Full Screen Flash Tutorial not compatible with Firefox browser?

Hey all you smart scripters,

OK this weekend I took a shot at making a full page flash page like the one found in the kirupa tutorial, it works… however the alignment when viewed in Firefox is awful. The html works within Internet Explorer, Safari, but not Firefox, which is a bummer since most PC users I know use firefox for web browsing. Download the tutorial and preview for yourself in Firefox. So what I am trying to get at is… there a way to create a simple html document that will work universally with ALL web browsers? Thanks:elderly:

http://kirupa.com/developer/mx2004/swf/myfile.html
preview the link above in firefox to know what I am talking about. I thought Firefox 2 would have fixed this but the same problem arises.:shifty:

Any suggestions or referred links?
Thanks:rambo: