Ever since RockMelt launched its social browser, it's been known unofficially as the Facebook browser. Facebook chat, status updates and sharing are all built right into the browser. Now Facebook and RockMelt are officially working together in a product partnership, and the first fruits of that collaboration can be seen in the latest release available today, RockMelt 3. RockMelt is still an independent browser with only a few hundred thousand active users. Facebook made no investment in RockMelt, nor is it going to help promote or distribute the browser, at least initially. Its product teams, however, are working closely with RockMelt to make sure that its Facebook features shine. "The partnership is based on a shared belief that social should join navigation and search as fundamental capabilities of the browser," says RockMelt CEO Eric Vishria.