Did a little more testing of the Physic engine to see the results.
Internet Explorer version 11- All Physics Engine run fine on it
Google Chrome version 33.0.1750.117 m--Box2Dasm.js and CocoonJS ran perfectly fine
But for Firefox Mozilla 27.0.1- Only CocoonJS native made it run 'decent'.
It would be nice for the SYSTEM to have a browser option that returns what browser is running so that we can set what physics engine to use.
But it appears when making it for the android mobile and testing through CocoonJS it didn't affect performance on my phone so that is good.
The funny thing is I tested each browser with html5test website and IE Has the lowest HTML5 compatibility score!! :/
IE 365 out of 555
Chrome 503 out of 555
Firefox 448 out of 555