Hello World doesn't work in FF8 / MAC

[GoogleCodeExporter]

What steps will reproduce the problem?
1. http://data.webglearth.com/examples/helloworld.html works fine in Chrome 15 
but not in FF 7/8
2. www.webglearth.com works fine in Chrome and in Firefox

What is the expected output? What do you see instead?
In Firefox, I see only atmosphere for HelloWorld, but webglearth.com works fine 
in FF and Chrome

What version of the product are you using? On what operating system?
I test HelloWorld so api.js on Chrome and Firefox / MAC OSX 10.6

Please provide any additional information below.

Original issue reported on code.google.com by laplace....@gmail.com on 12 Nov 2011 at 4:58

[GoogleCodeExporter]

I test HelloWorld on chrom 17 and firefox 10.0, on chrom , I see the atmosphere 
and a black earth, on firefox, I see the atmosphere and a white earth, I wonder 
the running result of the HelloWorld example is really like this?

Original comment by 513577...@qq.com on 6 Jan 2012 at 8:42