Firefox OS for phones is dead

Mozilla gives up on Firefox OS, its mobile-turned IoT operating system

The All-new Home on Firefox for Android Beta – Firefox UX

Firefox OS for smartphones, incredible platform for Developers

Firefox OS is back on KaiOS

Firefox OS - Wikipedia

Mozilla Confirms Exit from Smartphone Business, but Firefox OS Isn't Dead

Firefox OS For Smartphones Officially 'Dead' – Uberphones

Android alternatives that tried and failed over the last decade

This Android and iOS Rival Just Received Its Death Schedule