diff --git a/dom/animation/AnimationUtils.cpp b/dom/animation/AnimationUtils.cpp
index 0add3c3a6b8b..476652f77876 100644
--- a/dom/animation/AnimationUtils.cpp
+++ b/dom/animation/AnimationUtils.cpp
@@ -6,6 +6,7 @@
 
 #include "AnimationUtils.h"
 
+#include "nsContentUtils.h" // For nsContentUtils::IsCallerChrome
 #include "nsDebug.h"
 #include "nsIAtom.h"
 #include "nsIContent.h"
@@ -63,7 +64,7 @@ AnimationUtils::IsOffscreenThrottlingEnabled()
 }
 
 /* static */ bool
-AnimationUtils::IsCoreAPIEnabled()
+AnimationUtils::IsCoreAPIEnabledForCaller()
 {
   static bool sCoreAPIEnabled;
   static bool sPrefCached = false;
@@ -74,7 +75,7 @@ AnimationUtils::IsCoreAPIEnabled()
                                  "dom.animations-api.core.enabled");
   }
 
-  return sCoreAPIEnabled;
+  return sCoreAPIEnabled || nsContentUtils::IsCallerChrome();
 }
 
 } // namespace mozilla
diff --git a/dom/animation/AnimationUtils.h b/dom/animation/AnimationUtils.h
index 94d346abc135..82ae69bc85af 100644
--- a/dom/animation/AnimationUtils.h
+++ b/dom/animation/AnimationUtils.h
@@ -63,10 +63,10 @@ public:
 
   /**
    * Returns true if the preference to enable the core Web Animations API is
-   * true.
+   * true or the caller is chrome.
    */
   static bool
-  IsCoreAPIEnabled();
+  IsCoreAPIEnabledForCaller();
 };
 
 } // namespace mozilla
diff --git a/dom/animation/KeyframeEffect.cpp b/dom/animation/KeyframeEffect.cpp
index c48867cb1361..00f63bc000a0 100644
--- a/dom/animation/KeyframeEffect.cpp
+++ b/dom/animation/KeyframeEffect.cpp
@@ -132,7 +132,7 @@ KeyframeEffect::SetIterationComposite(
 {
   // Ignore iterationComposite if the Web Animations API is not enabled,
   // then the default value 'Replace' will be used.
-  if (!AnimationUtils::IsCoreAPIEnabled()) {
+  if (!AnimationUtils::IsCoreAPIEnabledForCaller()) {
     return;
   }
 
diff --git a/dom/animation/KeyframeEffectParams.cpp b/dom/animation/KeyframeEffectParams.cpp
index 4490faed105a..25764069194c 100644
--- a/dom/animation/KeyframeEffectParams.cpp
+++ b/dom/animation/KeyframeEffectParams.cpp
@@ -115,7 +115,7 @@ KeyframeEffectParams::ParseSpacing(const nsAString& aSpacing,
 
   // Ignore spacing if the core API is not enabled since it is not yet ready to
   // ship.
-  if (!AnimationUtils::IsCoreAPIEnabled()) {
+  if (!AnimationUtils::IsCoreAPIEnabledForCaller()) {
     aSpacingMode = SpacingMode::distribute;
     return;
   }
diff --git a/dom/animation/KeyframeEffectReadOnly.cpp b/dom/animation/KeyframeEffectReadOnly.cpp
index cb8e668796a3..58349a669473 100644
--- a/dom/animation/KeyframeEffectReadOnly.cpp
+++ b/dom/animation/KeyframeEffectReadOnly.cpp
@@ -512,7 +512,7 @@ KeyframeEffectParamsFromUnion(const OptionsType& aOptions,
                                        aRv);
     // Ignore iterationComposite if the Web Animations API is not enabled,
     // then the default value 'Replace' will be used.
-    if (AnimationUtils::IsCoreAPIEnabled()) {
+    if (AnimationUtils::IsCoreAPIEnabledForCaller()) {
       result.mIterationComposite = options.mIterationComposite;
     }
   }