Get started with Firefox Monitor

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Firefox Monitor is a data breach notification service offered by Mozilla that warns you if your online accounts have been involved in a data leak. Using the Have I Been Pwned database, Firefox Monitor keeps track of known data breaches and notifies you if your online accounts are compromised, providing guidance on how to proactively protect yourself going forward.

Check if you've been part of a known breach

To see if your online accounts have been exposed in a data breach:

  1. Open your web browser and go to monitor.firefox.com.
  2. Click Get started to initiate the search.
    Get started with Firefox Monitor 2
  3. Sign in to your Mozilla account. If you don't have one, create it before proceeding.
    sign in
  4. Scroll down to view the details of the breaches that could compromise your online accounts.
    Resolve data breaches

Now that you're aware of the breaches involving your online accounts, check Resolve breaches with Firefox Monitor to learn how to take proactive actions and mitigate the damage that could come from them.

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