Can you clarify the planned timeline for the experiment? Is my 
understanding correct that the idea is to roll this out via finch, rather 
than asking people to opt-in to an Origin Trial?

-- Dan

On Thursday, June 18, 2026 at 6:27:57 AM UTC-7 Chromestatus wrote:

> *Contact emails*
> [email protected], [email protected]
>
> *Explainer*
> https://github.com/explainers-by-googlers/static-storage-quota
>
> *Specification*
> *No information provided* 
>
> *Summary*
> Fixes a bug in the predictable-storage-quota that allows Incognito mode to 
> be detected. A change introduced recently to Stable, buckets the result of 
> the StorageManager's estimate API for sites that do not have unlimited 
> storage permission to max(10Gib, ceil(actual_quota_in_Gib)) + usage. 
> However, in incognito mode, the actual quota value is based on a fraction 
> of available RAM, instead of the disk space - providing an Incognito 
> detection surface. This change fixes the value of this API for Incognito 
> Mode to the maximal bucket of: usage + 10Gib. Discussion on the original 
> feature available here: 
> https://groups.google.com/a/chromium.org/g/blink-dev/c/7q0YGQNVkjs/m/mpYkQVWpAQAJ
>  
> This is a new Chromestatus in place of an original PSA, as this launch 
> should start with an I2E to ensure the breakage risk is properly addressed. 
> See 
> https://groups.google.com/a/chromium.org/g/blink-dev/c/00aHBCiUGzo/m/B0Dq06SFAQAJ.
>  
>
>
> *Blink component*
> Blink>Storage>Quota 
> <https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3EStorage%3EQuota%22>
>
> *Web Feature ID*
> storage-manager <https://webstatus.dev/features/storage-manager> 
>
> *Search tags*
> incognito <http:///features#tags:incognito>, quota 
> <http:///features#tags:quota>, storage <http:///features#tags:storage>
>
> *TAG review*
> *No information provided* 
>
> *TAG review status*
> Pending
>
> *Goals for experimentation*
> None 
>
> *Risks*
>
>
> *Interoperability and Compatibility*
> *No information provided* 
>
> *Gecko*: No signal
>
> *WebKit*: No signal
>
> *Web developers*: No signals
>
> *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 information provided* 
>
>
> *Ongoing technical constraints*
> *No information provided*
>
> *Debuggability*
> *No information provided* 
>
> *Will this feature be supported on all six Blink platforms (Windows, Mac, 
> Linux, ChromeOS, Android, and Android WebView)?*
> No
>
> *Is this feature fully tested by web-platform-tests 
> <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>?*
> No 
>
>
> *Flag name on about://flags*
> *No information provided* 
>
> *Finch feature name*
> kIncognitoStaticStorageQuota 
>
> *Requires code in //chrome?*
> False
>
> *Tracking bug*
> https://issues.chromium.org/issues/464484739
>
> *Estimated milestones*
>
> No milestones specified
>
>
> *Link to entry on the Chrome Platform Status*
> https://chromestatus.com/feature/5117411264167936?gate=5943068999155712
>
> This intent message was generated by Chrome Platform Status 
> <https://chromestatus.com>. 
>

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