codefrau 🦩 — discord 
[…] but it won't be as pretty or secure as when using IFrame Compositing. Right now, neither the meta shell (the html holding the iframes) nor the iframes (running each world) depend on being trusted, they execute completely isolated, and only minimal information is exchanged between them. If a frame was to send a screenshot to the shell or to another frame that could be a potential privacy violation – and something that is entirely avoidable by visual compositing in the browser.
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Rendering and compositing out of process iframes page
Out-of-Process IFrames (OOPIFs)