If you were exposed to the misleading Mozilla Firefox Critical Error scam, it is most likely that you were redirected to a malicious page representing this scam. How could have this happened? Do you remember clicking a link or an advertisement right before the redirecting occurred? If you do, it is likely that you encountered a corrupted redirect link. You could also experience redirecting if you land on unreliable websites. There is one more scenario we have to consider, and that one involves malware. There is always a possibility that you could be redirected to random pages by an infection that is active on your operating system. If that is the case, you want to find and remove it as soon as possible. We suggest employing a trusted malware scanner, and you will soon find out if you need to delete Mozilla Firefox Critical Error scam-related malware.