@thoralf
Wüst you should do is creating a second home assistant dev environment on your computer.
Doesn't matter if VM or Docker.
On VM you can make a snapshot.
Then backup your regular HA and import it on your dev.
In the dev HA you can check the update. If it does not work reset the snapshot.
If it works, do your update on the main HA.
As I didn't need it, unchecked, but maybe two HA could be installed on a raspi, 1 for live one for staging.
@CaffeinatedCubits
That is why I was asking for functional solution.
I currently use ferdium which uses electron and so chrome. This not only holds the risk of sending data to google but also consumes a load of RAM, more than the same amount of Firefox tabs.