Rooted Fire TV owners will be happy to hear that a pre-rooted version of Fire TV software version 18.104.22.168 has just been released by rbox. You can download it from the ROM page and, while you wait for the download to complete, shoot rbox a few bucks to show your appreciation for his continued support of the Fire TV. Without him, you’d probably be running 22.214.171.124 still. For those wondering about a pre-rooted Fire OS 5, I’ve passed the stock ROM over to rbox to examine, but don’t get your hopes up just yet. Fire OS 5 likely uses an incompatible bootloader, so it won’t be trivial to make it work with rooted Fire TVs.
If you’re new to Fire TV rooting, check out my starters guide to learn how to root your Fire TV and how to install the latest pre-rooted ROM. As always, this pre-rooted ROM will not help you root a Fire TV, since your Fire TV must already be rooted to install it. The purpose of this pre-rooted ROM is to update rooted Fire TVs to the latest software version without losing root.