Best Multi-Factor Authentication for Mozilla Firefox

How to use two-factor authentication with your Firefox browser for better online security

What is two-factor authentication?


Two-factor authentication, or 2FA, is a type of multi-factor authentication and adds an extra layer of security to online accounts by requiring an additional login step. After entering a password to log in, you’ll be asked to provide a security key which can come in the form of a numerical code, barcode, QR code, or other piece of information. Only by providing the right information will you be granted access to the account.

If a password is stolen or leaked online by a hacker and someone else is trying to log in to your account, they won’t be able to without the 2-factor authentication!

How does two-factor authentication work?

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Provide login credentials

The first half of the authentication process involves you entering your account login and password.

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Passcode is sent to mobile device

Your chosen authenticator app will generate a unique verification code on-screen as a QR code to scan or numerical code via text message. These tokens will vary across different 2FA apps.

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Verify the token

Your mobile device will then prompt you to confirm the unique token. This can be done by scanning the QR code or entering the numerical string sent to your mobile device.

Why use two-factor authentication?

The right two-factor authentication app makes browsing with Firefox more secure, without slowing down your day.

Add extra protection

Worried about phishing attacks or malware? Two-factor authentication keeps hackers locked out.


Simplify online security

Combining 2-step verification with a password manager eliminates the need to remember your passwords!


It's free!

Many popular two-factor authentication options, including LastPass Authenticator, can be downloaded for free.

How to set up two-factor authentication on Firefox

Choose an authenticator.

There are many options when it comes to two-factor authentication. The most popular options include apps that can be downloaded to your smartphone from your app store, like LastPass Authenticator, Google Authenticator, or Authy. LastPass supports many two-step authentication apps.


Enable it for your accounts.

Many websites and apps, including banks, social media, email, password managers, and more, offer the option to turn on two-factor authentication. In your Firefox account settings under Manage Account, look for security options and turn on two-factor authentication. Hit the enable button, then select your chosen two-factor authentication app for your account.


Log in with extra protection.

The next time you log in to the account, you’ll enter your password and be asked for your two-factor authentication, too. Enter the code from the app on your phone or tap the approval message sent to your smartphone.

Setting up your Firefox and authentication to work with LastPass


You can use mobile phone to authenticate any device where LastPass is installed

  1. Make sure you are signed into your LastPass account and your Firefox account in the browser on a laptop or desktop computer.
  2. Download the LastPass Authenticator app to your smartphone, or choose one of the other available multi-factor authentication options
  3. On your computer, in your vault under Account Settings, click on Multifactor Options and click the pencil icon next to LastPass Authenticator
  4. Set “Enabled” to yes and follow the steps to pair the app on your smartphone with your LastPass account
  5. Next time you log in to your LastPass vault, whether via the browser extension on your computer or the LastPass app on your phone, you’ll also get a notification to your mobile phone where you can approve the login



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