Web Environment Integrity – Google locking down on browsers

From the linked explainer at https://github.com/RupertBenWiser/Web-Environment-Integrity/...

> As new browsers are introduced, they would need to demonstrate to attesters (a relatively small group) that they pass the bar,

Good luck with that.

> Stakeholder feedback / opposition

> [Implementers and other stakeholders may already have publicly stated positions on this work. We will list them here with links to evidence as appropriate.]

> [Implementor A] : Positive

> [Stakeholder B] : No signals

> [Implementor C] : Negative

Google, W3C, Apple|Mozilla?