[wpe-webkit-mir-kiosk 2.44.1] closing multiple windows or current window

[m4rtinvdbij]

I have a business html application trying to use in a kiosk to use in printing room.
The application sometimes opens a new window, which opens fullscreen in the kiosk. The close button does work in normal clients, but not in the kiosk. The call is window.close().

Does wpe-webkit-mir-kiosk acutally uses multiple windows, and/or does it open the new window as a "next" page and does the close button has to use a form of history.go(-1) kind of solution?

Where can i read more of the different behaviour in comparison of desktop clients.