What does "doing some things" mean? Plainly using FF oder changing settings? If so which ones?

Are you rather looking for nohup?

@StephenKitt This seems like a very local setting - on my debian system (PC not server), I've never had any automatic updates, nor on my raspbian machines. And at least I would not remember deactivating such setting during installation.

Release v6.0.0 confirmed to work wit debian 12 on 6.1.106-3 kernel. Manually installed package evdi-dkms from repositories.

@Russ That is a topic (and question) of its own. Have a read of man bash -> SHELL BUILTIN COMMANDS -> trap. In general you define a command to be executed once the shell receives an exit call or a certain signal. trap <command(s)> SIGNAL(S). Usually, you define your EXIT (better as function called e.g. cleanup) in the beginning, then go trap cleanup EXIT. Note that EXIT defines the closure conditions here, hence better avoid that name for your alias in the first place.

I feel like your EXIT command better be handled using a trap.

Just mentioning pmount as another alternative for mouting without root access.

Do you have the hardware available? A repeater will need one antenna for receiving, the other for sending. A RPI zero 2 has only one 2,4 GHz module on board.

If your process is operated as a service, the logfile might be mentioned in a config file. But best seems to be looking at the fle itself ....

Depending on your use case, office utilities like libreoffice allow protecting files and would do so again once editing is done.