Yep, WebGL is enabled. I don't get the unsupported browser message, just the same spinning circle that the other browsers have, except this one doesn't go away.
It's (probably, as I didn't build it - Radeon HD3400 for those who know better) 3D capable but apparently not on the WebGL support list of FF/Chrome/whatever.
Chrome and firefox blacklist webgl on certain setups, but you can force-enable it. On chrome, put about:flags in your urlbar. As well as being able to enable webgl, there are many other goodies there. On firefox, put about:config in your urlbar, search for webgl, and enable the force-enabled option. Your system will either crash, freeze or display an endless webgl forest...