Use a Master Password to protect stored logins and passwords

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  • Revision id: 60553
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  • Creator: el.cameleon
  • Comment: rewriting of the introduction of the article. Hope it is clearer and more usefull.
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Firefox can save usernames and passwords that you use to access online services, such as banking and email websites in the Password Manager. If you share a computer with anyone, it is recommended that you use a master password in order to prevent another user to acces your usernames and passwords.

Note that they are other privacy issues related to sharing a computer, see How do I share Firefox between people on a computer? for more details.

Setting a master password allow Firefox to encrypt your usernames and password using Triple Data Encryption Algorithm. After you have defined a master password, you will be prompted to enter it :

  • the first time Firefox needs to access your passwords in order to connect you to a website, or you need to remember or remove a password,
  • each time you want to display your passwords list in the Password Manager.


Master Password - Win1

Defining a master password

By default, Firefox does not use master passwords to protect stored credentials. To define a master password:

  1. At the top of the Firefox window, click on the Firefox button and then select Options.At the top of the Firefox window, click on the Tools menu and then select Options.On the menu bar, click on the Firefox menu and select Preferences....At the top of the Firefox window, click on the Edit menu and select Preferences.

    Click the menu button New Fx Menu and choose Options.Preferences.

  2. Click the Security panel.
  3. Check mark Use a master password. Master Password - Win2
    The Change Master Password dialog appears.
  4. Enter your master password. The Password quality meter will indicate the difficulty of guessing the password. To create a quality password, your master password should include the following:
    • At least one capital letter.
    • One or more digits.
    • At least one non-alphanumeric character, such as the following: @ # $ % ^ & * ( ).
    • Also, remember to make your password something that is easy for you to remember, but difficult for others to guess to ensure that you, and only you, will be able to retrieve this secure information. For more information on choosing passwords, see Create secure passwords to keep your identity safe.
  5. Enter the password a second time to confirm that you can enter it consistently. Master Password - Win3
  6. To set the master password, click OK.
  7. Click OK to close the Options window.Click Close to close the Preferences window.Close the Preferences window. Close the about:preferences page.

Removing the master password

If you don't need a master password, you can remove it at any time:

  1. At the top of the Firefox window, click on the Firefox button and then select Options.At the top of the Firefox window, click on the Tools menu and then select Options.On the menu bar, click on the Firefox menu and select Preferences....At the top of the Firefox window, click on the Edit menu and select Preferences.

    Click the menu button New Fx Menu and choose Options.Preferences.

  2. Click the Security panel.
  3. Uncheck mark Use a master password. The Remove Master Password dialog will open.
  4. Enter the current password to confirm you are authorized to remove it.
  5. Click Remove.
  6. Click OK in the dialog that appears to confirm its removal.
  7. Click OK to close the Options window.Click Close to close the Preferences window.Close the Preferences window. Close the about:preferences page.

Changing the master password

You can also change your master password at any time:

  1. At the top of the Firefox window, click on the Firefox button and then select Options.At the top of the Firefox window, click on the Tools menu and then select Options.On the menu bar, click on the Firefox menu and select Preferences....At the top of the Firefox window, click on the Edit menu and select Preferences.

    Click the menu button New Fx Menu and choose Options.Preferences.

  2. Click the Security panel.
  3. Click Change Master Password.
  4. Enter the current password to confirm you are authorized to change it.
  5. Enter the new master password twice.
    • Leaving the two fields empty removes your master password.
  6. To accept the changed master password, click OK.
  7. Click OK to close the Options window.Click Close to close the Preferences window.Close the Preferences window. Close the about:preferences page.




Based on information from Master password (mozillaZine KB)