its not the kind of popup your thinking of. there are many ways to get around popup blockers. such as user action like clicking a button or link will allow a popup to present itself. the popup was legitamate and came from the lw.com site. it was prolly just a marketing ploy.

(even though i am a firefox user, i still know that i can recieve popups if i take action to see it. (such as clicking a link can create a condition that the browser will think its a legitmate action by the user, and the user wants to see this.)) etc...