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 The small popups on bottom right sounds like Web Push Notifications from sites you have allowed to send you notifications from. Unfortunately some sites decide to use that function to send fake virus alerts or spam multiple notifications when one or two a day is enough. You can revoke these sites from sending you notifications. Also you should not post your email in public unless you want to potentially get additional spam from spam bots