Hi Toodle, is this an issue with a Firefox Monitor report? Monitor lists known data breaches that had your email address. But many times, these are data brokers or marketing companies that buy and sell lists of user data. You never had an account with them; someone sold you out. If that is the situation, you usually do not need to change any passwords, but please check whether the breach leaked passwords. You may also need to be more cautious about phishing spam and other misuses of your information during the next few months if it's a fresh breach. * [[Resolve breaches with Mozilla Monitor]] * [[Mozilla Monitor - Frequently asked questions]] * [[Manage your Monitor notifications]] Is that what you were asking about? Let us know how we did and if you have more questions.