I use Firefox FTW, most customized browser ever. But really, they should start keeping the memory usage as low as possible, and they should start doing something for add-on site, it is easier to find variety of extension on chrome than firefox. Still don't like the fast pace upgrade.
I still use Chrome, for the PORN MODE(ctrl + shift + n). Chrome is fast, a little faster from firefox with little lower memory usage(they separate the process per tab, which seems like lower memory usage than firefox), no hassle.