Yes, a shop and a browser are preinstalled. This means that you can also buy a book in the ExLibris online shop and then download it directly to the device.

And how does the book purchase via the pc work? keyword adobe-id? or do you have to create such an id on the e-reader itself?

The Orell Füssli Shop is pre-installed on the devices purchased via Digitec.

I know that a shop is pre-installed (e.g. Weltbild OR Orellfüssli) and you can only link other libraries. Is it possible to choose between Weltbild and Orellfüssli when setting up the device?