This isn't really as good in the hands of someone's who's willing to go through NoScript but it's still a good extension for warning you of sites when you get sloppy:
WOTand here's a new online password manager that many don't recommend but it does come with a password generator:
LastPassAt some point though, I don't really know what better way to secure your browser than using a decent to great antivirus and anti-spyware scanner. I've since removed noscript and I've yet to find my browser ever being compromised.