The site looks okay in Firefox 1.5.0.4 in the US.
However, I did a quick validate at
validator.w3.org/ and found several errors. I would recommend cleaning up the code and then seeing if the site still has problems viewing in Firefox.
Also, you need to use Javascript to correctly embed flash now and still be valid. I found a website a couple of months ago that recommended using the following type of code -
Code:
//nameoffiel.js
document.write('<object type="application/x-shockwave-flash" data="media/nameoffile.swf" width="110" height="301">');
document.write('<param name="movie" value="media/nameoffile.swf" />');
document.write('<a href="http://www.macromedia.com/go/getflashplayer" target="_blank">');
document.write('This section requires the Macromedia Flash Player to view</a></object>');
This validates for HTML 4.01 strict.
Hope this helps...