makeBar can be swiped, but errors on FFOS (help please)

I made the makeBar swipeable and tappable, but it doesn't navigate properly when the webmaker app is installed on FFOS. 

I'm navigating via ```document.location.href = "/make/" + that.$data.app.id + "/play";``` which works fine when webmaker is running in a browser.

How do we navigate pages within an installed app?