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Firefox keeps displaying notifications of an infected system, including the presence of the ZEUS.2020 Trojan virus, but Windows Defender and my control panel say nothing is wrong.

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How can I get rid of false messages if no viruses are present, and if they ARE present, most easily detect and rid the system of them?

How can I get rid of false messages if no viruses are present, and if they ARE present, most easily detect and rid the system of them?

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Firefox is a web browser and not some form of antivirus or malware scanner.

Are these small popups on the bottom right corner of Firefox windows?. If so then these may just be web push notifications from sites you have allowed to send you notifications. Instead of being useful information, some sites may just send you junk, spam and fake virus/trojan alerts. 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