Glossary term
What is frame-ancestors (CSP frame-ancestors)?
frame-ancestors stands for CSP frame-ancestors.
A CSP setting that lists which sites may put your page inside a frame. 'none' means nobody.
Learn it properly · Security for DevelopersLesson 2: XSS, CSRF, Clickjacking and Security HeadersHow a script gets into your page and how to stop it with output encoding and CSP, how CSRF uses your cookies, SameSite and CSRF tokens, frame-ancestors, and the headers worth setting.