It would be great to include a small message or popup that says you need to use IE for the installer to run. I knew that the software requires IE to edit pages, but figured the installer would be fine in FireFox.
I left the installer open and went to do something, came back and it was still stuck in FF. Then viewed it in IE and it loaded up right away.
If there was some sort of clause saying "This installer is configured for IE." I wouldn't have wasted the 5 minutes.
Not really something needed, but the last thing you want is someone getting upset during the install process.