The nice thing about Mozilla's popup killer is that it's titled "Open unrequested windows" with a checkmark meaning that it's allowed. 95% of the legitimate sites open up popups correctly allowing them to still work while the ads/survey windows are always unrequested.

Anyone know of an IE blocker that can do this?

And also, a temporary way in Mozilla to reenable the above setting without resetting the preference? That 5ish% of the sites out there are annoyning with legitimate unregistered popups.