UserAgent:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/40.0.2214.111 Chrome/40.0.2214.111 Safari/537.36 HMD/10 [DEO9.02]
Where HMD/10 - device type number
Unknown = 0,
HtcVive = 1,
OculusRift = 2,
GearVr = 3,
Cardboard = 4,
Daydream = 5,
OculusGo = 6,
WMR = 7,
IOS = 8,
OculusQuest = 9,
Index = 10,
Cosmos = 11,
OculusQuest2 = 12,
HPReverbG2 = 13
That's the only way to get HMD type in deo for now.