Is there any way to put a master password on Safari? (Something like what exist on Firefox)

Hello everybody,

Is there any way to set a master password on my Safari?

I would like Safari to ask for a password before it starts to auto fill my passwords.

This feature is already exist on Firefox, but this is really missing on Safari (or I don't know about it).

PS: I don't want to lock my key chain. It is really hard to put my password every time my mac wants to access any password.

Thank you