I posted a popular tip in the XP forum and the Browser forum about common FF speedups. The stock settings are very safe and not that fast.
In answer to your question. No.
I know firefox is better than MSIE. Still there are few problems. One of them which I feel very disgusting...
I see there is some problem in loading a page after some event. When I click a link, there is a delay transferring and receiving data from domain.
Do you all experience this?