Pascoe

Thank you for the review.

Thanks Brent.

I still need to address the non-requirement of the extension and sort out a procedural issue in order to submit a PR against [credential-management](https://github.com/w3c/webappsec-credential-management).

Associated credential management PR: https://github.com/w3c/webappsec-credential-management/pull/224

I've addressed comments and added more clarification that the extension is not required.

Thank you!

Discussed on 4/30 call. Both Chrome and Safari don't abort requests when the page isn't focussed (well Safari does but then transparently restarts it when the tab is refocussed.)

`` might be an option.

I think this is the same as #1962.

There are in flight discussions regarding this, but I plan to make a PR removing the language. At least for platform credentials in case we need it.