Is this something indecently naughty??????
Well either way...youŽd probably use Aframe (plenty of other options too) but thats the one iŽve mostly seen used and tried. You basically build it, so that its fully viewable in any browser - but has a defined area <aframe></aframe> where the VR environment you design is loaded and the VR content called
You can read on it here: https://www.sitepoint.com/a-frame-the-easiest-way-to-bring-vr-to-the-web-today/
Or toy with it here: https://www.aframe.io
Obviously check out some other options too to see what suits ya (and/or scream at ElevatedX to release a ready made VR template if they havent already) - if they havent...iŽd simply learn the basic aframe logic/commands and edit them into a template