It seems the default firewall rules filter out mDNS traffic.
All mDNS traffic is on the 169.254 subnet, yes?
No 224.0.0.251 port 5353 for mDNS, dns-sd via unicast should work fine with current rules.
Created attachment 104591 [details] allow mDNS traffic This patch works for me.
Commited - I'll hold off releasing until I have both smb and cups browsing issues sorted.
This is in.