There are docker containers for Slicer that allows you to run Slicer in a web browser. See for example this demo: https://bit.ly/2XAtqbu (click X11 session; I will keep this running for a while, but this is not a permanent service).
We would like to set up a demo server that can serve multiple users - see for example this topic: Can slicer3D be hosted on a rendering server?
Do you have funding or expertise to contribute towards this goal?