Feature-Policy: publickey-credentials-get - HTTP
the http feature-policy header publickey-credentials-get directive controls whether the current document is allowed to access web authentcation api to create new public-key credentials, i.e, via navigator.credentials.get({publickey: ..., ...}).
... the http feature-policy header publickey-credentials-get directive controls whether the current document is allowed to access web authentcation api to create new public-key credentials, i.e, via navigator.credentials.get({publickey: ..., ...}).
...is not allowed in cross-origin documents in nested browsing contexts.

HTTP Index - HTTP
ed, the paymentrequest() constructor will throw a securityerror.
... 141 feature-policy: picture-in-picture directive, feature-policy, http, picture in picture, reference the http feature-policy header picture-in-picture directive controls whether the current document is allowed to play a video in a picture-in-picture mode via the corresponding api.

Feature-Policy - HTTP
rent document is allowed to download and display large images.