Finally, somebody makes a decent popup ad killer. So far, this one has worked perfectly for me--it disallows automatic popups, but when I click a link that creates a popup, it allows it to appear. The really nice thing about the way it kills popups is that it preempts them, rather than allowing them to partially load before killing them--you never even see the popup window. I've only been using it for a couple of hours, but it appears to be the perfect popup killer.