.LAN is not an official top level domain. So I assume this is either your home network or work network? In any case your problem has nothing to do with the .LAN doman.

Maybe you have “https everywhere” activated. If so, Firefox will always default to https unless you specify http in the URL. Again, unrelated to .LAN.

For the certificate: what do you mean “when available”? A self signed cert is a self signed cert. There is no “available” or not. You can import the certificate into the Firefox trust store so Firefox will trust that one specific cert but any other self signed cert will cause an error. That is expected and save behaviour (and unrelated to .LAN).

No, why would it? It will run code in the context of the current user which is absolutely enough to start a new process that will run in the background, download more code from a attacker server and allow remote access. The attacker will only have as much permissions as the user executing the code but that is enough to steal their files, run a keyloggers, steal their sessions for other websites etc.

They can try to escalate to the admin user, but when targeting private victims, all the data that is worth stealing is available to the user and does not require admin privs.

Since no arena is specified I assume it to be the only logical place.

In space! (the winner is brought back to their natural habitat)

Everything else would be unfair to at least one of the parties.

I think the ants would outlast all the animals and insects. They might freeze solid and (some) might survive the unfreezing after the figh. Or they could form a giant ball where the ones in the middle survive. And who cares if 19kg die.

On the other hand, the oak would probalby last weeks and could sprout new leaves and roots again if given proper treatment back on earth.

So … GO TREE!

But what does that mean? Does Australia span all timezones? Take its zone of UTC+9:30 and then go all the way around the globe to the east until you hit UTC+8 which is also Australia. Congrats you passed through all timezones and are in Australia again.