First, it's great to see expanded support for VR. Clicking a "View in VR" button is much nicer than appending "/embed?cardboard=1" (or whatever it was) to the end of the URL on a mobile phone.
Next, I'm a little confused about the camera behavior when viewing in VR. Even if you switch to First Person mode first, it looks like it automatically switches back to Orbit mode when you hit "View in VR", which isn't what you want when wearing a VR headset. See the following series of screenshots.
First, I open a model on my phone's browser and switch to first person:
Next, I hit "View in VR" then "Fullscreen." I check the view mode and see that it has switched back to Orbit:
I switch back to First Person, and this causes the camera to rotate (I was holding my phone as still as possible through this whole process):
Then I need to rotate my phone about 120 degrees (real world) to get roughly back to my original view:
I just checked and realized that I did not properly follow all the steps in this tutorial, mainly that I did not set the camera's field of view to 120 degrees (it's at 45 degrees):
I'm not sure if that contributes to some of my issues, but it still seems like "View in VR" mode should default to first person view (or stick with whatever view you had selected instead of switching back), correct?
This is on Chrome on an HTC One M8, Android 5.0.1.