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Permissions Policy — an HTTP and iframe policy that enables, disables, or delegates selected browser features for a document and its embedded content.
A browser applies the policy only after receiving a valid HTTP header or cookie attribute. Security headers complement secure code and do not remove a server-side vulnerability; an overly restrictive policy can break legitimate site behavior.
Permissions Policy — an HTTP and iframe policy that enables, disables, or delegates selected browser features for a document and its embedded content.
The policy restricts a specific browser behavior, such as resource loading, page embedding, referrer disclosure, feature access, or cross-site cookie transmission.
Introduce the policy gradually, validate syntax and actual response headers, test critical user flows, and review browser-console messages or violation reports.
