diff --git a/dom/base/DOMPrefs.cpp b/dom/base/DOMPrefs.cpp
index fcedc5790c61..fb590fa482e8 100644
--- a/dom/base/DOMPrefs.cpp
+++ b/dom/base/DOMPrefs.cpp
@@ -41,6 +41,7 @@ PREF(PerformanceLoggingEnabled, "dom.performance.enable_user_timing_logging")
 PREF(NotificationEnabled, "dom.webnotifications.enabled")
 PREF(NotificationEnabledInServiceWorkers, "dom.webnotifications.serviceworker.enabled")
 PREF(NotificationRIEnabled, "dom.webnotifications.requireinteraction.enabled")
+PREF(ServiceWorkersEnabled, "dom.serviceWorkers.enabled")
 
 #undef PREF
 
@@ -55,6 +56,7 @@ PREF_WEBIDL(ImageBitmapExtensionsEnabled)
 PREF_WEBIDL(DOMCachesEnabled)
 PREF_WEBIDL(NotificationEnabledInServiceWorkers)
 PREF_WEBIDL(NotificationRIEnabled)
+PREF_WEBIDL(ServiceWorkersEnabled)
 
 #undef PREF_WEBIDL
 
diff --git a/dom/base/DOMPrefs.h b/dom/base/DOMPrefs.h
index 2ea348c4edbc..406da722a5d4 100644
--- a/dom/base/DOMPrefs.h
+++ b/dom/base/DOMPrefs.h
@@ -44,6 +44,10 @@ public:
   // set.
   static bool NotificationRIEnabled();
   static bool NotificationRIEnabled(JSContext* aCx, JSObject* aObj);
+
+  // Returns true if the dom.serviceWorkers.enabled pref is set.
+  static bool ServiceWorkersEnabled();
+  static bool ServiceWorkersEnabled(JSContext* aCx, JSObject* aObj);
 };
 
 } // dom namespace
diff --git a/dom/ipc/TabContext.cpp b/dom/ipc/TabContext.cpp
index 8a6d462ab6ea..43724baa1b65 100644
--- a/dom/ipc/TabContext.cpp
+++ b/dom/ipc/TabContext.cpp
@@ -8,6 +8,7 @@
 #include "mozilla/dom/PTabContext.h"
 #include "mozilla/dom/TabParent.h"
 #include "mozilla/dom/TabChild.h"
+#include "mozilla/dom/DOMPrefs.h"
 #include "nsIScriptSecurityManager.h"
 #include "nsServiceManagerUtils.h"
 
@@ -246,7 +247,7 @@ MaybeInvalidTabContext::MaybeInvalidTabContext(const IPCTabContext& aParams)
       // It is meant as a temporary solution until service workers can
       // provide a TabChild equivalent. Don't allow this on b2g since
       // it might be used to escalate privileges.
-      if (!Preferences::GetBool("dom.serviceWorkers.enabled", false)) {
+      if (!DOMPrefs::ServiceWorkersEnabled()) {
         mInvalidReason = "ServiceWorkers should be enabled.";
         return;
       }
diff --git a/dom/webidl/ServiceWorkerRegistration.webidl b/dom/webidl/ServiceWorkerRegistration.webidl
index c5bfcf28d166..6794e2da8401 100644
--- a/dom/webidl/ServiceWorkerRegistration.webidl
+++ b/dom/webidl/ServiceWorkerRegistration.webidl
@@ -9,7 +9,7 @@
  * https://notifications.spec.whatwg.org/
  */
 
-[Func="mozilla::dom::ServiceWorkerRegistration::Visible",
+[Func="mozilla::dom::DOMPrefs::ServiceWorkersEnabled",
  Exposed=(Window,Worker)]
 interface ServiceWorkerRegistration : EventTarget {
   [Unforgeable] readonly attribute ServiceWorker? installing;
diff --git a/dom/workers/ServiceWorker.cpp b/dom/workers/ServiceWorker.cpp
index 793de9cf8362..8ebbb614d0c3 100644
--- a/dom/workers/ServiceWorker.cpp
+++ b/dom/workers/ServiceWorker.cpp
@@ -12,7 +12,7 @@
 #include "ServiceWorkerPrivate.h"
 #include "WorkerPrivate.h"
 
-#include "mozilla/Preferences.h"
+#include "mozilla/dom/DOMPrefs.h"
 #include "mozilla/dom/ClientIPCTypes.h"
 #include "mozilla/dom/ClientState.h"
 #include "mozilla/dom/Promise.h"
@@ -33,7 +33,7 @@ bool
 ServiceWorkerVisible(JSContext* aCx, JSObject* aObj)
 {
   if (NS_IsMainThread()) {
-    return Preferences::GetBool("dom.serviceWorkers.enabled", false);
+    return DOMPrefs::ServiceWorkersEnabled();
   }
 
   return IS_INSTANCE_OF(ServiceWorkerGlobalScope, aObj);
diff --git a/dom/workers/ServiceWorkerContainer.cpp b/dom/workers/ServiceWorkerContainer.cpp
index 82b6623d2a9d..eaac4691ddf3 100644
--- a/dom/workers/ServiceWorkerContainer.cpp
+++ b/dom/workers/ServiceWorkerContainer.cpp
@@ -12,12 +12,12 @@
 #include "nsIURL.h"
 #include "nsNetUtil.h"
 #include "nsPIDOMWindow.h"
-#include "mozilla/Preferences.h"
 #include "mozilla/Services.h"
 
 #include "nsCycleCollectionParticipant.h"
 #include "nsServiceManagerUtils.h"
 
+#include "mozilla/dom/DOMPrefs.h"
 #include "mozilla/dom/Navigator.h"
 #include "mozilla/dom/Promise.h"
 #include "mozilla/dom/ServiceWorkerContainerBinding.h"
@@ -53,7 +53,7 @@ ServiceWorkerContainer::IsEnabled(JSContext* aCx, JSObject* aGlobal)
     return false;
   }
 
-  return Preferences::GetBool("dom.serviceWorkers.enabled", false);
+  return DOMPrefs::ServiceWorkersEnabled();
 }
 
 ServiceWorkerContainer::ServiceWorkerContainer(nsPIDOMWindowInner* aWindow)
diff --git a/dom/workers/ServiceWorkerRegistration.cpp b/dom/workers/ServiceWorkerRegistration.cpp
index 2905f262c1bc..26848eb76093 100644
--- a/dom/workers/ServiceWorkerRegistration.cpp
+++ b/dom/workers/ServiceWorkerRegistration.cpp
@@ -7,6 +7,7 @@
 #include "ServiceWorkerRegistration.h"
 
 #include "ipc/ErrorIPCUtils.h"
+#include "mozilla/dom/DOMPrefs.h"
 #include "mozilla/dom/Notification.h"
 #include "mozilla/dom/Promise.h"
 #include "mozilla/dom/PromiseWindowProxy.h"
@@ -14,7 +15,6 @@
 #include "mozilla/dom/PushManagerBinding.h"
 #include "mozilla/dom/PushManager.h"
 #include "mozilla/dom/ServiceWorkerRegistrationBinding.h"
-#include "mozilla/Preferences.h"
 #include "mozilla/Services.h"
 #include "mozilla/Unused.h"
 #include "nsCycleCollectionParticipant.h"
@@ -38,22 +38,6 @@ using namespace mozilla::dom::workers;
 namespace mozilla {
 namespace dom {
 
-/* static */ bool
-ServiceWorkerRegistration::Visible(JSContext* aCx, JSObject* aObj)
-{
-  if (NS_IsMainThread()) {
-    return Preferences::GetBool("dom.serviceWorkers.enabled", false);
-  }
-
-  // Otherwise check the pref via the work private helper
-  WorkerPrivate* workerPrivate = GetWorkerPrivateFromContext(aCx);
-  if (!workerPrivate) {
-    return false;
-  }
-
-  return workerPrivate->ServiceWorkersEnabled();
-}
-
 ////////////////////////////////////////////////////
 // Main Thread implementation
 
diff --git a/dom/workers/ServiceWorkerRegistration.h b/dom/workers/ServiceWorkerRegistration.h
index 3728fdfe9657..20dfd8b771f1 100644
--- a/dom/workers/ServiceWorkerRegistration.h
+++ b/dom/workers/ServiceWorkerRegistration.h
@@ -61,9 +61,6 @@ public:
 
   IMPL_EVENT_HANDLER(updatefound)
 
-  static bool
-  Visible(JSContext* aCx, JSObject* aObj);
-
   static already_AddRefed<ServiceWorkerRegistration>
   CreateForMainThread(nsPIDOMWindowInner* aWindow,
                       const nsAString& aScope);
diff --git a/dom/workers/WorkerPrefs.h b/dom/workers/WorkerPrefs.h
index 4c35a20445e5..f25c94d22d6f 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.serviceWorkers.enabled", ServiceWorkersEnabled, SERVICEWORKERS_ENABLED)
 WORKER_SIMPLE_PREF("dom.serviceWorkers.testing.enabled", ServiceWorkersTestingEnabled, SERVICEWORKERS_TESTING_ENABLED)
 WORKER_SIMPLE_PREF("dom.storageManager.enabled", StorageManagerEnabled, STORAGEMANAGER_ENABLED)
 WORKER_SIMPLE_PREF("dom.promise_rejection_events.enabled", PromiseRejectionEventsEnabled, PROMISE_REJECTION_EVENTS_ENABLED)