Self signed. Don't remember why (but there is a reason). Not sure why he doesn't just use Lets Encrypt.
When I try to add that CA to Firefox, it shows the SHA256 fingerprint as AA:DD:6D:06:88:7B:36:60:67:56:00:AB:D0:76:FB:B4:3C:60:10:14:5D:AB:4D:39:06:F8:24:08:4B:14:D2:BE
So I should not trust that CA certificate?