Firefox 3.5 is blazing past 5.6 million downloads, having been released just a day and a half ago. While such uptake for Mozilla's upgraded browser is impressive, the bigger story is how Firefox 3.5 is upgrading the Web with its extensive support for HTML 5. Microsoft's Internet Explorer (IE) 8 has brought the company's browser back into the 21st century, but its sluggish (and perhaps perverse) response to emerging Web standards threatens to leave it in Web 1.0 Blunderland.

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