Pop Guard

Best Pop Up Blocker For Firefox - Are you tired of those pesky little ads while you surf the internet? Those are called Pop-Ups. Fun fact, even the creator of Pop-Ups has apologised for making them! But now that they are here, do you want to get rid of them, have the most surreal browsing experience ever and keep any kind of malware at bay?

https://popguard.org/popguard-firefox-extension/