ADI, a marketing research arm of Adobe Systems, found that the Chrome browser eclipsed IE in April, with 31.8 percent of U.S. market share vs. IE's 30.9 percent share. Coming in third was Apple's Safari browser, with a 25 percent U.S. market share (see figure). Those browser assessments were based on Web traffic sampling of both desktop and mobile devices, based on data from "10,000 U.S. consumer-facing Web sites in April 2014," according to Adobe's announcement.
Chrome took the lead because of the proliferation of mobile devices, in which Google's Android and Apple's iOS operating systems predominate. Much lower in the rankings was Mozilla's Firefox browser, with an 8.7 percent U.S. market share in April. ADI noted that Firefox has seen a 20 percent decline over a two-year period, which was "likely due to its lack of mobile presence."