While I don't doubt that lame-ass Chrome has dominance, there's also something tricky to remember here. Browser dominance is measured through sites logging the relative number of 'User-Agent' headers that come their way, but for an increasing number of major sites (Steam store comes to mind), browsers such as Firefox and Opera as default behaviour will actually spoof being a Chrome user-agent, because otherwise the site won't actually work properly. I do wonder if we're really gathering the metrics here in an accurate way.