Facebook's long rumored self-made phone has been given a codename and details in a leak Monday night. Nicknamed Buffy, intentionally named after the Joss Whedon TV series, the phone mentioned to AllThingsD would run a customized version of Android. It would overcome its frequent animosity towards Google by not just deeply integrating the social network but using HTML5 for apps, letting it run the new crop of titles from Zynga and others designed for Android and iOS browsers as though they were native apps.