For testing the Mobile interface, I'll sometimes replace the .../home/home.jsp URL with .../one/one.app after logging in.

That works in Chrome and IE but in Firefox it is just hanging.  With the other browsers, my custom color background comes up, my logo zooms in, then I get the chatter page with the menu icon in the upper left and I can use the menu to get to various features.

In Firefox, I just get the background color, the logo never zooms in.  I get the menu icon and a couple other items on the feed page but nothing is clickable and I can't do anything.

Anyone know if that could be a bug in FF support?  Or maybe changing to the one/one.app URL is completely unsupported (unless you are actually in SF1 on IOS or Android) and it just works in a browser  by coincidence?