Hi Caleb,

Your request will be addressed as part of nav-speculation#319 
<https://github.com/WICG/nav-speculation/issues/319>.

Thank you,
Liviu
On Friday, May 17, 2024 at 4:51:53 PM UTC-4 Caleb Raitto wrote:

> I noticed the spec, 
> https://github.com/WICG/nav-speculation/blob/main/triggers.md#no-vary-search-hint
>  
> <https://wicg.github.io/nav-speculation/prerendering.html>, doesn't have 
> a privacy and security section -- could you add one? It looks like there's 
> lots of other good information about the privacy and security aspects of 
> this feature in questionnaires and explainers, but the explainer should 
> mention these too.
>
> Thanks, 
> -Caleb
>
> On Thursday, May 16, 2024 at 5:13:40 PM UTC-4 Liviu Tinta wrote:
>
>> Contact emailsdome...@chromium.org, jbro...@chromium.org, 
>> liviuti...@chromium.org
>>
>> Explainer
>> https://github.com/WICG/nav-speculation/blob/main/triggers.md#no-vary-search-hint
>>  
>> <https://wicg.github.io/nav-speculation/prerendering.html>
>>
>> Specificationhttps://wicg.github.io/nav-speculation/prerendering.html
>>
>> Summary
>>
>> Adds a hint to speculation rules that informs the navigation prerender 
>> cache that the URL to be prerendered expects to receive the same 
>> No-Vary-Search header in the response. The hint is useful because 
>> prerenders that depend on No-Vary-Search to match to navigations do not 
>> benefit the user if the navigation happens before prerender headers return 
>> from the server. Using the hint, the web browser will expect, but verify, 
>> that the No-Vary-Search hint matches with the No-Vary-Search header. If the 
>> No-Vary-Search hint does not match the No-Vary-Search header received then 
>> the web browser will send a new request. 
>>
>>
>> Blink componentInternals>Preload>Prerender 
>> <https://bugs.chromium.org/p/chromium/issues/list?q=component:Internals%3EPreload%3EPrerender>
>>
>> Motivation
>>
>> Adds a hint to speculation rules that informs the navigation prerender 
>> cache that the URL to be prerendered expects to receive the same 
>> No-Vary-Search header in the response. The hint is useful because 
>> prerenders that depend on No-Vary-Search to match to navigations do not 
>> benefit the user if the navigation happens before prerender headers return 
>> from the server. Using the hint, the web browser will expect, but verify, 
>> that the No-Vary-Search hint matches with the No-Vary-Search header. If the 
>> No-Vary-Search hint does not match the No-Vary-Search header received then 
>> the web browser will send a new request.
>>
>>
>> Initial public proposal
>> https://github.com/WICG/nav-speculation/blob/main/triggers.md#no-vary-search-hint
>>  
>> <https://wicg.github.io/nav-speculation/prerendering.html>
>>
>> TAG reviewNot applicable. The TAG has already given a negative opinion 
>> on the overall complexity of speculation rules (
>> https://github.com/w3ctag/design-reviews/issues/721), so we anticipate 
>> it would not be a good use of their time to review additions to the syntax. 
>> The addition itself is small and any architectural questions about it would 
>> be covered under the general closed speculation rules review.
>>
>> TAG review statusNot applicable.
>>
>> Risks
>>
>>
>> Interoperability and Compatibility
>>
>> None
>>
>>
>> *Gecko*: No signal
>>
>> *WebKit*: No signal
>>
>> *Web developers*: No signals
>>
>> *Other signals*: No-Vary-Search Hint for Prefetch Speculation Rules has 
>> been discussed, together with No-Vary-Search header at Web Perf WG 
>> meeting at TPAC 2023 
>> <https://docs.google.com/presentation/d/1GK92nCORW5vKd7LgGtTsgy35eqTV7P71l05pHsni8ok/edit#slide=id.g240fd6541f7_0_31>.
>>  
>> This feature implements the same No-Vary-Search Hint behaviour for 
>> prerender Speculation Rules.
>>
>> 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?
>>
>> None
>>
>>
>> Debuggability
>>
>> The No-Vary-Search hint is represented as a new json attribute 
>> ("expects_no_vary_search") in prerender Speculation Rules. The Speculation 
>> Rules can be viewed in DevTools on the Application tab under Speculative 
>> loads->Rules.
>>
>>
>> Is this feature fully tested by web-platform-tests 
>> <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>
>> ?Yes, Web Platform Tests will be added.
>>
>> Flag name on chrome://flagsNone
>>
>> Finch feature namePrerender2NoVarySearch - shared with No-Vary-Search 
>> support for Prerender 
>> <https://chromestatus.com/feature/5099218903760896?gate=6293413152686080>
>>  
>>
>> Non-finch justificationNone
>>
>> Requires code in //chrome?False
>>
>> Estimated milestones
>>
>> No milestones specified
>>
>>
>> Link to entry on the Chrome Platform Status
>> https://chromestatus.com/feature/5190922953555968?gate=5169870617706496
>>
>> This intent message was generated by Chrome Platform Status 
>> <https://chromestatus.com/>.
>>
>

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