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

Log in

7,507 extensions found in Web Development

Filter results
Search results
  • all-in-one

    all-in-one

    Facility for providing suite of tools for handling web components e.g. standard formats HTML, RSS, M3U8, and more.

    Firefox user 15314155

    127 users

  • View Page Source

    View Page Source

    Adds the ability to open the page source in a new tab via button (Desktop) or menu (Firefox for Android).

    tnh

    126 users

  • HackBar (cracked & fixed)

    HackBar (cracked & fixed)

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

    evmer

    126 users

  • AWS Multi-Account Containers

    AWS Multi-Account Containers

    Manage multiple AWS accounts concurrently in separate tabs

    Nico

    125 users

  • Allow Web Copy

    Allow Web Copy

    Ravi Prakash Yadav @ Lakshya Services.

    Lakshya Services India.

    125 users

  • CSS Reload

    CSS Reload

    Simplifies stylesheets reload of the current page.

    Стоян Димитров

    124 users

  • Respieck - Responsive Tester

    Respieck - Responsive Tester

    Respicek: Your responsive design companion. Seamlessly preview and optimize your creations across devices. Intuitive interface, ensuring pixel-perfect adaptability from smartphones to desktops. The key to effortless responsiveness.

    Sammobadi

    124 users

  • Creatio Helper

    Creatio Helper

    Adds helpful buttons to Creatio page

    moe

    123 users

  • Generator danych testowych

    Generator danych testowych

    Generator polskich danych testowych umożliwiający wygenerowanie: NIP, REGON, PESEL, IBAN, KRS, EAN, serii i nr DOWODU OSOBISTEGO, nr karty kredytowej, domyślnego tekstu w różnych długościach, ciągu znaków, danych z pliku CSV oraz danych użytkownika.

    testerzy.pl

    123 users

  • Twitch Username and User ID

    Twitch Username and User ID

    Fetch user id of a Twitch username or the username of a Twitch user id. The Firefox port of https://chrome.google.com/webstore/detail/twitch-username-and-user/laonpoebfalkjijglbjbnkfndibbcoon

    swiftyspiffy

    123 users

  • Easy QR

    Easy QR

    Easy QR code, the best QR extension. Generate offline QR Code with a simple click!

    iToolkit

    123 users

  • Cookie Helper

    Cookie Helper

    The ultimate privacy manager. Cookie Helper provides seamless integration with our native Cookie manager for macOS. Quickly and easily favorite sites, then easily remove tracking cookies, history, cache and databases for those you don't want.

    SweetP Productions, Inc.

    122 users

  • GrabzIt Web Scraping Assistant

    GrabzIt Web Scraping Assistant

    Create Web Scrapes online easier than ever before with GrabzIt’s Web Scraping Assistant.

    GrabzIt

    122 users

  • Cisco Web Communicator

    Cisco Web Communicator

    Enable Web applications integrated with Cisco Jabber voice and video to use the Cisco Web Communicator add-on.

    cisco.jabbersdk

    122 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

    121 users

  • Stay for Browser

    Stay for Browser

    Userscript manager compatible with Tampermonkey, Violentmonkey. Dark mode for every website. Stay synched on Chrome/Safari/Firefox.

    Stay Browser

    121 users

  • Epoch Converter

    Epoch Converter

    Convert unix epoch datetime to regular date format (MM/DD/YYYY) in GMT and local timezones and vice versa.

    Harsh Karn

    121 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

    120 users

  • defyFormValidation

    defyFormValidation

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

    Christian Raue

    120 users

  • BrowserStack Toolbar Toggle

    BrowserStack Toolbar Toggle

    Toggles the toolbar in Browserstack Live and App-Live

    Abhi Singh

    119 users

  • Segment Event Tracker

    Segment Event Tracker

    See when Segment, Rudderstack, Attribution and Dreamdata events are being tracked.

    MartinMouritzen

    118 users

  • Яндекс Маркет Поиск

    Яндекс Маркет Поиск

    Поиск товаров с помощью Яндекс Маркет

    aleks.ast

    118 users

  • URL Decrement Button

    URL Decrement Button

    A 1-Click URL Decrement Button for your toolbar. Works with or without URL Incrementer.

    Sixcious

    118 users

  • CSP Tester

    CSP Tester

    This extension helps web masters to test web application behaviour with Content Security Policy version 2.0 implemented.

    oxdef

    118 users

  • UploadCC: Screen Capture Tool (Share or Save)

    UploadCC: Screen Capture Tool (Share or Save)

    Simple Screen Capture Tool Select the area which you want to capture. You can choose to upload it and share with your friend or download it.

    UploadCC

    118 users