Fix to prevent phishing in any browser
Its not just within Internet Explorer that one might walk into some nefarious holodeck contraption (fake webpage).
I see that there's a vulnerability that affects Firefox 1.0, Mozilla 1.7.5, Konqueror 3.2.2 and Opera 7.54 that allows a malicious website to spoof the URL displayed in the address bar, SSL certificate, and status bar (test your own vulnerability at Secunia's site).
The VSX workaround for Windows users is this: copy & paste the URL from the address bar into Notepad, and look for any false characters. Or, if following a link from an email, rather than clicking on it, copy that into Notepad, and paste the text into your browser address bar.