Ya’ll are lifesavers! What’s weird is that it’s not always Firefox windows that are popping up. Most of the time it’s Internet Explorer windows. I don’t even open IE when I’m on my laptop!
OK then so it worked for you? You might want to check in TOOLS again and look for where it says ALWAYS VIEW THIS PAGE IN IE - make sure there is no check mark there - that works in you’re on a website where you have it turned on ...