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

Log in

5,882 extensions found in Web Development

Filter results
Search results
  • Elasticvue

    Elasticvue

    Elasticvue is a free and simple elasticsearch gui for your browser

    Carsten König

    5,306 users

  • Native MPEG-Dash + HLS Playback

    Native MPEG-Dash + HLS Playback

    Allow the browser to play HLS (m3u8) or MPEG-Dash (mpd) video urls 'natively'. This is a fork of Native HLS with additional features. Click on any m3u8 or mpd link inside Firefox to play it directly in a new tab

    David Cavar

    5,304 users

  • FlashPlayer - SWF to HTML

    FlashPlayer - SWF to HTML

    Open SWF links of Adobe Animate (Flash) in a pure sandboxed JavaScript emulator

    Chandler Stimson

    4,984 users

  • Ui.Vision

    Ui.Vision

    Open-source Ui.Vision is RPA software for task & test automation. It is 3 tools in 1: Visual BROWSER automation with Selenium IDE import/export, 2: Visual DESKTOP automation and 3: (optional) Prompting with integrated Anthropic Claude Computer Use

    Ui.Vision Open-Source RPA Software

    4,872 users

  • SVG Gobbler

    SVG Gobbler

    Download and optimize icons, logos, and vector SVGs from websites. SVG Gobbler hunts down the SVG content in your current tab, highlights unique attributes about it and gives you the option to download or copy to clipboard.

    Ross Moody

    4,838 users

  • FindSomething

    FindSomething

    Find interesting things in the webpage's source code or JavaScript

    residual.laugh

    4,836 users

  • CSSViewer

    CSSViewer

    A simple yet powerful CSS property viewer. For Firefox Quantum

    Mohsen Khanpour

    4,789 users

  • simple-modify-headers

    simple-modify-headers

    The extension rewrite the header (request or response) based on a rules table. It 's possible to add, modify or remove header fields for a choosen url pattern. It's possible to import/export the configuration

    Didierfred

    4,756 users

  • Pomodoro clock extension

    Pomodoro clock extension

    A simple pomodoro clock to hack your productivity.

    macmorning

    4,668 users

  • Random User-Agent (Switcher)

    Random User-Agent (Switcher)

    Automatically change the user agent after a specified period of time to a randomly selected one, thus hiding your real user agent

    Paramtamtam

    4,661 users

  • WebRTC Control

    WebRTC Control

    Have control over WebRTC (disable or enable) and protect your IP address.

    Bernard

    4,619 users

  • RusVPN - Free VPN

    RusVPN - Free VPN

    RusVPN - Free VPN Proxy service

    Iron Media

    4,612 users

  • Page Screenshot

    Page Screenshot

    Take a screenshot from the entire website with just one click.

    Bernard

    4,590 users

  • Language Switch

    Language Switch

    Allows to change the language identifier sent to webservers to whatever language you need.

    Manuel Reimer

    4,427 users

  • SelectorsHub

    SelectorsHub

    xPath plugin to generate, write and verify xpath & cssSelector. It auto generates all kinds of relative xpath, axes xpath, index xpath, css selector.

    Sanjay Kumar | SelectorsHub Founder

    4,411 users

  • XML Viewer Plus

    XML Viewer Plus

    A powerful XML Viewer, supports text/regex and jQuery/CSS, XPath selectors

    Francesco De Stefano

    4,409 users

  • WCAG Contrast checker

    WCAG Contrast checker

    Checks for compliance with the contrast levels of foreground and background colors combination based on the requirements of WCAG 2.2

    Rumoroso

    4,393 users

  • Open With

    Open With

    Quickly test out your web pages in Chrome, Edge, Safari, or Opera. Open With opens the current page in your other browsers with just two clicks.

    Geoff Lankow

    4,344 users

  • Grepper

    Grepper

    The Query & Answer System for the Coder Community

    codegrepper.com

    4,341 users

  • Open in Tor Browser

    Open in Tor Browser

    Open current page or link in tor browser for better privacy

    Andy Portmen

    4,339 users

  • retire.js

    retire.js

    Scanning website for vulnerable js libraries.

    Francesco De Stefano

    4,283 users

  • ColorFish 🐠 Color Picker

    ColorFish 🐠 Color Picker

    Open-Source Color Picker for Websites and Desktop Apps. With ColorFish you can get a color reading from any point in your browser and desktop. ColorFish is the only eyedropper browser extension with desktop color selection support.

    Ui.Vision Open-Source RPA Software

    4,247 users

  • Octotree - GitHub code tree

    Octotree - GitHub code tree

    GitHub on steroids

    Team Octotree

    4,190 users

  • Pretty XML

    Pretty XML

    Pretty XML is a browser-based XML viewer

    Emile Fugulin

    4,105 users

  • Ahrefs SEO Toolbar: On-Page and SERP Tools

    Ahrefs SEO Toolbar: On-Page and SERP Tools

    On-page SEO report, broken link checker, redirect tracer, and country changer for SERP in one add-on. If you have an active account at ahrefs.com, you will also get instant access to Page, Domain, and keyword metrics via your Ahrefs account.

    Ahrefs

    4,076 users