given that your only problem is with Firefox, stop using Firefox when going to this site.
When I go to any of the below URL's in any version of firefox I get
an unresponsive script error. These errors do not occur in IE, chrome,
or safari. It seems like the error actually does not occur if you go to
a preview page that only has a few podcasts on it for example http://itunes.apple.com/us/podcast/joel-osteen-audio-podcast/id137254859
this one doesn't throw that error for me. If anyone knows why this is
happening or what the limit of podcasts on the preview page is before it
starts throwing those errors please let me know.http://itunes.apple.com/us/podcast/joyce-meyer-tv-podcast/id152445231