I have tried to show my site in a facebook tab using JFBConnect component.
But the tab shows nothing .
and after contacting the component support team , they sent me this message:
Refused to display 'https://YOURSITE.com/' in a frame because it set 'X-Frame-Options' to 'SAMEORIGIN, SAMEORIGIN'.
You'll need to remove that X-Frame-Options header from the response.
How to disable X-frame-option , cause I didn't find such an option in admintools . or maybe its a server firewall !!