Does anyone know how I can have it so that whenever I turn on my Fire TV it automatically load the Channels app? The Amazon home screen can be confusing and I want to make it as easy as possible.
An AppleTV will power on directly to the app that was open when things were powered down. I'm not sure if FireTV does something similar, but that is a lower-end device and might not have that option.
There are many APK's out there that you can sideload like Autostart/Launcher on boot ... google is your friend.