Mozilla’s Firefox gained half a percentage point in market share at the expense of Microsoft’s Internet Explorer during August, continuing the steady climb of the open-source browser, a Web metrics firm said.

Firefox now owns 11.8 percent of the global browser market share, said Net Applications, a jump of .5 percent from July’s 11.3 percent. Internet Explorer, meanwhile, now accounts for 83 percent of browsers used to surf the Web; that’s down from July’s 83.5 percent.

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