I have Firefox 2.0.0.9, which is probably older, and Internet Exploder 7 on Vista.
First noticed the day before yesterday on the Rendo home page. IE gave me a download warning saying it was trying to download outlook.exe from the site mentioned earlier. Not seeing any earthly reason to dowload any .exe file, I declined.
Interesting thing was that it was showing as an approved Microsoft file.

I checked in Firefox also and it gave me the "Download Active X" popup, which I also declined. So, depending on your browser security settings, I wouldn't be so sure you didn't get any bad stuff just because you use Firefox.