Firefox is a free and open source web browser developed by Mozilla Foundation. First released in 2002 under the name Phoenix. It’s available for most operating systems including Windows, macOS, Linux and most phones and tablets.

Here are 4,863 public repositories matching this topic...

puppeteer / puppeteer

JavaScript API for Chrome and Firefox

testing firefox chrome automation web chromium developer-tools node-module headless-chrome

Updated Mar 16, 2026
TypeScript

microsoft / playwright

Playwright is a framework for Web Testing and Automation. It allows testing Chromium, Firefox and WebKit with a single API.

electron javascript testing firefox chrome automation web test chromium test-automation testing-tools webkit end-to-end-testing e2e-testing playwright

Updated Mar 17, 2026
TypeScript

gorhill / uBlock

uBlock Origin - An efficient blocker for Chromium and Firefox. Fast and lean.

javascript firefox chromium ublock-origin browser-extension blocker ublock

Updated Mar 16, 2026
JavaScript

FiloSottile / mkcert

Sponsor

A simple zero-config tool to make locally trusted development certificates with any names you'd like.

windows macos linux tls firefox ios chrome https certificates localhost local-development root-ca

Updated Aug 13, 2024
Go

zen-browser / desktop

Sponsor

Welcome to a calmer internet

firefox firefox-browser firefox-based zen-browser

Updated Mar 16, 2026
JavaScript

ArchiveBox / ArchiveBox

Sponsor

🗃 Open source self-hosted web archiving. Takes URLs/browser history/bookmarks/Pocket/Pinboard/etc., saves HTML, JS, PDFs, media, and more...

Updated Mar 16, 2026
Python

ovity / octotree

GitHub on steroids

github firefox chrome opera safari edge code-review browser-extension code-files pull-request-review

Updated Jun 6, 2024
JavaScript

gildas-lormeau / SingleFile

Web Extension for saving a faithful copy of a complete web page in a single HTML file

Updated Feb 24, 2026
JavaScript

xifangczy / cat-catch

猫抓浏览器资源嗅探扩展 / cat-catch Browser Resource Sniffing Extension

javascript chrome-extension jquery firefox chrome video-downloader firefox-extension m3u8-downloader

Updated Mar 2, 2026
JavaScript

microsoft / playwright-python

Python version of the Playwright testing and automation library.

firefox chromium webkit playwright

Updated Feb 11, 2026
Python

amir1376 / ab-download-manager

A Download Manager that speeds up your downloads

desktop-app kotlin windows linux firefox chrome downloader download desktop downloadmanager compose download-manager kotlin-multiplatform compose-desktop compose-multiplatform

Updated Feb 26, 2026
Kotlin

moonD4rk / HackBrowserData

Extract and decrypt browser data, supporting multiple data types, runnable on various operating systems (macOS, Windows, Linux).

windows macos golang firefox chrome browser hacking edge browser-extension pentest-tool

Updated Mar 16, 2026
Go

Anarios / return-youtube-dislike

Chrome extension to return youtube dislikes

chrome-extension firefox youtube firefox-addon firefox-extension dislike dislikes dislikes-count dislike-button

Updated Dec 12, 2025
JavaScript

MetaMask / metamask-extension

🌐 🔌 The MetaMask browser extension enables browsing Ethereum blockchain enabled websites

firefox chrome extension opera ethereum dapp edge brave dapp-developers

Updated Mar 17, 2026
TypeScript

crimx / ext-saladict

🥗 All-in-one professional pop-up dictionary and page translator which supports multiple search modes, page translations, new word notebook and PDF selection searching.

react chrome-extension firefox chrome typescript rxjs extension dictionaries firefox-addon webextension firefox-extension saladict

Updated Oct 8, 2025
TypeScript

ajayyy / SponsorBlock

Skip YouTube video sponsors (browser extension)

chrome-extension firefox chrome youtube opera chromium firefox-extension adblock web-extension youtube-videos adblocker hacktoberfest sponsored-segments sponsorblock

Updated Mar 5, 2026
TypeScript

mozilla-mobile / firefox-ios

Firefox for iOS

swift firefox browser mozilla ios-app

Updated Mar 16, 2026
Swift

browserless / browserless

Deploy headless browsers in Docker. Run on our cloud or bring your own. Free for non-commercial uses.

nodejs docker firefox chrome typescript websocket webkit puppeteer browserless playwright

Updated Mar 17, 2026
TypeScript

bitwarden / clients

Bitwarden client apps (web, browser extension, desktop, and cli).

electron nodejs javascript cli firefox chrome angular typescript desktop safari webextension browser-extension bitwarden

Updated Mar 17, 2026
TypeScript

arkenfox / user.js

Firefox privacy, security and anti-tracking: a comprehensive user.js template for configuration and hardening

firefox security settings privacy mozilla anti-fingerprinting anti-tracking arkenfox

Updated Mar 12, 2026
JavaScript