&gt; Emscripten running a crappy voice synthesizer might work, but nothing close to the silky smooth voices that chrome includes.<p>&gt; You kinda need to train the hell out of that thing to get it to recognize the difference between &quot;merry christmas&quot; and &quot;happy hanukah&quot;, and even then, it will only really work for one person.<p>So compile an engine you like better.<p>You claimed that voice recognition and synthesis &quot;could not possibly be done in any other browser&quot;. As in, it&#x27;s impossible. The fact is that you can do it by just compiling your favorite engine to asm.js, and people have done just that with several of them. So your sales pitch for Chrome is wrong.<p>If you want to say that it&#x27;s <i>easier</i> in Chrome because of the Web Speech API, that&#x27;s fine. But impossible in other browsers? I don&#x27;t believe it.