Last Update or Jail/Warden Bug
I can not login into Cinnamon or Gnome anymore. If I switch to console I get permissions conflicts (my user's home dir is not accessible/writable to/for gnome-session and dconf does not work properly).
System does not crash, I'm able to reboot it or manually kill related processes and relogin.
I suppose that some gtk related problems with Firefox are due to same permissions mess.
I did not change any permission settings manually.
I can not determine what caused it. In that time last update get installed + I created ports jail using Warden to be able to run X appliactions (browsers). I even installed Firefox and Chrome via pkg inside jail when on my system coexisted both installed from PBIs via AppCafe.
I'll create new ticket for that.