Internet Explorer was one of the most widely used web browsers, attaining a peak of about 95% usage share by 2003. This came after Microsoft used bundling to win the first browser war against Netscape, which was the dominant browser in the 1990s. Its usage share has since declined with the launch of Firefox (2004) and Google Chrome (2008), and with the growing popularity of operating systems such as Android and iOS that do not run Internet Explorer. Estimates for Internet Explorer’s market share are about 3.12% across all platforms or by StatCounter’s numbers ranked 6th, while on desktop, the only platform it’s ever had significant share (i.e. excluding mobile, and not counting Xbox) it’s ranked 3rd at 7.13%, just after Firefox (others place IE 2nd with 11.84% just ahead of), as of January 2018(browser market share is notoriously difficult to calculate). Microsoft spent over US$100 million per year on Internet Explorer in the late 1990s, with over 1,000 people working on it by 1999.
On March 17, 2015, Microsoft announced that Microsoft Edge would replace Internet Explorer as the default browser on its Windows 10 devices. This effectively makes Internet Explorer 11 the last release (however IE 10 and 9 also get security updates as of 2018). Internet Explorer, however, remains on Windows 10 primarily for enterprise purposes. Since January 12, 2016, only Internet Explorer 11 has been supported. Support varies based on the operating system’s technical capabilities and its support lifecycle.
Firefox usage grew to a peak of 32% at the end of 2009, temporarily making version 3.5 the world’s most popular browser. Usage then declined in competition with Google Chrome. As of March 2018, Firefox has 11.6% usage share as a “desktop” browser, according to StatCounter, making it the second most popular such web browser;usage across all platforms is lower at 5.44% (and then 4th most popular overall). Firefox is still the most popular desktop browser in Cuba (even most popular overall at 62.77%) and Eritrea with 78.3% and 91% of the market share, respectively. According to Mozilla, as of December 2014, there were half a billion Firefox users around the world.
Safari is a web browser developed by Apple based on the WebKit engine. First released in 2003 with Mac OS X Panther, a mobile version has been included in iOSdevices since the introduction of the iPhone in 2007. It is the default browser on Apple devices. A Windows version, now discontinued, was available from 2007 to 2012.