Curious that they used the most recent version of IE against an older version of Firefox. Firefox 5.0, the current version, is reputed to have improved security features.
Firefox 5 came out a couple of weeks ago and the article said they ran the comparison in April. You can’t compare what isn’t there yet.
It says at the end. FF 5 was still in beta at the time of the test.
probably because the test was set before they could get firefox 5. Isn’t FF5 fairly new? But the article does address that and says ff5 uses the same engine for this feature.