This is said about master password: Important: After you have defined and set your primary password, you will be prompted to enter it once for each Firefox session, when Firefox needs access to your stored passwords. This also applies if you want to add, remove or show a password. I think that "when Firefox needs access.." should be changed to "regardless if Firefox needs it or not". It would be much better if the master password promt was delayed until the first time it was needed.