There's a Unity demo on the WebAssembly site if you want to see if it's enabled in your browser. Just tried it on Chrome beta and it worked. MS Edge 13 did the asm.js fallback.
Note : The demo is pretty slow to initialize
Note : The demo is pretty slow to initialize
I had it working in Chrome Canary yesterday. Can't seem to get it to work on Chrome 57 now though, even though in theory it supports WASM and WebGL 2.