Firefox Monitor is a security and privacy web application by Mozilla for managing passwords. It helps in improving the security level of any personal information for users against hacking. They can identify anything hackers have already known about them, at the same time be ahead against them. This web application reports any incident of leaking information from personal online accounts. It alerts when personal accounts from a new website are breached by unknown elements. Being a web application means it consumes fewer system resources compared to standard security software. On the other hand, it may lack any antivirus options to stop malicious files that could ruin computers and personal accounts.