Thunderbird for Android – Open Source Email App for Android (fka K-9 Mail)

Firefox for iOS

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

Firefox user.js for speed, privacy, and security. Turn off AI. Your favorite browser, but better.

All of source code of version 10 or later of Floorp Browser, the most Advanced and Fastest Firefox derivative 🦊

⚠️ Fenix (Firefox for Android) moved to a new repository. It is now developed and maintained as part of: https://github.com/mozilla-mobile/firefox-android

The faster and smarter Debugger for Firefox DevTools 🔥🦊🛠

user.js -- Firefox configuration hardening

Firefox Decrypt is a tool to extract passwords from Mozilla (Firefox™, Waterfox™, Thunderbird®, SeaMonkey®) profiles

Komodo Edit is a fast and free multi-language code editor. Written in JS, Python, C++ and based on the Mozilla platform.

⚠️ Firefox Focus (Android) moved to a new repository. It is now developed and maintained as part of: https://github.com/mozilla-mobile/firefox-android

Neqo, the Mozilla Firefox implementation of QUIC in Rust

⚠️ This project moved to a new repository. It is now developed and maintained at: https://github.com/mozilla-mobile/firefox-android

Librefox: Firefox with privacy enhancements

Mozilla's Localization Platform

Making mozilla.org awesome, one pebble at a time

⚠️ Firefox Focus (iOS) has moved to a new repository. It is now developed and maintained as part of: https://github.com/mozilla-mobile/firefox-ios

nidium is an ongoing effort for a mobile hw-accelerated rendering engine to create apps and games. Embedding Mozilla JavaScript VM, Google Skia, Facebook Yoga. https://twitter.com/nidiumproject for updates

The DownThemAll! WebExtension

Winner of Mozilla's $50,000 prize for AI