Two things.
First, I did try to install IE9, but it indicated that you must have the latest Windows (I was using Windows 7) to install.
Secondly, what was tested with Firefox? One thing I did find out was that blocking malware wasn't something that came out of the box, but through add-ons. My version of Firefox, with add ons, blocks malware and I haven't had a problem (based on cleaning program reports) for years.
This seems like more tripe from a Microsoft employee ... oh wait.