Install Firefox OS On Nexus 5 – Highly Functional

Google Android is the best Mobile operating system if we look at its popularity and compatibility, followed by Apple iOS and Microsoft Windows OS, along with all that it is an open source platform, allowing users to do a lot of After market customizations without much problem, I still remember, trying Android on an iPhone 3Gs, the result was poor, only 3-hours of battery life with a lot of Compatibility bugs and lag was the only thing we experienced much in it, however, Dual booting an Android device is not a very difficult job and even if you change the Primary OS to any else, instead of Android as long as it is based on Linux, your device will work as a Charm.


Ubuntu OS was once released for Android devices to be installed as a secondary OS but it was faded out in lesser time, Firefox OS was also seen in the Past on LG Nexus 4 and as far as I remember, we posted its tutorial, however, it wasn’t as functional as it should be. But the release of Firefox OS for Nexus 5 is a hit and it is smooth fast and highly functional, however, you can’t install it the typical way, still if you are familiar with flashing the Stock Image via Fastboot commands, then this thing will be a piece of Cake for you, without further ado, let’s start.


The methods involved in flashing custom roms and rooting your phone is highly custom and may result in bricking your device,and has nothing to do with Google or the device manufacturers which is Google/LG in our case. In case of any mishap we may not be held responsible. Follow these instructions to the letter to avoid any mishap or bricking. Make sure that whatever you do, you are doing it at your own responsibility.


  • Downlaod The Firmware File: Link
  • First make sure that Android SDK is installed on PC: Link
  • LG USB Drivers: Link
  • Enable USB Debugging Mode.
  • Charge your Phone to At-least 75% battery.
  • Back-up your Important Data

Flash The FireFox OS:

Step-1. Download the Firmware File and Extract the Following Files:

  • Boot.img
  • System.img
  • Cache.img
  • Userdata.img

Step-2. Copy these files to Fastboot folder or Platform-tools folder.

Step-3. Now Open Command Prompt in the same folder, Hold Shift Key and Right Click anywhere in the Folder

Step-4. Turn Off your device and Press and Hold Power + Volume Down buttons until it Opens up in Bootloader mode

Step-5. Connect Your device With PC.

Step-6. Now In command Prompt, launch the commands one-by-one:

  • fastboot flash system system.img
  • fastboot flash userdata userdata.img
  • fastboot flash boot boot.img
  • fastboot flash cache cache.img

Step-7. Finally type the following:

  • fastboot reboot

Step-8. It will reboot your device, and once it boots up you’ll be running FireFox OS on your Nexus 5.



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