Blend4web 16.05 - Enable Steroview -> Cardboard

Hello to all. I downloaded the Blend4web 16.05 version. I exported a simple scene (one cube), I turned on the server and sent to FAST PREVIEW mode. Under the STEREO VIEW the HMD SETTINGS mode it is off to display the GUI settings.
It is activated only on the phone? Or you can test the cardboard mode even from PC (UNITY style?)
Thank you and you are the best!

It is activated only on the phone? Or you can test the cardboard mode even from PC (UNITY style?)

I think using Mobile Emulation mode is one of the many ways emulating the phone on PC. Just change device mode and refresh a page.