I use a hardware USB token that does contain important and less-important passwords. The token acts as a virtual keyboard to the computer and thus it is compatible to any application. Problem is, with some previous version of FF I could use this device to set the master password in the passwort manager. The passwords do have a fixed length of 32 characters, are completely randomized and contain some special characters. Currently I am trying to set up a master password in the password manager of freshly installed and configured FF 45 installation. But unfortunately the password manager won't let me do this as it seems that the password in the first and in the second field are not the same. The button to save the password as the new master password stays disabled in the dialog. Normally I would assume, I just mistyped the second password. But thus I am using my USB token, this is not possible and the passwords in the two fields are definitely the same. I wonder if some maximum length has been introduced in a recent version or if there's a bug maybe with some of the special characters (though they are just the usual ones available on any US-Keyboard).