Document Policy
A mechanism that allows developers to set certain rules and policies for a given site. The rules can change default browser behaviour, block certain features or set limits on resource usage. Document Policy is useful both for security and performance, and is similar to [Permissions Policy](/permissions-policy).
Feature Policy
This specification defines a mechanism that allows developers to selectively enable and disable use of various browser features and APIs. Feature Policy is deprecated and has been replaced with [Permissions Policy](/permissions-policy) and [Document Policy](/document-policy).
Permissions Policy
A security mechanism that allows developers to explicitly enable or disable various powerful browser features for a given site. Similar to [Document Policy](/document-policy).
document api: featurepolicy
document api: requeststorageaccess: third-party cookies sent only with requests to the calling embed's exact origin, not the whole site.
document api: `securitypolicyviolation` event
securitypolicyviolationevent api: documenturi
headers http header: document-isolation-policy
headers http header: feature-policy: document-domain
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