If you get a firewall with a ZTP SKU, they are the same as standard NGFWs but boot up in a different way. If for any reason you want the ZTP to function like a normal box, run the following command.

 set system ztp disable

The old command used to be:

request disable-ztp

Then continue to setup/register in the usual way.

You can also run a status check

show system ztp status