The Firewall Breach Detected Support Scam Popup is a web browser advertisement shown by scammy remote tech support companies that try to scare visitors into thinking that a ransomware attack has been detected that that their firewall has been breached. The scam then tells you to call the listed number. It is important to understand that if you see this alert in a web browser, then your computer is fine! This is just an advertisement and you should not call the number or purchase any services from them.
This article was published first at Remove the Firewall Breach Detected Popup Scam
Source: Bleeping Computer