Unreal Engine's Zen Garden using WebAssembly: https://news.ycombinator.com/item?id=13820633
On Chrome 56 with default flags, the tab immediately crashes upon page load. I've tried enabling the "Experimental WebAssembly" flag, which prevents the crash but the demo fails to load with:
WebAssembly instantiation failed: TypeError: WebAssembly.instantiate is not a function