Flash not displaying in Firefox when using Embed src="index_image.aspx?image=1234" to write binaries

I am attempting to dynamically write binary flash from db (legacy situation...not ideal) into an object's embed tag. This works in IE but not in Firefox. Code is below. Notice the "<embed src='/index_image.aspx?ImagePK=1140'" portion. That referenced aspx page grabs the binary content and writes it to the browser. I was wondering if anyone had any suggestions as to how to make this work in Firefox.

<OBJECT id='lrs' classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codeBase='https://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0'      height='155'      width='152' align='middle' valign='middle'>
        <PARAM NAME='Movie' VALUE='/index_image.aspx?StoreImagePK=1474'>
        <PARAM NAME='Src' VALUE='/index_image.aspx?StoreImagePK=1474'>
        <PARAM NAME='WMode' VALUE='Window'>
        <PARAM NAME='Quality' VALUE='High'>
        <PARAM NAME='AllowScriptAccess' VALUE='sameDomain'>
        <embed src='/index_image.aspx?ImagePK=1140' atomicselection="false" quality='high' name='lrs' height='155' width='152' align='middle' allowScriptAccess='sameDomain' swliveconnect='true' type='application/x-shockwave-flash' pluginspage='https://www.macromedia.com/go/getflashplayer' />
    </OBJECT>