--- a/dom/animation/KeyframeEffectReadOnly.cpp
+++ b/dom/animation/KeyframeEffectReadOnly.cpp
@@ -1446,24 +1446,28 @@ KeyframeEffectReadOnly::CanThrottle() co
     if (!HasEffectiveAnimationOfProperty(record.mProperty)) {
       continue;
     }
 
     EffectSet* effectSet = EffectSet::GetEffectSet(mTarget->mElement,
                                                    mTarget->mPseudoType);
     MOZ_ASSERT(effectSet, "CanThrottle should be called on an effect "
                           "associated with a target element");
-    layers::Layer* layer =
-      FrameLayerBuilder::GetDedicatedLayer(frame, record.mLayerType);
-    // Unthrottle if the layer needs to be brought up to date
-    if (!layer ||
+    layers::AnimationInfo* animationInfo =
+            layers::AnimationInfo::GetFromFrame(frame,
+                                                record.mLayerType,
+                                                GetPresShell());
+    // Unthrottle if the animation needs to be brought up to date
+    if (!animationInfo ||
         effectSet->GetAnimationGeneration() !=
-          layer->GetAnimationGeneration()) {
+        animationInfo->GetAnimationGeneration()) {
       return false;
     }
+    // Set the animationInfo to nullptr to prevent wrong using of the pointer.
+    animationInfo = nullptr;
 
     // If this is a transform animation that affects the overflow region,
     // we should unthrottle the animation periodically.
     if (record.mProperty == eCSSProperty_transform &&
         !CanThrottleTransformChanges(*frame)) {
       return false;
     }
   }