diff --git a/dom/base/DOMPreferences.cpp b/dom/base/DOMPreferences.cpp
index e7f72e62d4b1..be91e9598c38 100644
--- a/dom/base/DOMPreferences.cpp
+++ b/dom/base/DOMPreferences.cpp
@@ -36,6 +36,7 @@ DOMPreferences::DumpEnabled()
 #endif
 
 PREF(ImageBitmapExtensionsEnabled, "canvas.imagebitmap_extensions.enabled")
+PREF(DOMCachesEnabled, "dom.caches.enabled")
 
 #undef PREF
 
@@ -47,6 +48,7 @@ PREF(ImageBitmapExtensionsEnabled, "canvas.imagebitmap_extensions.enabled")
   }
 
 PREF_WEBIDL(ImageBitmapExtensionsEnabled)
+PREF_WEBIDL(DOMCachesEnabled)
 
 #undef PREF_WEBIDL
 
diff --git a/dom/base/DOMPreferences.h b/dom/base/DOMPreferences.h
index 3b82d66e78f7..dda727d9a281 100644
--- a/dom/base/DOMPreferences.h
+++ b/dom/base/DOMPreferences.h
@@ -19,6 +19,10 @@ public:
   // Returns true if the canvas.imagebitmap_extensions.enabled pref is set.
   static bool ImageBitmapExtensionsEnabled();
   static bool ImageBitmapExtensionsEnabled(JSContext* aCx, JSObject* aObj);
+
+  // Returns true if the dom.caches.enabled pref is set.
+  static bool DOMCachesEnabled();
+  static bool DOMCachesEnabled(JSContext* aCx, JSObject* aObj);
 };
 
 } // dom namespace
diff --git a/dom/base/nsGlobalWindowInner.h b/dom/base/nsGlobalWindowInner.h
index b70d2db2b810..4881d5ecfce3 100644
--- a/dom/base/nsGlobalWindowInner.h
+++ b/dom/base/nsGlobalWindowInner.h
@@ -37,6 +37,7 @@
 #include "nsSize.h"
 #include "mozilla/FlushType.h"
 #include "prclist.h"
+#include "mozilla/dom/DOMPreferences.h"
 #include "mozilla/dom/BindingDeclarations.h"
 #include "mozilla/dom/StorageEvent.h"
 #include "mozilla/dom/StorageEventBinding.h"
diff --git a/dom/cache/Cache.cpp b/dom/cache/Cache.cpp
index d27a64cdd76d..8943af14c084 100644
--- a/dom/cache/Cache.cpp
+++ b/dom/cache/Cache.cpp
@@ -17,6 +17,7 @@
 #include "mozilla/dom/cache/CacheChild.h"
 #include "mozilla/dom/cache/CacheWorkerHolder.h"
 #include "mozilla/dom/cache/ReadStream.h"
+#include "mozilla/dom/DOMPreferences.h"
 #include "mozilla/ErrorResult.h"
 #include "mozilla/Preferences.h"
 #include "mozilla/Unused.h"
@@ -517,29 +518,6 @@ Cache::Keys(JSContext* aCx, const Optional<RequestOrUSVString>& aRequest,
   return ExecuteOp(args, aRv);
 }
 
-// static
-bool
-Cache::PrefEnabled(JSContext* aCx, JSObject* aObj)
-{
-  using mozilla::dom::workers::WorkerPrivate;
-  using mozilla::dom::workers::GetWorkerPrivateFromContext;
-
-  // If we're on the main thread, then check the pref directly.
-  if (NS_IsMainThread()) {
-    bool enabled = false;
-    Preferences::GetBool("dom.caches.enabled", &enabled);
-    return enabled;
-  }
-
-  // Otherwise check the pref via the work private helper
-  WorkerPrivate* workerPrivate = GetWorkerPrivateFromContext(aCx);
-  if (!workerPrivate) {
-    return false;
-  }
-
-  return workerPrivate->DOMCachesEnabled();
-}
-
 nsISupports*
 Cache::GetParentObject() const
 {
diff --git a/dom/cache/Cache.h b/dom/cache/Cache.h
index 5148faacfc08..2af7a4c6794e 100644
--- a/dom/cache/Cache.h
+++ b/dom/cache/Cache.h
@@ -68,8 +68,6 @@ public:
        const CacheQueryOptions& aParams, ErrorResult& aRv);
 
   // binding methods
-  static bool PrefEnabled(JSContext* aCx, JSObject* aObj);
-
   nsISupports* GetParentObject() const;
   virtual JSObject* WrapObject(JSContext* aContext, JS::Handle<JSObject*> aGivenProto) override;
 
diff --git a/dom/cache/CacheStorage.cpp b/dom/cache/CacheStorage.cpp
index b86a26cd7200..3cc1b64df609 100644
--- a/dom/cache/CacheStorage.cpp
+++ b/dom/cache/CacheStorage.cpp
@@ -444,13 +444,6 @@ CacheStorage::Keys(ErrorResult& aRv)
   return promise.forget();
 }
 
-// static
-bool
-CacheStorage::PrefEnabled(JSContext* aCx, JSObject* aObj)
-{
-  return Cache::PrefEnabled(aCx, aObj);
-}
-
 // static
 already_AddRefed<CacheStorage>
 CacheStorage::Constructor(const GlobalObject& aGlobal,
diff --git a/dom/cache/CacheStorage.h b/dom/cache/CacheStorage.h
index 2ba60dcd769a..ef7b4145dc6b 100644
--- a/dom/cache/CacheStorage.h
+++ b/dom/cache/CacheStorage.h
@@ -73,8 +73,6 @@ public:
               nsIPrincipal* aPrincipal, ErrorResult& aRv);
 
   // binding methods
-  static bool PrefEnabled(JSContext* aCx, JSObject* aObj);
-
   nsISupports* GetParentObject() const;
   virtual JSObject* WrapObject(JSContext* aContext, JS::Handle<JSObject*> aGivenProto) override;
 
diff --git a/dom/webidl/Cache.webidl b/dom/webidl/Cache.webidl
index ed2cb88739f2..fed193510758 100644
--- a/dom/webidl/Cache.webidl
+++ b/dom/webidl/Cache.webidl
@@ -11,7 +11,7 @@
 // https://slightlyoff.github.io/ServiceWorker/spec/service_worker/index.html#cache
 
 [Exposed=(Window,Worker),
- Func="mozilla::dom::cache::Cache::PrefEnabled"]
+ Func="mozilla::dom::DOMPreferences::DOMCachesEnabled"]
 interface Cache {
   [NewObject]
   Promise<Response> match(RequestInfo request, optional CacheQueryOptions options);
diff --git a/dom/webidl/CacheStorage.webidl b/dom/webidl/CacheStorage.webidl
index cf5bad44b201..8c9afd493e25 100644
--- a/dom/webidl/CacheStorage.webidl
+++ b/dom/webidl/CacheStorage.webidl
@@ -14,7 +14,7 @@ interface Principal;
 
 [Exposed=(Window,Worker),
  ChromeConstructor(CacheStorageNamespace namespace, Principal principal),
- Func="mozilla::dom::cache::CacheStorage::PrefEnabled"]
+ Func="mozilla::dom::DOMPreferences::DOMCachesEnabled"]
 interface CacheStorage {
   [NewObject]
   Promise<Response> match(RequestInfo request, optional CacheQueryOptions options);
diff --git a/dom/webidl/WindowOrWorkerGlobalScope.webidl b/dom/webidl/WindowOrWorkerGlobalScope.webidl
index 1b6637b630bf..63c38c48c1ab 100644
--- a/dom/webidl/WindowOrWorkerGlobalScope.webidl
+++ b/dom/webidl/WindowOrWorkerGlobalScope.webidl
@@ -62,7 +62,7 @@ partial interface WindowOrWorkerGlobalScope {
 
 // https://w3c.github.io/ServiceWorker/#self-caches
 partial interface WindowOrWorkerGlobalScope {
-  [Throws, Func="mozilla::dom::cache::CacheStorage::PrefEnabled", SameObject]
+  [Throws, Func="mozilla::dom::DOMPreferences::DOMCachesEnabled", SameObject]
   readonly attribute CacheStorage caches;
 };
 
diff --git a/dom/workers/WorkerPrefs.h b/dom/workers/WorkerPrefs.h
index c71ac059ef3d..34b8f1ce8ed4 100644
--- a/dom/workers/WorkerPrefs.h
+++ b/dom/workers/WorkerPrefs.h
@@ -21,7 +21,6 @@
 //   * First argument is the name of the pref.
 //   * The name of the function that updates the new value of a pref.
 
-WORKER_SIMPLE_PREF("dom.caches.enabled", DOMCachesEnabled, DOM_CACHES)
 WORKER_SIMPLE_PREF("dom.caches.testing.enabled", DOMCachesTestingEnabled, DOM_CACHES_TESTING)
 WORKER_SIMPLE_PREF("dom.performance.enable_user_timing_logging", PerformanceLoggingEnabled, PERFORMANCE_LOGGING_ENABLED)
 WORKER_SIMPLE_PREF("dom.webnotifications.enabled", DOMWorkerNotificationEnabled, DOM_WORKERNOTIFICATION)