We have a custom application that calls a PDF document in to a frame in InetExploerer. However, it sometimes is very slow. So we have been trying to experiment with Firefox as an alternative. However, when I open the document inside the web app the fram where it would be displayed cannot be displayed, but the details are listed as they normally would on the right. I believe this is written in XHTML if that makes any difference. If you need specifics please ask. I will do my best to answer them as I am not a programmer, and he isn't here any longer.