[https://monitor.firefox.com/ Firefox Monitor] lets you find out if your private information has been leaked or stolen. For more information, see [[Firefox Monitor]]. __TOC__ =What is a data breach? What causes it and what are the consequences?= A "breach" is an incident where private information is stolen or accessed without permission. This is usually due to security weaknesses in the software that stores that information. [https://monitor.firefox.com/ Firefox Monitor] lets you assess where their personal data has been exposed. =I received the verification email from Firefox Monitor but I can’t log in to verify my email address.= You only need to click {button Verify Your Subscription} and Firefox Monitor will record that you’ve verified your email address. There is no need to log in. =What should I do if my phone number or physical address have been breached? Should I change those?= If you notice you are getting a large number of scam/unsolicited phone calls it may be related to a data breach. You might want to change your phone number or consider an app (on mobile phones) that lets you block scam or unsolicited calls. If you see suspicious activity at your address, consider reporting it to your law enforcement agency. =If a breach happened years ago, should I still worry?= That depends. The answer is yes if I you haven’t changed your password for that site since the breach happened or if you’ve reused that password on other sites. Once a password/email combination has been leaked, hackers often reuse that login on other websites. That is why it is so important that you don’t reuse passwords. A password manager like [https://1password.com/ 1Password], [https://www.lastpass.com/ LastPass], or [https://www.dashlane.com/ Dashlane] can generate strong passwords for you, and can help you manage unique passwords for your online accounts.

Firefox Monitor lets you find out if your private information has been leaked or stolen. For more information, see Get started with Mozilla Monitor.

What is a data breach? What causes it and what are the consequences?

A "breach" is an incident where private information is stolen or accessed without permission. This is usually due to security weaknesses in the software that stores that information. Firefox Monitor lets you assess where their personal data has been exposed.

I received the verification email from Firefox Monitor but I can’t log in to verify my email address.

You only need to click Verify Your Subscription and Firefox Monitor will record that you’ve verified your email address. There is no need to log in.

What should I do if my phone number or physical address have been breached? Should I change those?

If you notice you are getting a large number of scam/unsolicited phone calls it may be related to a data breach. You might want to change your phone number or consider an app (on mobile phones) that lets you block scam or unsolicited calls. If you see suspicious activity at your address, consider reporting it to your law enforcement agency.

If a breach happened years ago, should I still worry?

That depends. The answer is yes if I you haven’t changed your password for that site since the breach happened or if you’ve reused that password on other sites. Once a password/email combination has been leaked, hackers often reuse that login on other websites. That is why it is so important that you don’t reuse passwords. A password manager like 1Password, LastPass, or Dashlane can generate strong passwords for you, and can help you manage unique passwords for your online accounts.