There's definitely something wrong with the pillow purchase page in Firefox. The page shows the imge at the top, with the pillow underneath. The image at the top overlaps the info on the right. If I click on the image to reposition it, it disappears, leaving only the pillow. If I click on the pillow, it then disappears and the main image comes back again.
As Chuck says, hitting F5 to refresh the page sorts everything out, but visitors wouldn't know to do that.