How to hard limit the list of launched applications or interface on Android?

Question

Android

Task:
Tablets on Android 4.4 are used in a karaoke bar in conjunction with a karaoke machine. They have a mobile application installed that connects to the car via wi-fi, shows a list of songs available for order and sends an order for a specific song to the operator.
You want to restrict the tablet experience so that users can only see and run this application.
The bar also has a website, I would like the browser to open only it (but it’s already easier here - you can register it in the router).
Question - how not to allow anything to be opened except for a specific application and browser?
I'm considering options:
1) Some kind of mega hard minimalist launcher (which one)?
2) Make your own assembly?
3) Somehow configure Android so that you can not close an open application or open another.

Answer 1

This was discussed on habré:
habrahabr.ru/post/149561
In general, to make it easier to google, such a use of the device is called Kiosk Mode