Permissions-Policy
An HTTP response header that switches browser features, such as the camera, microphone, location or payment, on or off for a page and anything it frames. CrawlCheck sends one on its own pages that turns off the features it never uses.
What Permissions-Policy does not show
It restricts what scripts on the page may ask the browser for; it does not stop a script from running or from sending data it already has.
Related terms in Security and privacy
Where an agent, a tool or a page can be turned against its operator, and the controls that limit the damage without proving safety.
X-Frame-Options · frame-ancestors · Referrer-Policy · Encrypted Client Hello · lookalike domain · homoglyph · incident switch · high-risk field · Indirect prompt injection · Direct prompt injection · Jailbreak · Data exfiltration · Sensitive information disclosure · Secret leakage · Insecure output handling · Excessive agency · Least privilege · Trust boundary · Input validation · Output validation · Allowlist · Denylist · SSRF · RCE · Credential scope · OAuth scope · API key · Bearer token · mTLS · Rate-limit policy · Audit log · PII · Data minimization · Purpose limitation · Retention period · Data residency · Tenant isolation · Threat model · DMARC · DMARC alignment · SPF · DKIM · MTA-STS · TLS-RPT · CAA record · DNSSEC · hard bounce
Questions about Permissions-Policy
What is Permissions-Policy?
An HTTP response header that switches browser features, such as the camera, microphone, location or payment, on or off for a page and anything it frames. CrawlCheck sends one on its own pages that turns off the features it never uses.
What does Permissions-Policy not show or guarantee?
CrawlCheck sends one on its own pages that turns off the features it never uses. It restricts what scripts on the page may ask the browser for; it does not stop a script from running or from sending data it already has.
Which area of the glossary does Permissions-Policy belong to?
Security and privacy: Where an agent, a tool or a page can be turned against its operator, and the controls that limit the damage without proving safety.
← Referrer-Policy · Encrypted Client Hello →
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