WebGL is the basis
WebVR becomes WebXR
A-Frame for web-based VR with HTML
VR headsets that A-Frame supports include HTC Vive with controllers and trackers, Oculus Rift with Touch controllers, Google Daydream with controller, Samsung GearVR with controller and Google Cardboard (source).
Overview of the VR Web based technologies.
Oculus Go or Gear VR device
It is possible to develop for those two devices with WebVR (which is WebXR now) . In this case you develop for the Oculus Browser. Have a look at the tutorial.
The easiest way to develop for Oculus Go or Gear VR is to use Unity.
Upcoming Blog posts
In the coming blog posts we cover Augmented Reality.