Io ho fatto così:
Codice HTML:
<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0" width="794" height="117">
<param name="movie" value="/images/LOGO.swf" />
<param name="quality" value="high" />
<embed src="/images/LOGO.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="794" height="117"></embed>
</object>
Se levo <embed> firefox non mi visualizza il banner!!