Looks like you're on Desktop instead of Android, so I'll move your question accordingly.

To your question about pop ups, you may want to check out the following article: Web Push notifications in Firefox.

I had these with McAfee. I was typing a micrsoft word docx, when the popup disappeared. Possibly they are timed out. But see Trust Pilot on this product. Company that size using scare-ware! Thr answer may be to wait a few days and see if it goes.