Running your testpage on Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:23.0) Gecko/20100101 Firefox/23.0 I see the yellow cube.
But it should be tested on a Linux platform, too.
Running your testpage on Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:23.0) Gecko/20100101 Firefox/23.0 I see the yellow cube.
But it should be tested on a Linux platform, too.