Internet Explorer and Edge only run on Microsoft operating systems. (Each site's audience is different, and the decision to spend time and money to make grumpy IE11 match a comp should be made with that site's traffic in mind.) But that means as many as 1 in 20 United States users could be using either IE or Edge, and that means it's well worth considering testing your site in Microsoft browsers. Not much perhaps compared to the leader Chrome (61.77% in the U.S., 49.13% worldwide) or even the runner up Safari (15.09% in the U.S., 32.38% worldwide). The first in the series is Set Up Simulator and Test iOS Mobile Safari on Mac.Īccording to one well known source of desktop browser marketshare data, in November 2018 Internet Explorer usage was at 2.8% in the United States and 5.05% worldwide Edge usage was at 2.15% in the United States and 4.25% worldwide. This article is part of a series on running cross-browser tests directly on your primary computer.