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Use a Master Password to protect stored logins and passwords

Site Moderator

Use a Master Password to protect stored logins and passwords

Firefox can save usernames and passwords that you use to access online services, such as banking and email websites. If you share a computer with anyone, it is recommended that you use a master password.

After you have defined a master password, you will be prompted to enter it once Firefox needs to access your stored passwords.

Master Password - Win1
Note: After you've set a master password, it needs to be entered the first time you remember a new password or remove passwords and each time you show your passwords, for each Firefox session.

Defining a master password

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

  1. Click the menu button New Fx Menu and choose Options.Preferences.
  2. Click the Security panel.
  3. Check mark Use a master password.
    Security - Use a master password - 38 Fx43Security-UseMasterPassword Fx48Security-UseMasterPassword
    • 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 have entered it consistently.
    Master Password - Win3
  6. To set the master password, click OK.
  7. Close the aboutSmiley Tonguereferences page. Any changes you've made will automatically be saved.

Removing the master password

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

Important: Without a master password, someone with access to your computer can view the passwords you have saved in Firefox.
  1. 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. Close the aboutSmiley Tonguereferences page. Any changes you've made will automatically be saved.

Changing the master password

You can also change your master password at any time:

  1. 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. Close the aboutSmiley Tonguereferences page. Any changes you've made will automatically be saved.



Based on information from Master password (mozillaZine KB)

6 REPLIES
Regular Contributor

Re: Use a Master Password to protect stored logins and passwords

The basic changes to be done are:

In addition, based on this thread, a section on using an OS user account and a screen saver that automatically locks your account within minutes must be added.

With this, the article scope would become more generic and it should be renamed in "How do I prevent people from accessing my passwords and other private data?".

Site Moderator

Re: Use a Master Password to protect stored logins and passwords

I don't agree with renaming and changing the scope of the article. I made a new revision to update the article with Windows 7 screenshots (using the ones in the pending revision by scoobidiver) and a few other minor edits.

Site Moderator

Re: Use a Master Password to protect stored logins and passwords

I approved my Jan 17th revision, partially based on the Sept 20 edits by scoobidiver but without OS sections that changed the scope of the article.

Shooting Star Contributor

Re: Use a Master Password to protect stored logins and passwords

I agree that sections on user accounts and locking your computer is too much for this article. However I've been thinking about and talking to the person working on SUMO taxonomy about a way to relate groups of articles by tasks. We could certainly have articles about OS user accounts and screensaver locks and then combine them in some way with articles like this and others (choosing secure passwords, etc) into a whole tutorial/course on security.

New Contributor

Re: Use a Master Password to protect stored logins and passwords

Master Password is not very useful because I was still able to access my bookmark and all other websites just by clicking cancel when prompt to enter the password, so what is the use of it

Site Moderator

Re: Use a Master Password to protect stored logins and passwords

Hi razaqalasadi
The MP is only used to encrypt and decrypt the usernames and passwords in the Password Manager as stored in the logins.json file.
It doesn't prevent access to other personal data or to the profile.
There are extensions that ask for the master password at startup, but any extension can be bypassed by starting Firefox in Safe Mode.

I will lock this old thread.
If you have any questions then please start a new thread for your question.