Internet monitoring firm Pingdom on Monday released a new report on global Web browser share by browser version. The company found Microsoft’s Internet Explorer 9 to be the most popular browser in North America with a 21.2% share, and it was closely followed by Google Chrome 18 at 20.2%. Internet Explorer, however, featured a combined total of 40.4% of the North American browser market. Globally, Pingdom found that Chrome 18 is the most popular browser with a 25.6% share, leading Firefox 11 with 15.8% and Internet Explorer 9 and 8 with 15.7% and 14.6%, respectively. Microsoft’s browser has the largest worldwide market share when all versions are combined, followed by Chrome and then Firefox.