azakai answered this already, but it's nested deeply below: Firefox gives a cons...

		nnethercote on Oct 16, 2013 \| parent \| context \| favorite \| on: “The 'use asm' pragma is not necessary to opt into... azakai answered this already, but it's nested deeply below: Firefox gives a console warning if asm.js compilation fails. In fact, it also gives a console warning if asm.js compilation succeeds! So there's never any doubt, and JS semantics are maintained.