it not so fast as chrome, not have so many productive add-ons as chrome and firefox, not so flexible and customizable as firefox, not so open and powerful as firefox.
right, so what mcot2 is saying is that you're using most of safari anyway. safari was just a thin shell on top of webkit. I'm sure apple spent most of it's time improving webkit and not much time making the UI shell around it.
it not so fast as chrome, not have so many productive add-ons as chrome and firefox, not so flexible and customizable as firefox, not so open and powerful as firefox.