Hi,
We have had several requests for browser support and it is something we might explore in the future but we have no plans to support this in the short term.
There's an existing ArcGIS Idea here: Enable support in the Unity ArcGIS SDK for buildin... - Esri Community - it would be fantastic if you could share more details about your project/app in the ArcGIS Idea thread.
In the meantime, we've seen several users find pixel streaming to be a viable option for browser support.
Thanks
Mike
