The first version of Chrome is very fast. But supposedly the latest release of Firefox if also very fast. So I'm thinking of trying out the new Firefox and if it feels "fast enough," I'll wean myself off of Chrome, because the only reason I was using it was for the look and speed.
Making tweets about your latest articles is a good way to get more traffic. But you also have to balance your tweets, so that you're not only promoting yourself. You also need to promote other ideas and resources, so that your followers can benefit.