diff --git a/dom/base/nsContentUtils.cpp b/dom/base/nsContentUtils.cpp
index 23251f182ed6..277d278c3f7b 100644
--- a/dom/base/nsContentUtils.cpp
+++ b/dom/base/nsContentUtils.cpp
@@ -301,7 +301,6 @@ bool nsContentUtils::sIsCustomElementsEnabled = false;
 bool nsContentUtils::sSendPerformanceTimingNotifications = false;
 bool nsContentUtils::sUseActivityCursor = false;
 bool nsContentUtils::sAnimationsAPICoreEnabled = false;
-bool nsContentUtils::sAnimationsAPIElementAnimateEnabled = false;
 bool nsContentUtils::sGetBoxQuadsEnabled = false;
 bool nsContentUtils::sSkipCursorMoveForSameValueSet = false;
 bool nsContentUtils::sRequestIdleCallbackEnabled = false;
@@ -702,9 +701,6 @@ nsContentUtils::Init()
   Preferences::AddBoolVarCache(&sAnimationsAPICoreEnabled,
                                "dom.animations-api.core.enabled", false);
 
-  Preferences::AddBoolVarCache(&sAnimationsAPIElementAnimateEnabled,
-                               "dom.animations-api.element-animate.enabled", false);
-
   Preferences::AddBoolVarCache(&sGetBoxQuadsEnabled,
                                "layout.css.getBoxQuads.enabled", false);
 
diff --git a/dom/base/nsContentUtils.h b/dom/base/nsContentUtils.h
index 5c486af67b98..7dd33772fb91 100644
--- a/dom/base/nsContentUtils.h
+++ b/dom/base/nsContentUtils.h
@@ -2349,14 +2349,6 @@ public:
     return sAnimationsAPICoreEnabled;
   }
 
-  /*
-   * Returns true if the DOM Animations Element.animate() API should be enabled.
-   */
-  static bool AnimationsAPIElementAnimateEnabled()
-  {
-    return sAnimationsAPIElementAnimateEnabled;
-  }
-
   /**
    * Returns true if the getBoxQuads API should be enabled.
    */
@@ -3415,7 +3407,6 @@ private:
   static bool sSendPerformanceTimingNotifications;
   static bool sUseActivityCursor;
   static bool sAnimationsAPICoreEnabled;
-  static bool sAnimationsAPIElementAnimateEnabled;
   static bool sGetBoxQuadsEnabled;
   static bool sSkipCursorMoveForSameValueSet;
   static bool sRequestIdleCallbackEnabled;
diff --git a/dom/base/nsDocument.cpp b/dom/base/nsDocument.cpp
index 2b6d849512ab..0cf6baae025a 100644
--- a/dom/base/nsDocument.cpp
+++ b/dom/base/nsDocument.cpp
@@ -3276,16 +3276,6 @@ nsIDocument::GetAllowPlugins()
   return true;
 }
 
-bool
-nsDocument::IsElementAnimateEnabled(JSContext* aCx, JSObject* /*unused*/)
-{
-  MOZ_ASSERT(NS_IsMainThread());
-
-  return nsContentUtils::IsSystemCaller(aCx) ||
-         nsContentUtils::AnimationsAPICoreEnabled() ||
-         nsContentUtils::AnimationsAPIElementAnimateEnabled();
-}
-
 bool
 nsDocument::IsWebAnimationsEnabled(JSContext* aCx, JSObject* /*unused*/)
 {
diff --git a/dom/base/nsDocument.h b/dom/base/nsDocument.h
index b8efc4a35bff..9c45e72fee0a 100644
--- a/dom/base/nsDocument.h
+++ b/dom/base/nsDocument.h
@@ -158,7 +158,6 @@ public:
 
   virtual void StopDocumentLoad() override;
 
-  static bool IsElementAnimateEnabled(JSContext* aCx, JSObject* aObject);
   static bool IsWebAnimationsEnabled(JSContext* aCx, JSObject* aObject);
   static bool IsWebAnimationsEnabled(mozilla::dom::CallerType aCallerType);
 
diff --git a/dom/webidl/Animatable.webidl b/dom/webidl/Animatable.webidl
index 4c1396c99588..01070ea35bf4 100644
--- a/dom/webidl/Animatable.webidl
+++ b/dom/webidl/Animatable.webidl
@@ -20,7 +20,7 @@ dictionary AnimationFilter {
 
 [NoInterfaceObject]
 interface Animatable {
-  [Func="nsDocument::IsElementAnimateEnabled", Throws]
+  [Throws]
   Animation animate(object? keyframes,
                     optional UnrestrictedDoubleOrKeyframeAnimationOptions options);
   [Func="nsDocument::IsWebAnimationsEnabled"]
diff --git a/dom/webidl/Animation.webidl b/dom/webidl/Animation.webidl
index 6ef41bad8628..e45e6f03c390 100644
--- a/dom/webidl/Animation.webidl
+++ b/dom/webidl/Animation.webidl
@@ -12,8 +12,7 @@
 
 enum AnimationPlayState { "idle", "running", "paused", "finished" };
 
-[Func="nsDocument::IsElementAnimateEnabled",
- Constructor (optional AnimationEffect? effect = null,
+[Constructor (optional AnimationEffect? effect = null,
               optional AnimationTimeline? timeline)]
 interface Animation : EventTarget {
   attribute DOMString id;
diff --git a/dom/webidl/AnonymousContent.webidl b/dom/webidl/AnonymousContent.webidl
index 1ff265219e87..c1037ca55fe0 100644
--- a/dom/webidl/AnonymousContent.webidl
+++ b/dom/webidl/AnonymousContent.webidl
@@ -62,7 +62,7 @@ interface AnonymousContent {
   nsISupports? getCanvasContext(DOMString elementId,
                                 DOMString contextId);
 
-  [Func="nsDocument::IsElementAnimateEnabled", Throws]
+  [Throws]
   Animation setAnimationForElement(DOMString elementId,
                                    object? keyframes,
                                    optional UnrestrictedDoubleOrKeyframeAnimationOptions
diff --git a/modules/libpref/init/all.js b/modules/libpref/init/all.js
index fad6322683d4..34585d82046a 100644
--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -3077,12 +3077,6 @@ pref("dom.animations-api.core.enabled", false);
 pref("dom.animations-api.core.enabled", true);
 #endif
 
-// Is support for the Element.animate() function (a subset of the Web Animations
-// API) enabled?
-// Note that if dom.animations-api.core.enabled is true, this preference is
-// ignored.
-pref("dom.animations-api.element-animate.enabled", true);
-
 // Pref to throttle offsreen animations
 pref("dom.animations.offscreen-throttling", true);