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The back button is now contextual, it appears in apps, but disappears when it can't do anything.


What about when an activity in app A opens an activity in app B? Can I still go back to app A's activity from app B's activity?


I just tested this (I think):

I opened a link from fb messenger in chrome. The back button is still there, and clicking it returned me to messenger. So yes I believe so.




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