I wouldn't categorize Google as the leader anymore. Mozilla and Microsoft have caught up and are as much leading the charge as Google is. Four years ago I would have agreed but four years ago we needed Google to push the browser forward.
The stats seem to disagree (1): Chrome has risen from a global usage share of 20% in 2011 to almost 50% today. Compare that to Firefox (2011: 28%, now: 16%) and IE (2011: 44%, now: 18%).
