This will delete all internal user data (such as installed apps). You still need a virtual machine to flash Firefox OS. (This has been tested on OS X 10.9) Sorry, but Mac users are currently unable to flash the bootloader from a virtual machine.

Just follow the bricked device instructions. Mac OS X users, you can flash the bootloader using LiveSuite for Mac. Linux users then you can update the bootloader on Windows (or Mac) as described below and then follow these these instructions to flash Firefox OS. See the special instructions at the bottom of this page to accomplish this. Note: This method is Windows only but works from Windows inside a virtual machine such as VirtualBox on Linux. This bootloader update fixes the problem of not being able to flash a working OS should your tablet become completely disabled by allowing you to enter fastboot mode using the tablet buttons. You only need update the bootloader once as subsequent flashing and resets will not affect it. Flashing the bootloader is not strictly necessary in order to flash Firefox OS but it does offer advantages.

We recommend you that you flash your Flatfish device with this bootloader update (version 2.0) if you have not already done so.

Firefox os x xps document viewer plugin