 <p>You can try the default favicon location - i.e. place <code>favicon.ico</code> on the root of server (which is normally the ROOT application). In production you will almost always be running as ROOT. But I don't know if browsers will recognize that - if they don't, it means you can't do it. PDFs are read in the browser only if there's a plugin, so perhaps the normal favicon resolution doesn't happen.</p>