--- a/gfx/vr/VRManager.cpp
+++ b/gfx/vr/VRManager.cpp
@@ -165,17 +165,19 @@ void
 VRManager::NotifyVsync(const TimeStamp& aVsyncTimestamp)
 {
   const double kVRDisplayRefreshMaxDuration = 5000; // milliseconds
 
   bool bHaveEventListener = false;
 
   for (auto iter = mVRManagerParents.Iter(); !iter.Done(); iter.Next()) {
     VRManagerParent *vmp = iter.Get()->GetKey();
-    Unused << vmp->SendNotifyVSync();
+    if (mVRDisplays.Count()) {
+      Unused << vmp->SendNotifyVSync();
+    }
     bHaveEventListener |= vmp->HaveEventListener();
   }
 
   for (auto iter = mVRDisplays.Iter(); !iter.Done(); iter.Next()) {
     gfx::VRDisplayHost* display = iter.UserData();
     display->NotifyVSync();
   }