[buu700]

Any idea if wasm / ES6 modules / module loader shims work with object URLs and/or data URIs cross-browser by design?

Doing something similar for Workers, one of the problems we've had is that IE and I think Safari block that, so to make it work we have to fall back on a permanently cached shim that puts an eval statement inside self.onmessage. (Obviously no equivalent to eval exists for wasm, or I wouldn't have a problem here in the first place.)