Block popup windows while surfing. Define rules to allow/disallow popups
The Pop-Up Exterminator prevents those pesky pop-up windows from appearing while you're surfing the web. Pop-up windows are quickly closed and don't have a chance to display their contents. The Pop-Up Exterminator can be temporarily disabled by holding down the CTRL key while a pop-up window appears. The Pop-Up Exterminator is very intelligent and customizable. By default, it closes all pop-up windows. This default behaviour can be overwritten.
Pop-Up Exterminator - details 
