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Brought to you by Tim Babych, web-developer and Mozilla localizer from Ukraine, also known as @tymofiy.

Data provided by Gemius. Chart built with Highcharts. Source available on bitbucket.

Browser engines mentioned above are represented by their most prominent applications. You can find out more about them in those articles: Gecko (Firefox, Seamonkey), Webkit (Chrome, Safari), Presto (Opera), Trident (MSIE, Maxthon).