This question is not necessarily a Sencha issue, yet the discussion would be interesting nonetheless, so here goes.
Consider a link to a different site, using a button, like so:
Or, consider triggering the Facebook oAuth authentication flow for that matter, to allow the user to grant permission to post on the user's /username/feed for instance,
The problem is, then, that this works nicely if you run it in Mobile Safari.
However, if you put your app on your home screen, the app will redirect to the external site, but you lose your app context.
Are there ways around this? It seems an iOS issue, but since it affects the daily use of Sencha apps I started this topic