Xavier PopUp Killer 

Xavier's Popup Killer will kill all annoying pop-up windows before they appear on the screen. The popup stopper has full support for both pop-ups and pop-under ads, and each time a pop up is closed you will hear a cute sound effect.
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FilterGate 

FilterGate automatically blocks Popup-Windows, Banner-Ads, Privacy-invasions, Adult-content and more. FilterGate comes in one easy to use package offering you cleaner browsing and peace of mind.
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