[whatwg] <meta name="referrer">

[Michal Zalewski]

> It would be nice if this could be done orthogonally to rel="noreferrer", and
> in a way that's link-specific instead of global to the whole page; for
> example, <a rel="originreferrer">, <a rel="alwaysreferrer">.

There is a fairly strong security benefit of policing it on document-
or even origin-level: it's exceedingly easy to miss an outgoing link
or a Referer-sending subresource (including <img>, <iframe>, <link
rel=...>) otherwise.

It's roughly the same reason why we have CSP, even though policing the
markup is theoretically possible without it.

/mz