Firefox users need to update their browser software following the release of updates designed to fix multiple security vulnerabilities.
There's also a flaw in the handling of XUL popups that means it might be possible to spoof the browser's location bar, a type of attack that phishing fraudsters would doubtless find useful.
As well as fixing various security bugs, Mozilla has introduced modifications with version 18.104.22.168 of its browser to enhance stability and improve support for Vista.
More background can be found via an advisory from the Mozilla Foundation here. ®