Get the Whitepaper called Why Silent Updates Boost Security – This paper analyzes the effectiveness of different web browser update mechanisms.
You can download it from the following link: https://packetstormsecurity.com/files/download/77288/browser_silent_updates_2009.pdf
Source: https://packetstormsecurity.com/files/77288/Whitepaper-Why-Silent-Updates-Boost-Security.html