Latest nightly build of firefox is failing all thread threads

[sbc100]

It seems the link the wasmMemory that we postMessage to each worker is not actually arriving correctly resulting in TypeError: can't access property "byteLength", wasmMemory.buffer is undefined / undefined on each thread.

I took a look at is in firefox devtool and indeed the e.data.wasmMemory that arrives on the workers seems to not have any properties at all.

[kripken]

Upstream Firefox issue: https://bugzilla.mozilla.org/show_bug.cgi?id=1876355

[kripken]

Fixed by #21282