The CSP frame-ancestors directive controls which parent pages may embed a page in an iframe. Setting it to 'none' is similar to X-Frame-Options: deny.
Checked 2026-09-30
The HTTP Content-Security-Policy (CSP) frame-ancestors directive specifies valid parents that may embed a page using <frame>, <iframe>, <object>, or <embed>.
- Vendor
- not restricted
- Product
- Web browsers
- Subsystem
- Content Security Policy
- Deployment
- n-a
- Region
- not restricted
- Release range
- current as of 2026-09-30
- Checked
- 2026-09-30
Sources
- CSP: frame-ancestors — MDN Web Docs (Mozilla) · tier 5 independent technical research · frame-ancestors: introduction
Cite this note
APA
WarmTransfer. (2026, September 30). Building a custom Webex Contact Center Agent Desktop widget: source note wxcc-desktop-widget-setup-mdn-frame-ancestors. WarmTransfer. https://warmtransfer.net/knowledge/claims/wxcc-desktop-widget-setup-mdn-frame-ancestors
BibTeX
@misc{warmtransfer-claim-wxcc-desktop-widget-setup-mdn-frame-ancestors,
title = {Building a custom Webex Contact Center Agent Desktop widget: source note wxcc-desktop-widget-setup-mdn-frame-ancestors},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/wxcc-desktop-widget-setup-mdn-frame-ancestors},
note = {Source note wxcc-desktop-widget-setup-mdn-frame-ancestors, checked 2026-09-30}
}