I just followed the instructions listed here:
https://www.cyberciti.biz/faq/howto-configure-wireless-bridge-access-point-in-pfsense/
and they work! After finishing those steps I can unplug my client’s Ethernet cable, connect over WiFi, and everything works as expected.
Until I reboot the pfsense firewall. And then nothing works. I can get a DHCP address via Ethernet or via WiFi, but I can’t get out to the internet. I can’t even get into the management interface of the pfsense router!
Nothing works until I go into the serial console and re-assign igb0 to WAN and igb1 to LAN, and then things start working again over Ethernet only.
I’m guessing this could be a firewall problem, but I’ve tried adding a TCPv4* pass any/any rule to the bridged LAN, the hardware LAN, and the WiFI interfaces, but I’m still left with zero connectivity.