Note: See this intent 
<https://groups.google.com/a/chromium.org/g/blink-dev/c/3Ga0Y2BEz7E/m/QRQyXY7UCQAJ>
 
for context on reintroducing the sufficiently-strict referrer policy 
requirement.

On Tuesday, January 10, 2023 at 3:20:43 p.m. UTC-5 Kevin McNee wrote:

> Contact emails
>
> mc...@chromium.org
>
> Explainer
>
>
> https://github.com/WICG/nav-speculation/blob/main/triggers.md#explicit-referrer-policy
>
> Specification
>
> https://wicg.github.io/nav-speculation/speculation-rules.html
>
> Summary
>
> This extends the speculation rules [1] syntax to allow developers to 
> specify the referrer policy to use with speculative requests triggered by 
> speculation rules.
>
> This also reintroduces the "sufficiently-strict referrer policy" 
> requirement [2].
>
> [1] https://chromestatus.com/feature/5740655424831488
>
> [2] 
> https://github.com/WICG/nav-speculation/blob/main/fetch.md#stripping-referrer-information
>
>
> Blink component
>
> Internals>Preload 
> <https://bugs.chromium.org/p/chromium/issues/list?q=component:Internals%3EPreload>
>
> TAG review
>
> https://github.com/w3ctag/design-reviews/issues/721
>
> TAG review status
>
> Pending
>
> Risks
>
> Interoperability and Compatibility
>
> Gecko: No signal (
> https://github.com/mozilla/standards-positions/issues/620)
>
> WebKit: No signal (https://github.com/WebKit/standards-positions/issues/54
> )
>
> Web developers: Positive We have a partner that requires this capability 
> to adopt cross-site prefetch, and another that requires this for 
> same-origin prerendering.
>
> Other signals:
>
> WebView application risks
>
> Does this intent deprecate or change behavior of existing APIs, such that 
> it has potentially high risk for Android WebView-based applications?
>
> No. Enforcing the referrer policy requirement would not cause user-visible 
> breakage, since preloading is a performance-enhancement feature that isn't 
> guaranteed to trigger anyway.
>
>
> Debuggability
>
> In the DevTools Network tab, the speculative request can be selected to 
> see referrer information.
>
>
> Will this feature be supported on all six Blink platforms (Windows, Mac, 
> Linux, Chrome OS, Android, and Android WebView)?
>
> Yes
>
> Is this feature fully tested by web-platform-tests 
> <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>
> ?
>
> Yes
>
> Flag name
>
> SpeculationRulesReferrerPolicyKey (Runtime Enabled Feature)
>
> Requires code in //chrome?
>
> False
>
> Tracking bug
>
> https://bugs.chromium.org/p/chromium/issues/detail?id=1355146
>
> Estimated milestones
>
> We would like to ship this in M111.
>
>
> Anticipated spec changes
>
> Open questions about a feature may be a source of future web compat or 
> interop issues. Please list open issues (e.g. links to known github issues 
> in the project for the feature specification) whose resolution may 
> introduce web compat/interop risk (e.g., changing to naming or structure of 
> the API in a non-backward-compatible way).
>
> None anticipated.
>
> Link to entry on the Chrome Platform Status
>
> https://chromestatus.com/feature/4694585584910336
>
> Links to previous Intent discussions
>
> Intent to prototype: 
> https://groups.google.com/a/chromium.org/g/blink-dev/c/qzElfWpzWXg/m/yC8gOtcBAwAJ
>
>
> This intent message was generated by Chrome Platform Status 
> <https://chromestatus.com/>.
>
>

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