This article explains what to do if you have been locked out of your Mozilla account two-step authentication login.

• If you received a message that your Mozilla account was locked because a confirmation email was returned, see the I'm having problems confirming my Mozilla account article instead.

Two-step authentication adds extra security to your Mozilla account by making it harder for someone else to sign in to your account. If you’ve gotten locked out of your two-step authentication login, you can use one of your previously saved backup authentication codes to securely regain access to your account. Alternatively, if you have a device still signed in to your account, you can use that device to disable two-factor authentication, so you can sign in to your account without two-step authentication.

I have my two-step authentication device

1. Go to https://accounts.firefox.com and sign in.
2. Enter the authentication code from your two-step authentication application.
3. After login, go to Security and click the Disable button next to Two-step authentication.
4. A confirmation prompt will appear. Click the Disable button in the Disable two-step authentication? prompt.

I have my two-step authentication device but it says invalid code

1. If you're using Google Authenticator, tap on the three-dot menu, go to Settings, select Time correction for codes, and then Sync now.

I lost my two-step authentication device but I have another signed-in device.

If you're locked out of your account but have a device still signed in via two-step authentication, you can use that device to disable two-step authentication:

1. Go to https://accounts.firefox.com and sign in.
2. Under Security, click the Disable button next to Two-step authentication.
3. Click the Disable button in the Disable two-step authentication? prompt.

I lost my two-step authentication device but I have a backup authentication code.

1. Go to https://accounts.firefox.com and sign in.
2. If you are prompted for a two-step authentication code, click Trouble entering code? and enter one of your previously saved backup authentication codes.
   • If you don't remember saving your backup authentication codes, check if your file was downloaded and saved with the filename <your_email> Firefox backup authentication codes.txt.
3. Go to Security and click the Disable button next to Two-step authentication.

I lost my two-step authentication device, can’t find my backup authentication codes and don’t have a signed-in device

Unfortunately, deactivation by Mozilla of two-step authentication is not supported, and you will not be able to access your existing Sync data. You can however create a new account with a different email address to begin syncing again.

I lost my two-step authentication device, can’t find my backup authentication codes and don’t have a signed-in device. Can I request to delete my Mozilla account?

In this case, it is currently not possible to delete your Mozilla account, since we don't have a way to verify your identity and ownership of that account. We recommend creating a new Mozilla account to use Firefox Sync and other services that require a Mozilla account.