Yes, it's running Linux apps on Docker, but not exactly using X11 forwarding. Instead, it uses a new HTML5 Xpra client to draw the window in a canvas in the br

Yes, it's running Linux apps on Docker, but not exactly using X11 forwarding. Instead, it uses a new HTML5 Xpra client to draw the window in a canvas in the browser. Keyboard and mouse events are proxied between the browser and the backend Xpra server over a dedicated websocket connection. This makes it possible for multiple people to see (and interact with) the same graphical application at once, though it's nothing like Google docs where you have multiple cursors at completely different places in the document. Our goal is just making open source mathematics related software even more available, and this is a tiny step in that direction, e.g., for students using Chromebooks and possibly being tutored remotely.