Intent to Experiment: IncognitoStaticStorageQuota

[Chromestatus]

Contact emails

michalh...@google.com, b...@google.com

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

Web Feature ID

storage-manager

Search tags

incognito, quota, 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?

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.