If you're running on Google Chrome, click the spanner in the top right hand corner of the page, then tools. Click the arrow to the right, and click extensions. You'll find the peep pop up extension shows there with the option to get rid of it.
im running on firefox, and price peep is driving me crazy, its not in my programs to uninstall, and cant find it in my add ons... what do i do? i tried disabling it via their website, but this did nothing.