Mozilla have released an extension for Firefox which demonstrates:

the usefulness of semantic information on the Web, in real world scenarios

It searches for Microformats in the page you're viewing and then lets you use that information directly, for instance by posting hCalendar events directly into Google calendar. There is no specific statement implying this, but I'm assuming this is a glimpse of the future as far as Firefox is concerned - we're seeing what built in support for Microformats might look like in a future version of Firefox.