This is only for the passwords stored in the Password Manager, not the system.

https://support.mozilla.org/en-US/kb/use-master-password-protect-stored-logins Use a Master Password to protect stored logins and passwords

The password information is stored in two files in the profile folder. The files are encrypted. The Master Password adds another layer of security.

Thanks, I have never used Master password before.

Safari always asks current user password before showing saved ones, and Master password help cover it up.

I am glad to hear that your problem has been resolved. If you haven't already, please select the answer that solves the problem. This will help other users with similar problems find the solution more easily.

Thank you for contacting Mozilla Support.

Note that Firefox 67 can use Lockbox for handling the passwords when this extension is installed.

• https://mozilla-lockbox.github.io/faq.html
• https://github.com/mozilla-lockbox/lockbox-addon