Can I leave all my drives connected, plug in a seperate SSD through USB, boot into Nobara live and install on that drive without it affecting my mint install?

Yes. Just double-check every part of the install process so you don’t write to the wrong device.

Also, if I do that will it put the EFI file on the seperate SSD?

Probably yes (depends on the options you pick during the install process). The external drive will get its own boot partition with appropriate EFI files. Then to boot from it, you would select the external drive in your UEFI.

I use rEFInd as my EFI bootloader: It lets me chain load other boot options (external drives) without touching my motherboard UEFI settings. I leave it installed to my main boot partition, but it scans for other bootable partitions at startup. Then it auto-populates a selector list of my main install, or whatever other external devices are plugged in. It can chain load GRUB, other EFI bootloaders, Windows, etc from these devices, so you don’t have to worry about compatibility with whatever bootloader the OS expects to use.

You said you don’t want the page to load. Do you even care if the browser opens?

What about overriding the default browser application that the terminal tries to use? Maybe there’s some env variable to override the xdg browser default, and you could point it to a script that exits instantly.

I like that the response from Amazon was very obviously AI-written

Sorry, what’s .Net again?

The runtime? You mean .Net, or .Net Core, or .Net Framework? Oh, you mean a web framework in .Net. Was that Asp.Net or AspNetcore?

Remind me why we let the “Can’t call it Windows 9” company design our enterprise language?