Hello, I was wondering if there is a way to use a Yubikey USB set with a one time/same password (FIDO u2f) as a substitution for Firefox's Master-Ppassword, which is used to access FireFox's saved login user names and passwords? From my understanding, I believe there is a way to set a Yubikey (from Yubico) with the ability to provide the same password each time you psychically touch the yubikey USB with your thumb, thus providing the advantage of a longer and more complex password. I am setting up FireFox for my entire family and thought this would be a great and easy way for my OLDER in-laws to use FireFox's built in password manager and not worry about forgetting their Master Password (I will be permanently attaching Yubikey USB to their laptops with a wire string...LOL) I would love to hear your response or any suggestions regarding what I'm trying to achieve. Thank you for the hard work and thanks in advanced for your time.