GNU IceCat is a free and open-source web browser from the GNU Project. It is a fork of Mozilla Firefox, modified to ensure it contains 100% free software and to enhance user privacy.
Iceweasel was not a separate web browser; it was simply a renamed version of Mozilla Firefox.
CometBird was a short-lived, niche web browser that was essentially a lightly modified version of Mozilla Firefox
ReactOS
LibreWolf is a privacy-focused, open-source web browser designed to be a secure and private version of Firefox.
TenFourFox was a specialized web browser designed to run on older, PowerPC-based Apple Macintosh computers
Swiftfox was a optimized version of Mozilla Firefox specifically for Linux, designed for one purpose: raw speed.
FireDragon is a performance-optimized, privacy-hardened web browser for Linux, specifically designed for the Garuda Linux distribution.
Firefox Focus is a streamlined, privacy-focused mobile browser designed for automatic, single-session browsing
nduinOS is a cloud-native, container-based operating system designed from the ground up for a connected world. Its history is a story of a bold vision finding a practical home.
List of Operating Systems
Redox OS is an ongoing, ambitious project that serves as a proof-of-concept for building a modern, memory-safe operating system from the ground up