https//cfry.github.io serves one application:
Dexter Development Environment version 4.
DDE has several deployment platforms.
This "cloud" variant is the easiest for most people to access.

DDE is an application that:

We highly recommend modern versions of the Chrome browser.
DDE will mostly work in Safari, but there's bugs in the user interface.
Chrome on Android phones doesn't work for large applications like DDE.

To drive a Dexter robot (not just the simulator)
please read: DDE4 Doc pane
User Guide/Configure Browser for DDE4 Cloud

Use DDE4.2.2 Released Jul 1, 2024
Use DDE4.2.1 Released May 2, 2024

This cloud-based DDE first appeared in late June 2023 so consider it alpha software.