What are the options to overlay a Remote Desktop Connection?
The connection is in fullscreen mode. So the taskbar of the host system is no longer visible.
A Brwoser on the host system runs a web application that sends notifications via the Notification API (https://developer.mozilla.org/en/docs/Web/API/notification).
These notifications should also be visible to the user during the work on the remote desktop system.
On a dual monitor system they are actually over the remote desktop connection. For a single-monitor system, the RDC window is not superimposed.
Running the remote desktop connection only in window mode would only be the last resort.
Any idea is welcome.