Hi, Thanks for reaching out! It looks like you're experiencing an issue related, but we’re having trouble understanding the exact problem based on the information provided.

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Looking forward to your update!

in subject a pop-up was discribed

Was this a small popup on bottom right corner of Firefox window? if so then this may just be a web push notification 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.

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

If this does not apply then you need to post a reply in Post a Reply box below with more information on what you are seeing.