Although I had some troubles
with Internet Explorer 11's WebGL support - and I think it still has some bugs but I reported them to Microsoft - most of the features in CopperCube
now work nicely in that browser. That means WebGL is now a real, useful thing, it works in all major browsers.
Most people probably won't even notice this change - apart from the fact that now all WebGL runs without hassle - but it's amazing what functionality now is hidden behind a single click in order to run a WebGL scene from the editor.