Prerequisites: FFOS 2.1 device or higher, MP Stage app installed Steps to reproduce: 1.Go to MP Stage and sign in with valid credentials 2.Find a paid app and try to purchase it 3.While in confirmation payment page, go to device settings and sign out from FxA 4.Go back to Mp Stage Expected results: Payment is cancelled Actual results: Payment confirmation page is still displayed. User can press the Buy button and "Payment complete " message is displayed, but after that user is prompted to sign in to continue. After signing in, we can see "Payment cancelled" message , which is very confusing since the app was already bought. Notes: This is an issue only for FFOS with native flow where we expect Marketplace to sign out if we signed out from device's settings

Based on the recently announced future plans for the Marketplace to remove payments, closing these bugs.