Here is the browser market share for June 2014, based on traffic to my top site (number in parentheses shows change from May 2014):
Google Chrome: 49.15% (-0.68%)
IE: 23.93% (+1.43%)
Firefox: 20.92% (-0.25%)
Safari: 2.98% (-0.33%)
Opera: 0.63% (-0.15%)
The big news in June was the large increase in IE market share, which more than made up for its drop in May. We investigated the mix of different versions of IE and didn’t see any notable changes from May to June, and there did not appear to be any news that was significant enough to cause a major IE uptick.
All other 4 major browsers went down. Chrome’s drop was its first in 2014. Firefox is now approaching the 20% mark. As recently as three years ago, Firefox’s market share was over 34%. This is equivalent to a drop of 40% in market share over just 3 years.