Almost daily on Firefox, I get pop-ups like the one shown in the attached image. I have, a few times, bought items on MrTortilla's website and that's fine. What I don't want it pop-ups from them daily when I'm not even on their site. Where do I go in Firefox to say, "I'm not open to pop-ups from this site"? Somehow it must be listed as okay. Please don't tell me to delete all cookies because I like the prefills from most of them. If there's a specific cookie I need to delete, please explain how to get to that. Hopefully, it's just a setting somewhere of sites that are allowed to send pop-ups and I can be guided there to remove mrtortilla.com from that list. Thanks!