TheyCallMeHacked

This has some "yes do as I say" vibes

Yeah this has me lost too

I don't know what's stupid to say about Gesellschaft für Software und Systementwicklung mit beschränkter Haftung

Hmm, I'm not sure... I must admit, I only use SeaBIOS, not GRUB, so I wouldn't know how to configure it

Yeah, that's basically right. I believe flashprog is also included in libreboot, have a look in the elf/ directory. After that, it should work as expected

Oh you can still do that. The path changed to elf/cbfstool/[TREE]/cbfstool (replace [TREE] with the tree concerened). Note that since the switch to the libre RAM init code, mrc.bin is not included anymore

I'm not sure what you mean by "checking the ROM"...

They've been pretty tame lately, but there have been issues historically that made a lot of people (rightfully) mad. You ca read on them here: https://manjarno.pages.dev/

I don't know what the problem is. I'm trying to rule things out one after the other.

Maybe try using systemd-boot instead of GRUB?

There are a few ways to investigate, but for that we would need a bit more info. Firstly, what distro do you use ? Try using a different bootloader than GRUB to see if it solves the issue. Otherwise you could also try to use Linux's UEFI stub.

I don't know about beer, but there are people making lactomel (aka mead with milk in the must). I guess maybe the process is similar here

You'll have to wait for FreeBSD 66.6, which may happen in a few decades