Using the default HDView_example.xml and .htm files with minimum modification (file name only), a pano that displays fine in IE displays full width, but only about 20% of the available height in firefox.
We need to update our sample page in the hdview utilities package. That will happen soon. In the meantime an updated sample can be found here: http://research.microsoft.com/ivm/hdview/wa/default.htm Please just copy and re-purpose default.htm