Firefox 55, is set to come out on August 8th complete with VR support. Firefox will be joining Google Chrome and Microsoft Edge, which also added web-based VR functionality this past year.
Web-based VR on Firefox will be available for all Windows users who have an HTC Vive or Oculus Rift headset. It’s WebVR allows browsers to run virtual-reality experiences. It’s already available in Firefox Nightly, the pre-release version of Mozilla’s browser, and has very limited availability in Servo, a browser engine built by individual developers and sponsored by Mozilla.