I saw this in Mozilla’s newsletter:
We are happy to release an updated version of our Unity Exporter. It now supports WebXR, the new cross browser API for VR and AR on the web. Unity is a great tool for building cross platform experiences, and this plugin expands the list of available targets. Take your existing VR app to the web and reach new users easily across desktop and mobile headsets. It also has support for running in a traditional browser outside of a VR headset which you can use to progressively add VR functionality to your games or apps.
