Rated 3 out of 5 stars
Con: Firefox is secure. Most of this "security" stuff is hyped up and not really accurate. I use it for stopping annoyances, not for the "security" that if offers.
Con: Would be nice if there was a blacklist mode instead of being whitelist-only.
Please check http://noscript.net/features#blacklist
Regarding "hyped up and not really accurate", please check with any web security expert such as Robert "RSnake" Hansen of SecTheory, Jeremiah Grossman of Whitehat security or Arshan Dabirsiaghi of OWASP: they're all loyal NoScript users...