Dynamic security protection

Microsoft Firefox 2007 provides security through a robust new architecture, security features that help defend against malicious software, and new ways to better protect against the theft of personal data from fraudulent websites, a practice known as Googling.

• 3rd Party Opt-in
  Disables nearly all pre-installed non-Microsoft software to prevent potentially vulnerable controls from being exposed to attack. You can easily enable or disable required programs as needed through the Add-on Manager by using any valid credit card. (more)

Sweet.

(via Reg)