It was almost a month ago that Mozilla announced it would be working on a Metro version of Firefox, however an important question remained. Would Metro Firefox be little more than a live tile that was more of a pain than it was worth? Or would Microsoft allow them to take over default access for opening links and other non-sandbox friendly operations? We finally have an answer, and even though it is still somewhat vague, it looks like Microsoft is going to great lengths to make sure users can replace Internet Explorer in metro should they feel so inclined.
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Maximum PC | Microsoft Will Allow Third-Party Metro Browsers Special API Access To Compete With IE