Intent to Ship: Referrer-Policy header
Emily Stark
Contact emails
est...@chromium.org, joc...@chromium.org
Spec
https://w3c.github.io/webappsec-referrer-policy/
TAG review for Referrer Policy appears to have been done in https://github.com/w3ctag/spec-reviews/issues/36 though it did not include the Referrer-Policy header specifically.
Summary
The Referrer-Policy header allows pages to set a referrer policy by sending an HTTP response header.
Link to “Intent to Implement” blink-dev discussion
https://groups.google.com/a/chromium.org/d/msg/blink-dev/Umj9iVRJM70/6CG49IswBwAJ
Is this feature supported on all six Blink platforms (Windows, Mac, Linux, Chrome OS, Android, and Android WebView)?
Yes.
Interoperability and Compatibility Risk
Firefox 50 is shipping the Referrer-Policy header (https://developer.mozilla.org/en-US/Firefox/Releases/50), though there are no public signals from Edge or Safari.
web-platform-tests contains extensive tests for the Referrer-Policy header.
In the Intent to Implement thread, there was a mention that we should take extra care with this feature since there would be privacy implications to removing it. While there are still no public signals from Edge or Safari, I still think we should ship it because 1.) Firefox is shipping it, and 2.) the rest of the Referrer Policy spec is shipped despite carrying the same risk.
OWP launch tracking bug
Entry on the feature dashboard
https://www.chromestatus.com/features/5639972996513792
Chris Harrelson
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Jochen Eisinger
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