When my app tries to use facebook login, the process gets blocked by :
Blocked a frame with origin "http://<server.ip>" from accessing a frame
with origin "http://<my.domain>". Protocols, domains, and ports must match.
Related questions don't really help as they are related to frames from facebook? Both ip and domain are listed as valid redirect URI in facebook.
It seems to stop the facebook popup to close.
After further testing it seems that in fact the handshake actually works, but that the popup doesn't close. I'm going to ask another question with those infos.