I think it'd be preferable somehow to unify the UI design paths for Mozilla, in order to avoid totally different approaches. I.e. their design development for "native" or XUL Fennec as applied to the Qt based embedded one. Unless they'll go too much into Android specifics (I'm not familiar with that). It requires some thinking (if it's even possible at all). Ideally, in the future Mozilla can switch to using embedded IPC even on Android, so having a unified design somehow formalized is a plus. Though it'll probably require some declarative translation between some metaspec and resulting native variants. Just an idea. Right now they are too engrossed in Android, but it's bad. Since more native platforms will come up, they need some shared metadata to define the UI if they want it to be similar across platforms.