    Visual ARIA allows engineers, testers, educators, and students to physically observe ARIA usage within web technologies, including ARIA 1.1 structural, live region, and widget roles, proper nesting and focus management.

    Deafinitive

    112 users

  • Rinine CharacterAI Tools Lite

    Rinine CharacterAI Tools Lite

    Basic tools for charBasic tools for character AI. Lite version of Rinine CharacterAI Tools Lite version of Rinine CharacterAI Tools. Enhance your experience using the character.ai websiteacter AI. Lite version of Rinine CharacterAI Tools

    Rinine

    112 users

  • IP

    IP

    Instantly displays your public IP address, ISP, and geolocation details (city, region, country, postal code, timezone). Copy button, auto-refresh, and dark mode. No tracking, no data collection.

    eyquemro

    111 users

  • Excellent Data Filler

    Excellent Data Filler

    Fill Online Form and Scraper Data, Input, Checkbox, Select Fields, Click Button, Execute JS Script, Run Predefine Functions

    C Tech Hindi

    111 users

  • server-spy2

    server-spy2

    1. show server headers、ip. 2. show an QR code for others devices to scan.

    马云腾

    111 users

  • Base64 Codec

    Base64 Codec

    Base64 Encoder Decoder, based on contextMenu, with in-place html text replacement.

    pshekhar

    111 users

  • Mobile Device Simulator

    Mobile Device Simulator

    Simulate website appearance on various mobile devices.

    Nixon

    111 users

  • Easy to RSS

    Easy to RSS

    Retreive RSS feeds URLs from WebSite, RSSHub supported

    idealclover

    110 users

  • AWS Multi-Account Containers

    AWS Multi-Account Containers

    Manage multiple AWS accounts concurrently in separate tabs

    Nico

    110 users

  • 广告终结者2

    广告终结者2

    清除网页上的所有广告：浮动广告，购物广告，恶意弹窗，跟踪代码，视频广告，让你浏览网页更快更清爽，广告终结者，你唯一需要的广告插件

    王哥哥

    110 users

  • Hex Color Grabber

    Hex Color Grabber

    Hex Color Picker helps front-end developers quickly pick colors from any webpage when no color code or palette is provided. Hover to preview and click to copy the exact hex value. Lightweight and privacy-friendly.

    Shiraku Yanai

    110 users

  • Dark Mode

    Dark Mode

    Dark Theme For Websites

    The UNITY Empire

    109 users

  • Script Switch

    Script Switch

    Quickly enable or disable javascript for all tabs and windows with a convenient button and keyboard shortcut.

    Jordan Majd

    109 users

  • defyFormValidation

    defyFormValidation

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

    Christian Raue

    109 users

  • HackBar For Quantum

    HackBar For Quantum

    HackBar Quantum is a sidebar that helps you with web application security testing. This add-on is a predecessor to the original HackBar that is not compatible with Firefox Quantum. This is still in beta phase, lots of things are yet to come :) .

    r4#51(codeblooded)

    109 users

  • Email this page

    Email this page

    This extension adds an email button to the toolbar which allows you to email the page link using your default mail client or Gmail.

    Sheikh Farooq

    108 users

  • HTML5 Gamepad Detector

    HTML5 Gamepad Detector

    This project is using HTML5 Gamepad API which can monitor your gamepads connected to your computer in a web browser.

    HKGoldenMr.A

    108 users

  • Git History

    Git History

    Esta extensión de navegador añade un botón (cuando visitas un archivo en github, gitlab, bitbucket) para que cuando lo presiones automáticamente te redirija a https://githistory.xyz/

    Luis Reinoso

    108 users

  • Scratchpad

    Scratchpad

    Replacement for the JavaScript Scratchpad editor removed in Firefox 72

    A Kistler

    108 users

  • RTL All Fixer (Right To Left Fixer)

    RTL All Fixer (Right To Left Fixer)

    Fixes right-to-left text direction issues and manages RTL sites To fix the problem of displaying Farsi and Arabic texts while chatting or working with artificial intelligence such as Chatgpt Poe DeepSeek Grok ... برای رفع مشکل نمایش متن فارسی عربی

    Dr.FATAL

    108 users

  • Open in Vivaldi

    Open in Vivaldi

    Open current page, link, or all tabs in the Vivaldi browser.

    Andy Portmen

    108 users

  • Character Identifier

    Character Identifier

    This extension adds a context menu item for selected text that provides more information (from the Unicode database) about the characters...

    L. David Baron

    108 users

  • TagCheck

    TagCheck

    Lists usage of Universal Analytics, Google Analytics 4, and Google Tag Manager on a page.

    embeddedt

    108 users