Why my Firefox and IE cannot load 3D canvas
<p><a href="https://joshcarllewis.com/static/articles/html5-3d-canvas-tutorial/demo.html" rel="nofollow">This page</a> used html5 3D canvas. In November last year, I used Firefox to access the page, it works fine. But now I find that I can't load the page using IE or Firefox(they show a black window, with no earth), it only works on Chrome. It's so weird. The tutorial and the code of the js can be found at: joshcarllewis.com/articles/html5-3d-canvas-tutorial .(sorry I can't insert more than two links.)</p>

<p><a href="http://i.stack.imgur.com/O1444.png" rel="nofollow">This</a> is what you should see after opening the page.</p>