To view WebVR content on Microsft Edge, you use a Windows Mixed Reality headset. These headsets connect to the HDMI and USB ports of a compatible desktop or laptop computer running the Windows 10 Fall Creators Update.
Is your PC ready?
Download this app to confirm your PC will work with Mixed Reality hardware.
Alternatives to headsets
If you don't currently have access to a headset, you can use the Windows Mixed Reality Simulator to open an instance of the Microsoft Edge browser, and visit a site containing WebVR content.