You have to restore this code because when the grid library is initialized the "landing page" must be deleted in order to set up the numberOfSpecialPages correctly

https://github.com/mozilla-b2g/gaia/blob/v1.2/apps/homescreen/index.html#L75

Or.. you add the role again (I don't know who removed this) to landing page or change the selector.

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You could move this code to the destroy method but you should change the order here

https://github.com/mozilla-b2g/gaia/blob/v1.2/apps/homescreen/js/configurator.js#L33

````js
provider.destroy();
startHomescreenByDefault();
```