I have been using Lavasoft's adware and the spybot programs but I found one tonight that did much better. Check out the free use version of "spyware doctor" at http://www.tucows.com/
It found 61 bugs tonight that the others missed.
Fair enough, but I have heard of Firefox from multiple reputable sources, and trust it enough to give it a try.
So far, I don't know that your website is safe...
What references or guarantees can you give that it isn't, say, a 'phishing' site or whatever?
Sorry, just a little paranoia on my part tonight.
But, does it just scan and tell you have the spyware, or can it also delete the spyware ?