From the last PlayCanvas bulletin:
We've spent a couple of weeks building Dungeon Fury, which we believe is the first ever 3D browser game for mobile. You can play it here:
WebGL in mobile browsers is pretty cutting edge, so while it performs well in Firefox for Android, you'll find the latest 'Nightly' builds run it even better. If you're using Chrome for Android you'll need to enable WebGL via the chrome://flags url. Don't worry if you can't play it on a mobile, it works great in desktop browsers too. This is a great example of the power of HTML5 and PlayCanvas, a single code-base for both mobile and desktop; a sharable URL for easy virality and great looking graphics.