Ultimape: good to see you here on a random blog!
This is especially problematic for device manufacturers that produce gear for isolated networks. I like plex’s solution but it won’t work for the devices my company makes. Our customer’s (e.g. CNN, NBC, ABC, etc) entire facility is typically air-gapped from the internet and yet users need to connect to the devices using browsers.
There don’t seem to be any good solutions except possibly using self-certs & just telling users to click through the scary warnings… if that is even going to be possible in the future. Either that or reverting to fat clients and custom solutions.