To minimize system crashes and if you use ZFS as filesystem, create a new BootEnvironment and boot into it before changing system files. If a change fails and the system stops booting, just roll back to the elder, good BE and activate it again and your system is up and running again and you can start testing in a new be again - within minutes.
Just an idea and my fifty cents.

Thanks aschiebe, good advice if I knew a whole lot more.
I was using UFS, and have no idea about BootEnvironment - that would be a learning curve in itself.
Shall revisit this on the testing laptop when I get a chance. Working 50+ hours per week at the Food Bank.

aschiebe wrote: ↑Sat May 16, 2020 4:18 pm To minimize system crashes and if you use ZFS as filesystem, create a new BootEnvironment and boot into it before changing system files.

This is interesting, but forgive you can give some link, description, I'm new to BSD and many things are new to me.

On the current laptop I have intel wifi-card and everything is OK, but I have a second laptop and there I also have a BCM wifi-card and I would like to avoid problems with starting the system.

Thanks.

I think this article is a good start to learn about BE and zfs, precondi is that you have installed ghostsbd with zfs filesystem,
https://mwl.io/archives/2363
happy be and zfs

Many thanks have explained the problem a bit with be and zfs.

https://forums.freebsd.org/threads/bcm4 ... ing.68103/ READ This for compiling custom "buildkernel" details. Worked for FreeBSD 11.2 , 12.x, 13 might have Broadcom BCM43224 device available to use?
https://forums.freebsd.org/threads/ld-e ... 466.89883/

There are several firmware files for Broadcom Wireless devices, select the proper version firmware for your BCM Wifi device.
Commands to issue to see what Vendor and Product ideas are for your Wifi Device