You can clone with
HTTPS or Subversion.
1. Open http://html.adobe.com/webstandards/csscustomfilters/cssfilterlab/
2. Notice the loading page doesn't change
3. Open Firebug console
NS_ERROR_FAILURE: Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIDOMHTMLCanvasElement.getContext]
No errors and instructions on how to download a supported browser for my OS
Thanks for the bug report. Seems like we will have to get the same set-up you have as we have not seen this problem on FF yet I believe.
fix for Issue #13