Firefox Metro Win8 beta 28 not working

Installed/upgraded Firefox v27 to v28beta to try out the Windows 8 Touch version on my Surface Pro 2. Relaunched via menu link in desktop version. Opened up in Metro on my home page Google, but no menu bar anywhere. Closed and reopened using Metro icon. Opens to the start? screen showing history links tiles and other things, but still no menu bar. None of the links show work. Forced to restart in desktop mode.