How are you guys doing the window management today on FirefoxOS? Is it Gaia? If so, how do you perform windowing in Gaia? The reason I ask is because that's one

How are you guys doing the window management today on FirefoxOS? Is it Gaia? If so, how do you perform windowing in Gaia? The reason I ask is because that's one capability the framework I work on (famo.us) is particularly good at. I know some people at Mozilla have worked with it on Firefox OS devices (speaking of which, we do need to get some of the newly released dev phones).