diff --git a/components/script/dom/webidls/XRWebGLLayer.webidl b/components/script/dom/webidls/XRWebGLLayer.webidl
index 0007b457f8e..5b26716ebd2 100644
--- a/components/script/dom/webidls/XRWebGLLayer.webidl
+++ b/components/script/dom/webidls/XRWebGLLayer.webidl
@@ -24,6 +24,7 @@ interface XRWebGLLayer: XRLayer {
   // Attributes
   readonly attribute boolean antialias;
   readonly attribute boolean ignoreDepthValues;
+  attribute float? fixedFoveation;
 
   [SameObject] readonly attribute WebGLFramebuffer? framebuffer;
   readonly attribute unsigned long framebufferWidth;
@@ -32,8 +33,8 @@ interface XRWebGLLayer: XRLayer {
   // Methods
   XRViewport? getViewport(XRView view);
 
-  // // Static Methods
-  // static double getNativeFramebufferScaleFactor(XRSession session);
+  // Static Methods
+  static double getNativeFramebufferScaleFactor(XRSession session);
 };
 
 partial interface mixin WebGLRenderingContextBase {
diff --git a/components/script/dom/xrwebgllayer.rs b/components/script/dom/xrwebgllayer.rs
index 933e8537f1d..6a86671ccff 100644
--- a/components/script/dom/xrwebgllayer.rs
+++ b/components/script/dom/xrwebgllayer.rs
@@ -17,6 +17,7 @@ use crate::dom::bindings::codegen::Bindings::XRWebGLLayerBinding::{
 };
 use crate::dom::bindings::error::{Error, Fallible};
 use crate::dom::bindings::inheritance::Castable;
+use crate::dom::bindings::num::Finite;
 use crate::dom::bindings::reflector::{reflect_dom_object_with_proto, DomObject};
 use crate::dom::bindings::root::{Dom, DomRoot};
 use crate::dom::globalscope::GlobalScope;
@@ -156,6 +157,13 @@ impl XRWebGLLayer {
         ))
     }
 
+    /// <https://www.w3.org/TR/webxr/#dom-xrwebgllayer-getnativeframebufferscalefactor>
+    #[allow(non_snake_case)]
+    pub fn GetNativeFramebufferScaleFactor(_window: &Window, session: &XRSession) -> Finite<f64> {
+        let value: f64 = if session.is_ended() { 0.0 } else { 1.0 };
+        Finite::wrap(value)
+    }
+
     pub fn layer_id(&self) -> Option<LayerId> {
         self.xr_layer.layer_id()
     }
@@ -292,6 +300,17 @@ impl XRWebGLLayerMethods for XRWebGLLayer {
         self.ignore_depth_values
     }
 
+    /// <https://www.w3.org/TR/webxr/#dom-xrwebgllayer-fixedfoveation>
+    fn GetFixedFoveation(&self) -> Option<Finite<f32>> {
+        // Fixed foveation is only available on Quest/Pico headset runtimes
+        None
+    }
+
+    /// <https://www.w3.org/TR/webxr/#dom-xrwebgllayer-fixedfoveation>
+    fn SetFixedFoveation(&self, _value: Option<Finite<f32>>) {
+        // no-op until fixed foveation is supported
+    }
+
     /// <https://immersive-web.github.io/webxr/#dom-xrwebgllayer-framebuffer>
     fn GetFramebuffer(&self) -> Option<DomRoot<WebGLFramebuffer>> {
         self.framebuffer.as_ref().map(|x| DomRoot::from_ref(&**x))
diff --git a/tests/wpt/meta-legacy-layout/webxr/idlharness.https.window.js.ini b/tests/wpt/meta-legacy-layout/webxr/idlharness.https.window.js.ini
index 4a83da3fb77..f7d261b8002 100644
--- a/tests/wpt/meta-legacy-layout/webxr/idlharness.https.window.js.ini
+++ b/tests/wpt/meta-legacy-layout/webxr/idlharness.https.window.js.ini
@@ -20,9 +20,6 @@
   [XRBoundedReferenceSpace interface object length]
     expected: FAIL
 
-  [XRWebGLLayer interface: operation getNativeFramebufferScaleFactor(XRSession)]
-    expected: FAIL
-
   [XRRay interface: attribute matrix]
     expected: FAIL
 
@@ -314,9 +311,6 @@
   [XRSession interface: calling cancelAnimationFrame(unsigned long) on xrSession with too few arguments must throw TypeError]
     expected: FAIL
 
-  [XRWebGLLayer interface: attribute fixedFoveation]
-    expected: FAIL
-
   [XRWebGLLayer interface: xrWebGLLayer must inherit property "fixedFoveation" with the proper type]
     expected: FAIL
 
diff --git a/tests/wpt/meta/webxr/idlharness.https.window.js.ini b/tests/wpt/meta/webxr/idlharness.https.window.js.ini
index 47f46135676..15162e81c1c 100644
--- a/tests/wpt/meta/webxr/idlharness.https.window.js.ini
+++ b/tests/wpt/meta/webxr/idlharness.https.window.js.ini
@@ -56,9 +56,6 @@
   [XRBoundedReferenceSpace interface object length]
     expected: FAIL
 
-  [XRWebGLLayer interface: operation getNativeFramebufferScaleFactor(XRSession)]
-    expected: FAIL
-
   [XRWebGLLayer interface: xrWebGLLayer must inherit property "framebuffer" with the proper type]
     expected: FAIL
 
@@ -257,9 +254,6 @@
   [XRSession interface: calling cancelAnimationFrame(unsigned long) on xrSession with too few arguments must throw TypeError]
     expected: FAIL
 
-  [XRWebGLLayer interface: attribute fixedFoveation]
-    expected: FAIL
-
   [XRWebGLLayer interface: xrWebGLLayer must inherit property "fixedFoveation" with the proper type]
     expected: FAIL