Referrer with referrer policy no-referrer: null
Referrer with referrer policy empty: null
Referrer with referrer policy origin: http://localhost/
Referrer with referrer policy strict-origin: http://localhost/
Referrer with referrer policy unsafe-url: http://localhost/echo/referrer-policy-meta-tag/iframe
Referrer with referrer policy always: http://localhost/echo/referrer-policy-meta-tag/iframe