It looks like the current code doesn't allow to display medias in Firefox 3.0.4 (working fine in IE6/IE7) because the URL used...

Changing from

concat("content/download/",$attribute.contentobject_id,"/",$attribute.content.contentobject_attribute_id,"/",$attribute.content.original_filename)|ezurl

to

$attribute.content.filepath|ezurl

solves the issue.

(Tried for Flash files)

Steps to reproduce

Publish a flash 9.x or 10.x file and try to display it using the standard ezmedia.tpl file...