Yes - there has been a shift from Firefox/Firebug over the last couple of years. Google has put a lot of effort into improving the developer experience, both UI

Yes - there has been a shift from Firefox/Firebug over the last couple of years. Google has put a lot of effort into improving the developer experience, both UI and features, while F/F has improved at a somewhat slower pace. Google has also put a lot of effort into courting developers at conferences and with blog posts and video tutorials with people like Paul Irish and Addy Osmani. It has been very effective - just look how often Chrome DevTools is now mentioned on HN vs Firebug. Lastly the growth of Chrome's browser marketshare means it make more and more sense to develop on Chrome. One key to all of this was the earlier switch to more frequent and automatic browser updates. Editorial: I'm not sure this is a good thing. Chrome DevTools can be used to influence the web dev ecosystem and Google has very different interests than most developers. But so far they seem to be playing fair as best I can tell.