Bug 230550 – Implement COEP:credentialless

• Status: NEW
• Component: Page Loading

[Arthur Sonzogni]

New feature request.

Filling implementation bug, in order to land spec PR:
- https://github.com/whatwg/html/pull/6638
- https://github.com/whatwg/fetch/pull/1229

Explainer:
- https://github.com/WICG/credentiallessness

Request for position:
- Chrome: https://groups.google.com/a/chromium.org/g/blink-dev/c/Zr9n9_LG7s4/m/4y-b481hBAAJ
- Wekit: https://lists.webkit.org/pipermail/webkit-dev/2021-June/031898.html
- Firefox: https://github.com/mozilla/standards-positions/issues/539

[Chris Dumez]

This adds a lot of complexity and seems to have quite a few pre-requisites (Private Network Access, ORB, anonymous iframes).

I am not convinced it is worth the effort at the moment.

[Arthur Sonzogni]

Yes, that's totally understandable ;-)

Note that anonymous iframe is not a prerequisite.

[Radar WebKit Bug Importer]

<rdar://problem/83355925>

[Sanjay Kumar]

From Firefox commit it does not seem like that much work. 
https://bugzilla.mozilla.org/show_bug.cgi?id=1731778

Neither Firefox nor Google had PAN (Personal Network Access) or ORB implemented but they shipped because this is something of tremendous value.

As coep: required-corp is implemented today - its too restrictive and you lose many features like third party payment (say Stripe), or Zendesk Help plugins. 

So without credentialless: the choice is between SharedArayBuffer (SAB)/PTHREADS and core site functions. And SAB/PTHREADS loses - which is unfortunate.

To me all the great work done on SAB/THREADS in Safari of not much help without credentialless.

[Sanjay Kumar]

Please note this does not just block SharedArraybuffer/Atotmics/Pthreads - even Origin Private Filesystem (OPFS) can not be used without this header (unless off-course you are happy with coep: required-corp).

Not having OPFS especially is an obstacle (no offline SQLite etc. - you need unlimited amount of memory)

Please consider this a priority. Thank you.

[Jacob Bandes-Storch]

Hi there, any update on this issue? I work on a complex web app that, and we would love to start using SharedArrayBuffer but cannot use `require-corp` without breaking loading of some other resources.

Some reasons that this feature is needed are described quite thoroughly in this blog post (which is now ~3 years old): https://blog.stackblitz.com/posts/cross-browser-with-coop-coep/