When working on the WebVR experimental API, it became clear that it would make more sense to have a combined API for VR and AR. Rather than changing the WebVR API significantly, a new specification was created: WebXR. At its core is the WebXR Device API which provides key capabilities for writing VR and AR applications in a web browser. The API is extensive, and at the time of writing it isn’t fully supported by all browsers. Our teams have used WebXR on several occasions, and we see the benefits described by the Immersive Web Working Group. For prototypes, we especially like that the experience is available immediately in a web browser. The development team doesn't have to go through an app-store process, and users can play with the experience without having to install an app. Given the status of the API and the fact it’s hidden behind a feature toggle in some browsers, we haven’t seen it used beyond proofs of concept and prototypes.