webassembly.api.Memory.Memory - Document the compatability status of 4GB heap

What type of issue is this?

Missing compatibility data

What information was incorrect, unhelpful, or incomplete?

WebAssembly added support of 4GB heap after https://github.com/WebAssembly/spec/issues/1116, but the compatability status is not documented.

What browsers does this problem apply to, if applicable?

Firefox, Safari, Chromium (Chrome, Edge 79+, Opera, Samsung Internet)

What did you expect to see?

Compatability status of browsers found yet:

• Chrome 83 https://v8.dev/blog/4gb-wasm-memory
• Firefox 89 https://bugzilla.mozilla.org/show_bug.cgi?id=1676441
• Safari 15.2 https://webkit.org/blog/12140/new-webkit-features-in-safari-15-2/

Did you test this? If so, how?

Build a wasm binary that can allocate memory, with MAXIMUM_MEMORY=4GB, and grow pages to 65536

Can you link to any release notes, bugs, pull requests, or MDN pages related to this?

• Chrome 83 https://v8.dev/blog/4gb-wasm-memory
• Firefox 89 https://bugzilla.mozilla.org/show_bug.cgi?id=1676441
• Safari 15.2 https://webkit.org/blog/12140/new-webkit-features-in-safari-15-2/

Do you have anything more you want to share?

No response

MDN URL

https://developer.mozilla.org/en-US/docs/WebAssembly/Reference/JavaScript_interface/Memory/Memory

MDN metadata

Start with the MDN WebAssembly Memory constructor page and the browser compatibility data entry it represents. Compare the linked Chrome, Firefox, and Safari references with the existing compatibility records; done means the 4GB heap support status is documented for the reported browsers and the data validation passes.