I used them all upon my conversion to Mac, but now stick with Safari exclusively, except for when I need to use Download Helper on Firefox for some music needs. Whatever the memory issue may or may not me, with 8GB of RAM I don't care, and it is just too ****ed slick for me not to use. The two-finger paging? The "most visited" screen? I could go on and on with the seamless features that it has, that I find I am enjoying. I treid my level-derned BEST to find a reason NOT to use Safari, but finally stopped fighting it. It's just too slick and well-integrated not to use, *for me*.