Originally posted here by The Grunt
You can't. I have dug and dug, and you have to let it open with IE. Doesn't matter to much, you can use IE for that and firefox for everything else. You can use MYIE2 to view sites that require IE as it runs the IE engine, but has much better security features.
Although you have to let it use IE, nothing is stopping you from blocking IE in your firewall that way it won't connect.

At least thats what i did.