Contact [email protected]

Explainer
https://github.com/hemeryar/explainers/blob/main/coop_restrict_properties.md

Specificationhttps://github.com/whatwg/html/issues/6364

Summary

Cross-Origin-Opener-Policy is used to sever the relationship between popup
and openers, to increase security. "restrict-properties" is a proposed
value that restricts the relationship instead of completely severing it. It
would enable crossOriginIsolated when paired with COEP.


Blink componentBlink>SecurityFeature>COOP
<https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3ESecurityFeature%3ECOOP>

Search tagsCOOP <https://chromestatus.com/features#tags:COOP>,
restrict-properties
<https://chromestatus.com/features#tags:restrict-properties>


Risks


Interoperability and Compatibility

It could fail to become an interoperable part of the web platform if other
browsers do not implement it. The OT is intended to gather user feedback to
get support from Mozilla.


*Gecko*: No signal

*WebKit*: No signal

*Web developers*: No signals

*Other signals*: Have a few partners interested in trying this out like
Zoom and Facebook, as well as at least one internal partner (altimin@ for
perfetto dashboards).

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?



Goals for experimentation

The goal for this experiment is to give partners the possibility to try the
new value at scale and to discover potential deployment blockers that were
not anticipated (e.g. external dependency, same-origin communications
required, etc.)

Debuggability

COOP reporting will support restricted cross-origin properties reporting,
similar to what exists for other COOP values.

Will this feature be supported on all six Blink platforms (Windows, Mac,
Linux, Chrome OS, Android, and Android WebView)?Yes

COOP is parsed on all platforms, but the process model implied might vary.


Is this feature fully tested by web-platform-tests
<https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>
?Yes under
wpt/html/cross-origin-opener-policy/tentative/restrict-properties.

Flag name
--enable-features='CoopRestrictProperties'

Requires code in //chrome?False

Tracking bughttps://bugs.chromium.org/p/chromium/issues/detail?id=1221127

Launch bughttps://bugs.chromium.org/p/chromium/issues/detail?id=1347385

Estimated milestones
OriginTrial desktop last 110
OriginTrial desktop first 106
OriginTrial Android last 110
OriginTrial Android first 106


Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/5072630953017344

Links to previous Intent discussionsIntent to prototype:
https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAF07A2Uw-Oh0d7ktTPnV%3D8TTrr%2BNcTgfiLxzFd2P2QLD18qNsw%40mail.gmail.com
<https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAF07A2Uw-Oh0d7ktTPnV=8ttrr+nctgfilxzfd2p2qld18q...@mail.gmail.com>

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