Pop-Up Zapper watches the work of your web browser and when it identifies a pop up window it makes in invisible to you and closes the window. Once in a while you may see a window flash open and close really fast. You can look at Pop-Up Zapper's counter on its Dock icon to see that it is working. For registered users Pop-Up Zapper can notify you when the application has been updated with new features. A command key can be used to disable it anytime without having to bring it to the front. A command key can also be used to allow 1 single popup window to live.Download Pop-Up Zapper for Mac OS X