In a blog post, Microsoft stated:
WebVR is the next frontier in web graphics, enabling developers to create a wide range of truly immersive experiences for a variety of devices. Innovative and immersive WebVR content is already showing up on the web, and we expect to see even more coming as developers turn WebGL experiences into WebVR experiences.
Microsoft added that it is working with other companies such as Oculus, Mozilla and Google to help develop and advance the W3C WebVR specification. More info on the software and hardware details for Edge WebVR support will be revealed in the near future.