I have plugged the headphone but it doesn't show icon on status bar is it ok. (gogi.in)
In addition shelf customization has been improved, a new status bar icon option has been added and there is also quick launch for 3rd party apps. (gogi.in)
You can swipe to the left in the small black status bar at the bottom of a page and it will act like a back button would. (dearauthor.com)