Greetings webkit-dev,

We have been working on Anonymous iframe, and we would appreciate your feedback.

This is an attribute to the <iframe> element causing its document to be
associated with a new and ephemeral context.

It resolves a problem developers have using Cross-Origin-Embedder-Policy (COEP).
It allows embedding <iframe> that do not use COEP.

To achieve this, we rely on adding a nonce to the storage key used to access
shared storage by anonymous iframe. As part of the client-side storage
partitioning effort (declined across storage APIs, network state and Cookie
State),