I've visited some questionable websites looking for NFL streams over the last weekend. I had some pop ups with the usual phishing crap while on the sites but now I get a pop up window only when I'm on Ebay asking me to authenticate, but says it will not give my password to the site I'm on. It never identifies who is asking or what password and user name it's looking for. Of course I don't give it any info but I keep getting it. I've run the defender scan and superantivirus. The latter found tracking cookies but nothing else. They are cleaned up but I still get the pop up. Any suggestions? Windows 10 and Firefox is what I'm running.