2609 apps in web-development

Ghostery – Privacy Ad Blocker

Ghostery is a powerful privacy extension. Block ads, stop trackers and speed up websites.

Dark Reader

Dark mode for every website. Take care of your eyes, use dark theme for night and daily browsing.

NoScript Security Suite

The best security you can get in a web browser! Allow potentially malicious web content to run only from sites you trust. Protect yourself against XSS other web security exploits.

FoxyProxy Standard

FoxyProxy is an advanced proxy management tool that completely replaces Firefox's limited proxying capabilities. For a simpler tool and less advanced configuration options, please use FoxyProxy Basic.

React Developer Tools

React Developer Tools is a tool that allows you to inspect a React tree, including the component hierarchy, props, state, and more. To get started, just open the Firefox devtools and switch to the "⚛️ Components" or "⚛️ Profiler" tab.


Make the web faster, more private, and more secure.


Identify technologies on websites

Web Developer

The Web Developer extension adds various web developer tools to the browser.

Windscribe - Free VPN and Ad Blocker

Windscribe helps you circumvent censorship, block ads, beacons and trackers on websites you use every day.

Vue.js devtools

DevTools extension for debugging Vue.js applications.

Download All Images

Easily save images with a wide range of customization features, such as file size, dimensions, and image type.

Tab Reloader (page auto refresh)

An easy-to-use tab reloader with custom reloading time settings for individual tabs

User-Agent Switcher and Manager

Spoof websites trying to gather information about your web navigation—like your browser type and operating system—to deliver distinct content you may not want.


Redesign your favorite websites with Stylus, an actively developed and community driven userstyles manager. Easily install custom themes from popular online repositories, or create, edit, and manage your own personalized CSS stylesheets.


Violentmonkey provides userscripts support for browsers.
It's open source!

Clear Cache

Clear browser cache with a single click or via the F9 key.

F9 Fever! ;)

Cookie Quick Manager

An addon to manage cookies (view, search, create, edit, remove, backup, restore, protect from deletion and much more). Firefox 57+ is supported.

Proxy SwitchyOmega

Manage and switch between multiple proxies quickly & easily.


Cookie-Editor lets you efficiently create, edit and delete a cookie for the current tab. Perfect for developing, quickly testing or even manually managing your cookies for your privacy.

Redux DevTools

DevTools for Redux with actions history, undo and replay.

Stylish - Custom themes for any website

Stylish lets you customize any website with custom user styles (themes for websites). Choose from the largest userstyles library to change the color scheme, background, and skin for Google, Facebook, YouTube and many, many more sites.

User-Agent Switcher

Easily override the browser's User-Agent string

RESTClient, a debugger for RESTful web services.

RESTClient has been completely rewritten for compatible with Firefox 57. Some functions are still missing (OAuth & OAuth 2.0 authentication).

Disable JavaScript

Adds the ability to disable JavaScript for specific sites or specific tabs.
You can customize the default JS state (on or off), the disable behavior (by domain or by tab) and much more.

User-Agent Switcher

Quickly and easily switch between popular user-agent strings.


A wrapper for Chengyin Liu's WhatFont tool

Allow Right-Click

Re-enable the possibility to use the context menu on sites that overrides it

Media Converter and Muxer - Audio Tools

Easy to use video and audio converter and muxer written in WebExtension built on top of the well-known FFmpeg converter


View JSON documents in the browser.


Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.