This document describes a proposal the "referrer" metadata name. Using the referrer metadata attribute, a document can control the behavior if the Referer HTTP header attached to requests that originate from the document.
The referrer metadata attribute can have one of four values:
Let referrer-policy be the value of the
content attribute with
LWS stripped from the beginning and end of the string and converted to lower case. If referrer-policy is none of the strings listed above, the user agent MUST act as if referrer-policy is the string
If the directive is a string other than
default, then Step 3 of Fetching resources in the HTML standard [HTML] is altered as follows:
This meta element instructs the user agent to omit the
Referer header in all HTTP requests that originate from the document containing the element:
<meta name="referrer" content="never">
This meta element instructs the user agent to include the document's origin in the
Referer header rather than the full URL of the document.
<meta name="referrer" content="origin">