Assegnate 3 su 5 stelle

I've been looking for a way to hide the passwords in firefox for quite a while with no luck, which really surprises me. Sadly, this was no solution either. It has the same problem as a similar add-on called "secure login" so I will just copy what I wrote there:

the add-on is good but you can still see all the passwords in firefox very easily. If you log on to a site and go to Tools-options-passwords, it will allow you (the first time at least) to see the website names and usernames without the need to introduce your master pass. You just have to right click on the username and press 'copy' to get the password, it's that simple.
This could be perfect if that small detail were working. Also, I would love an option that simply prevented anyone from seeing my firefox passwords (and websites+usernames) unless you introduce the master pass but ONLY for that, I mean, I don't want to have to introduce my password at all, not even the first time I open my browser, I just want to make my passwords invisible without a pass. Could you implement that feature? then it would be a perfect add-on.

Questa recensione riguarda una versione precedente (1.16.1.1-signed) del componente aggiuntivo. 

This will never be possible with master password, you'll need another extension for that. Master password is not just an annoyance that asks for password, it encrypts protected content. Application does not store it anywhere, so without it it can't decrypt the content, therefor it will require user's input at least once per session.