It actually takes a few trillion years but its fine because we just stop considering the “failed” universes because they will be gone soon™ anyway.

“Evolutionary reason” does not necessarily mean that a feature is an advantage. Mutations are random and then positive or negative selective pressure act on them untill the mutation is either extinct or is adopted by the whole population. For features without selective pressure the same thing still happens it just takes longer and is basically random. So different populations of a species will always develop different features even when given the same environment.

So for most of the features you listed: yeah it just happened.

Then OP has to die in international waters. And I think ships usually count as part of the country they are registered in. So if you die on a cruise ship it still counts like dieing in that ships owner country. And its not trivial to move a corpse out of a country, there are laws about that. So the country they plan to die in very mutch matters.

.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).