Not really a shelf bug. Arguably not really a launcher bug either, more like a general navigation thing... Whom should we route this to? Making this UI > Shell for now.

Since it's sort of homecher related, we can take it.

Kejiashao@, what do you mean by 'bottom layer of the app'?

I'm guessing she meant once you've exhausted all the "layers" of "backitude" within the app? :-) Meaning that if you hit back once more, there's nowhere to go anymore within the app, the only thing that would make sense would be to take you out of the app and back to homecher?

Oooooooo. That's cool. Ok! Sammie, you worked on back button, do you think this is easily doable?

I interpret the same thing as Manu did. The  back button just generates the a VKEY_BACK event sequence, so it doesn't do anything that plugging a keyboard and pressing F1 doesn't do. So I think this is a general navigation thing. I remember there was a separate bug for a discussion on this, but I cannot find it. I think fukino@ and oka@ were on that thread maybe.

Found it! issue 812564

Thank you sir.

If that bug gets implemented, this bug will be fixed, so marking as duplicate.