Deprecated X-Frame-Options, use instead CSP "frame-ancestors"
Deprecated X-Frame-Options, use instead CSP "frame-ancestors"

"X-" construction is deprecated https://www.ietf.org/rfc/rfc7034.txt in
favour of the frame-ancestors
https://www.owasp.org/index.php/Clickjacking_Defense_Cheat_Sheet

Related
https://github.com/securityheaders/securityheaders-bugs/issues/54

laukstein/ajax-seo,laukstein/ajax-seo