Firefox compatibility problems with transparent Flash
Firefox doesn't support SWF files in so called windowless mode (transparent Flash animation).SYMPTOMS: Flash movie with mouse interactivity doesn't work. Flash plays but none of the buttons is clickable.
Windowless mode is defined by the following WMODE tags
<PARAM NAME="WMODE" VALUE="transparent">
and
<EMBED SRC="movie.swf" ... WMODE="transparent" ...>
SOLUTION: change WMODE to "opaque"