It may not be quite as practical as the mobile version if you find yourself lost in the mall this holiday season, but those looking to plan their shopping route ahead of time can now finally take advantage of Google's indoor maps in their desktop web browser. That new addition, just rolled out today, does come with a bit of a catch, though: the desktop version of indoor maps is only offering the main floor of buildings for the time being, with no word yet on when the ability to view additional levels will be added (something that can currently be done