hello friends. sadly it looks like new versions of firefox do not support the plugin that is currently used for the preview function on this website. so until a new plugin is found the previews might not work unless you are using explorer, safari, etc. apologies for the inconvenience, lameness, etc. but rest assured, we are on the case!
also, if anyone out there knows of a good music player plugin, feel free to contact pyr and let us know about it!