Can a Librem 13 boot from a USB drive?

Can the Librem laptops boot from a USB drive to use a live OS occasionally, such as Ubuntu or Tails? If so, does that require a specific BIOS?

Yes.

What do you mean by that?

Yes, plug the USB drive in, turn the librem on, hit the escape key. Then you get a boot menu, select your USB device, done.

To be able to boot from a live USB drive, does it matter whether the Librem 13 has coreboot or has Pureboot with Librem Key?

No it does not, both can boot from USB.

excellent, thanks, I greatly appreciate it.