LOL well I don't have any friends (or enemies I guess) that are
that good with computers (let alone hacking LastPass's server lol).
And I didn't see any option for a master password on FF's password manager (I immediately removed all my saved passwords from FF when I found out you could just click "show passwords" and see them).
As for LastPass, all you have to do is click an icon beside your address bar that prompts you for your master password, and when you enter that, the icon turns red and logs you in
So whenever I click MacInsiders, I see the front page for half a second and then lastpass kicks in and logs me in automatically.