The most downloads for a single piece of software in 24 hours is 8,002,530 for Mozilla's Firefox 3.0 between 17-18 June 2008. This 'Download Day' marked the launch of the new version of the Firefox web browser. Mozilla Firefox is a free web browser that is developed by a team of volunteer programmers throughout the world. The Mozilla Foundation is a non-profit organization that seeks to promote open-source software.

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