Can you see how <canvas> manipulates?

I am intrigued about how this globe’s WebGL animation is rendered:

http://ats-vs-world.cadillac.com/#!/home

Unlike other HTML elements, I did not understand the way to see how the canvas element manipulates.

In Chrome and other browsers, you can "Modify ... subtree modifications", "Break ... attribute changes", etc. With canvas, when it is being controlled, the element sits empty.

Is there any way to do this?

EDIT: I really appreciate @Joe's answer. But is there any way at all (in particular, not for this website), see how they manipulate it?