Other popup preventers have side effects that are as annoying as the problems they purport to solve. Examples:

	Some popup preventers force you to do all your browsing in a single window. Not PopUpCop.
	Some popup preventers suppress all popups, even ones you want. Not PopUpCop.
	Some popup preventers are based primarily on maintenance-intensive "allow" and "deny" lists. PopUpCop offers these as a feature for users who want them, but does not require or depend on their use.
	Some popup preventers suppress popups based on text in page titles. This is easily circumvented by web sites' periodically retitling their pages. PopUpCop uses decision methods that are far more subtle.
	Some popup preventers suppress popups based on destination site URLs. This is easily circumvented by web sites' periodically moving their sites and redirecting their URLs. PopUpCop uses decision methods that are far more subtle.

PopUpCop is the best tool for the job. It has the features and benefits you want.