ReferrerPolicy: "no-referrer" | "no-referrer-when-downgrade" | "origin" | "origin-when-cross-origin" | "same-origin" | "strict-origin" | "strict-origin-when-cross-origin" | "unsafe-url"

Referrer policy for the iframe.

User documentation for the policies can be found here: https://developer.mozilla.org/en-US/docs/Web/API/HTMLIFrameElement/referrerPolicy