https://support.mozilla.org/en-US/kb/push-notifications-firefox https://support.mozilla.org/en-US/kb/push-notifications-firefox#w_how-do-i-revoke-web-push-permissions-for-a-specific-site Small popups on the lower right corner of Firefox windows may be web push notifications from sites you have allowed to send you notifications. Instead of useful information some may send you junk, spam, fake virus/trojan alerts etc. You can revoke these sites from sending you notifications as second kb link above shows.

Thank you for the info. However, the pop ups are from Mozilla; so your info did not solve my problem. Ron hidcrk@gmail .com