I happened to see this post. I was waiting for Mike or Scoble to give a nice reply to this. Since no one commented, I am going ahead with this post. First of all, is Opera and Safari the latest version used for the comparison? Also does it take a simulation software to prove that Firefox is memory hogging. Any average computer user, who knows how to open task manager can see for himself, how much memory our Firefox eats up. Have Firefox and Thunderbird open at the same time, forget a big chunk of your RAM, simple.
While I agree with the fact that firefox 3 has lesser memory leak than firefox 2, I will not accept the fact anytime soon, that firefox is all set to beat opera for the light weight browser title.
Profile of Prabhu Subramanian