They say openBSD 5.9 should work, so the next version of libertyBSD should be
the same.
Can I use BSD? #bsd
For the most part, BSD systems remain untested in libreboot. BSD systems
contain blobs, so do beware.
Anecdotal reports indicate that NetBSD should be compatible, as should
OpenBSD 5.9 or higher (libertyBSD might also work). It is unknown whether
other BSD distributions are compatible with libreboot at this time.
The BSD community in general is quite hostile towards the GNU project, and
being permissively licensed (they believe that companies should be able to
sell proprietary forks), it is less than ideal philosophically, from the
libreboot project's point of view.
Libreboot will not officially document how to install or boot BSD on a
libreboot system. You must consult with your BSD distribution provider, for
more information.
https://libreboot.org/faq/#bsd
