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When Mozilla releases its Firefox 3 browser update June 17, it hopes to set the first-ever Guinness world record for number of Internet software downloads in 24 hours. The target: 5 million. That would be quite a feat, since the last Firefox update netted just 1.6 million downloads. But it’s no mission impossible. Firefox 3 speeds up browsing and adds a host of improvements, including the ability to adapt to your preferences as you use it. Over the past half-decade, Mozilla, an open-source software company, has gained grassroots support from some 170 million users and amassed an 18% worldwide market share, according to Web metrics outfit Net Applications. In the process, it has broken Microsoft’s (MSFT) grip on the critical browser market.
