Firefox increasing rate since Firefox 1.0 was released on November 9, 2004, and Firefox had already been downloaded over one billion times. This number does not include downloads using software updates or those from third-party websites. They do not represent a user count, as one download may be installed on many machines, one person may download the software multiple times, or the software may be obtained from a third-party. In July 2010, IBM asked all employees (about 400,000) to use Firefox as their default browser. Firefox was the second-most used web browser until November 2011, when Google Chrome surpassed it. According
Internet Explorer issue was released the following day with the Security Update for Internet Explorer KB960714, on Microsoft Windows Update. In 2011, a report by Accuvant, funded by Google, rated the security (based on sandboxing) of Internet Explorer worse than Google Chrome but better than Mozilla Firefox. A more recent browser security white paper comparing Google Chrome, Microsoft Edge, and Internet Explorer 11 by X41 D-Sec in 2017 came to similar conclusions, also based on sandboxing and support of legacy web technologies. Internet Explorer has been subjected to many security vulnerabilities and concerns: much of the spyware, adware, and computer viruses across