While the browser battles aren't as intense as they once were, browser makers continue to fiddle with their approaches. Most dramatically, after years of riding IE's dominance, Microsoft is moving on with the more modern Edge browser in Windows 10.
oogle Chrome has actually been in first place since 2012, according to fellow Web tracker StatCounter, which puts Firefox in second and Internet Explorer in third. Why the difference?
Each Web tracker uses its own somewhat unique methods and sources to determine Web traffic data. For example, Net Applications counts unique visitors per day rather than page views, covers around 40,000 websites and has a stronger presence in certain countries than other Web trackers. StatCounter analyzes the overall volume of Web traffic and tracks more than 3 million sites around the world.
SOURCE - CNET