Umm, honestly, I just picked the most simple one. After the latest version of Firefox came out, I got one that just opened the a new window in IE, and that wasn't what I wanted, and had to wait a few weeks until the add-on made it to the new version. Let me check for you real quick.

I can't find exactly what I was using. The one they have now (IE View) sounds like it just opens a window in IE for you, which isn't really what we are talking about.