As a related aside, I have a Fire Cube device on one of my TVs along with Jellyfin. I've been ripping all of my Blurays and DVDs to a local NAS with the objective of having my content available even if my internet connection is down. I discovered, the hard way, that the Fire TV won't function AT ALL without an active internet connection. It just says it cannot load the home page with no option to open any installed applications. Other STBs in my home worked just fine during the outage. If I can't find a way to make it run Jellyfin during an outage, it's going in the bin.
Hey I hope you see this: you can use your fire cube offline, the thing that doesn’t work is the home screen. But if you hold down the home button, you can get to the app quick launcher (first or second selection, depending if you use profiles) and launch the app directly
I get around this with my custom setup but the hold down home / quick launch is available on all fire tv devices since the beginning.
