Help with Download Insight

Hi people,

I just recently updated my Norton internet security 2009 to 2010. However, as stated, the Norton internet security 2010 has this feature called download insight. However, I never saw it in action. When I download files, it never appeared. Is there something wrong. By the way I was using the browser Firefox. Also, how can I view a file details using the file insight. Please reply me as soon as possible. Thanks.