Internet Explorer hit a new two-year high with 58.4 percent in June 2014 and Chrome jumped from 17.7 percent in May to 19.3 percent in June. Usage of Apple's Safari browser is also faltering, with 5.3 percent this browser is back to the same marketshare it had in March 2013.
Why is that happening? That's a good question.Source: ZD Net
Certainly the improvements and publicity for Chrome and IE hasn't hurt any. Firefox's reputation, on the other hand, has been tarnished by adding ads to the web browser and by Mozilla's continuing CEO problems.
Adding to the problems is the fact that Mozilla's ad deal with Google is coming to its renewal date. This is significant because over 90 percent of Mozilla's revenue comes from Google but Google now has its own browser. It's hard to see Google renewing the deal.