When VrShell (Browsing) is disabled, and you press the app button, you are asked to take your headset off, and if you hit back, you're asked to take it off again.
We should either disable the app button when VrShell is disabled (and exiting WebVR means removing your headset), or we should make the DOFF optional and stay in VR when you back out of the DOFF. Preferably the former.
Comment 1 by vollick@chromium.org
, Sep 22 2017