<A HREF="http://news.zdnet.com/2100-1009_22-5517149.html?tag=zdnn.alert">A vulnerability in Firefox</A> could expose users of the open-source browser to the risk of phishing scams, security experts have warned. The flaw in Mozilla Firefox 1.0, details of which were published by security company Secunia on Tuesday, could allow hackers to spoof the URL in the download dialog box that pops up when a Firefox user tries to download an item from a Web site.