diff --git a/components/script/dom/vrdisplay.rs b/components/script/dom/vrdisplay.rs
index 9785106c252..152601c4f71 100644
--- a/components/script/dom/vrdisplay.rs
+++ b/components/script/dom/vrdisplay.rs
@@ -74,6 +74,8 @@ pub struct VRDisplay {
     running_display_raf: Cell<bool>,
     paused: Cell<bool>,
     stopped_on_pause: Cell<bool>,
+    /// Whether or not this is XR mode
+    xr: Cell<bool>,
 }
 
 unsafe_no_jsmanaged_fields!(WebVRDisplayData);
@@ -129,6 +131,7 @@ impl VRDisplay {
             // This flag is set when the Display was presenting when it received a VR Pause event.
             // When the VR Resume event is received and the flag is set, VR presentation automatically restarts.
             stopped_on_pause: Cell::new(false),
+            xr: Cell::new(false),
         }
     }
 
@@ -551,8 +554,8 @@ impl VRDisplay {
                     let this = address.clone();
                     let sender = raf_sender.clone();
                     let task = Box::new(task!(handle_vrdisplay_raf: move || {
-                    this.root().handle_raf(&sender);
-                }));
+                        this.root().handle_raf(&sender);
+                    }));
                     // NOTE: WebVR spec doesn't specify what task source we should use. Is
                     // dom-manipulation a good choice long term?
                     js_sender
diff --git a/components/script/dom/webidls/XRSession.webidl b/components/script/dom/webidls/XRSession.webidl
index 4945880697a..b0785764a18 100644
--- a/components/script/dom/webidls/XRSession.webidl
+++ b/components/script/dom/webidls/XRSession.webidl
@@ -18,7 +18,7 @@ enum XREnvironmentBlendMode {
 
   attribute double depthNear;
   attribute double depthFar;
-  // attribute XRLayer baseLayer;
+  attribute XRLayer? baseLayer;
 
   // // Methods
   // Promise<XRReferenceSpace> requestReferenceSpace(XRReferenceSpaceType type, optional XRReferenceSpaceOptions options);
diff --git a/components/script/dom/xrsession.rs b/components/script/dom/xrsession.rs
index bbb4626b5e8..40ccb90fbd3 100644
--- a/components/script/dom/xrsession.rs
+++ b/components/script/dom/xrsession.rs
@@ -7,10 +7,11 @@ use crate::dom::bindings::codegen::Bindings::XRSessionBinding;
 use crate::dom::bindings::codegen::Bindings::XRSessionBinding::XRSessionMethods;
 use crate::dom::bindings::num::Finite;
 use crate::dom::bindings::reflector::reflect_dom_object;
-use crate::dom::bindings::root::{Dom, DomRoot};
+use crate::dom::bindings::root::{Dom, DomRoot, MutNullableDom};
 use crate::dom::eventtarget::EventTarget;
 use crate::dom::globalscope::GlobalScope;
 use crate::dom::vrdisplay::VRDisplay;
+use crate::dom::xrlayer::XRLayer;
 use dom_struct::dom_struct;
 use std::cell::Cell;
 
@@ -20,6 +21,7 @@ pub struct XRSession {
     display: Dom<VRDisplay>,
     depth_near: Cell<f64>,
     depth_far: Cell<f64>,
+    base_layer: MutNullableDom<XRLayer>,
 }
 
 impl XRSession {
@@ -29,6 +31,7 @@ impl XRSession {
             display: Dom::from_ref(display),
             depth_near: Cell::new(0.1),
             depth_far: Cell::new(1000.),
+            base_layer: Default::default(),
         }
     }
 
@@ -61,4 +64,12 @@ impl XRSessionMethods for XRSession {
     fn Mode(&self) -> XRSessionMode {
         XRSessionMode::Immersive_vr
     }
+
+    fn SetBaseLayer(&self, layer: Option<&XRLayer>) {
+        self.base_layer.set(layer)
+    }
+
+    fn GetBaseLayer(&self) -> Option<DomRoot<XRLayer>> {
+        self.base_layer.get()
+    }
 }