Firefox is the answer. No other option makes any sense, if you're serious about this stuff. I understand that some people like the UI or process model of other browsers better, and that's where the evaluation of priorities comes in.
The good news is that the days of Chrome's technical superiority are truly over.. Speed, memory consumption, rendering engine...Firefox is all there and sometimes better.
Firefox is also the only browser with an ability to sanely handle tabs on the side, which is the only sane place to put tabs on modern screens. If I had to choose between sane tabs and sane privacy policies, I might have some soul-searching to do. I understand that everyone has their own equivalent, but be sure not to dismiss Firefox based on historical issues.