Abstract: Firefox is the emerging mobile operating system from Mozilla Gecko Technology. It creates the new revolution for the handheld device product development. Open source operating system has great support to platform integrator and power full to the mobile Application developer. This paper highlights the Layers of the Firefox operating system with details of layered architecture system. In general this explains about the How Android BSP is coupled with Firefox Layers. It briefs about the Firefox specific changes on the Android BSP. Detailed explanation on the NFC components, NFC data structures, NDEF messages structure and NFC daemon in Firefox system. This paper elucidate the requirement of Firefox operating system and constraint on Hardware and software. Currently, Firefox Application runs in various target systems like, simulator, Emulator, Desktop System, Mobile Phones, Hardware Development platform, and Dual boot support with Android OS.