You can clone with
We currently install and update apps using a very hacky technique: we manually edit the webapp registry. That requires us to restart B2G after installing/updating an app, prevents us from registering permissions for the app, and probably has all sorts of other undesirable consequences (like #181).
We should install/update apps using the mozApps API instead. And now that @rpl has implemented an addon <-> B2G bi-directional communications channel, we can do it.