diff --git a/dom/base/DOMPrefs.cpp b/dom/base/DOMPrefs.cpp
index f886a95fc2f5..8d0f65fca76a 100644
--- a/dom/base/DOMPrefs.cpp
+++ b/dom/base/DOMPrefs.cpp
@@ -44,6 +44,7 @@ PREF(NotificationRIEnabled, "dom.webnotifications.requireinteraction.enabled")
 PREF(ServiceWorkersEnabled, "dom.serviceWorkers.enabled")
 PREF(ServiceWorkersTestingEnabled, "dom.serviceWorkers.testing.enabled")
 PREF(StorageManagerEnabled, "dom.storageManager.enabled")
+PREF(PromiseRejectionEventsEnabled, "dom.promise_rejection_events.enabled")
 
 #undef PREF
 
@@ -60,6 +61,7 @@ PREF_WEBIDL(NotificationEnabledInServiceWorkers)
 PREF_WEBIDL(NotificationRIEnabled)
 PREF_WEBIDL(ServiceWorkersEnabled)
 PREF_WEBIDL(StorageManagerEnabled)
+PREF_WEBIDL(PromiseRejectionEventsEnabled)
 
 #undef PREF_WEBIDL
 
diff --git a/dom/base/DOMPrefs.h b/dom/base/DOMPrefs.h
index 8e5df53393e1..8eb8f4e2145f 100644
--- a/dom/base/DOMPrefs.h
+++ b/dom/base/DOMPrefs.h
@@ -55,6 +55,10 @@ public:
   // Returns true if the dom.storageManager.enabled pref is set.
   static bool StorageManagerEnabled();
   static bool StorageManagerEnabled(JSContext* aCx, JSObject* aObj);
+
+  // Returns true if the dom.promise_rejection_events.enabled pref is set.
+  static bool PromiseRejectionEventsEnabled();
+  static bool PromiseRejectionEventsEnabled(JSContext* aCx, JSObject* aObj);
 };
 
 } // dom namespace
diff --git a/dom/base/nsContentUtils.cpp b/dom/base/nsContentUtils.cpp
index c2fb6359db1c..75af9eb4f0ef 100644
--- a/dom/base/nsContentUtils.cpp
+++ b/dom/base/nsContentUtils.cpp
@@ -8885,25 +8885,6 @@ nsContentUtils::GetReferrerPolicyFromHeader(const nsAString& aHeader)
   return referrerPolicy;
 }
 
-// static
-bool
-nsContentUtils::PromiseRejectionEventsEnabled(JSContext* aCx, JSObject* aObj)
-{
-  if (NS_IsMainThread()) {
-    return Preferences::GetBool("dom.promise_rejection_events.enabled", false);
-  }
-
-  using namespace workers;
-
-  // Otherwise, check the pref via the WorkerPrivate
-  WorkerPrivate* workerPrivate = GetWorkerPrivateFromContext(aCx);
-  if (!workerPrivate) {
-    return false;
-  }
-
-  return workerPrivate->PromiseRejectionEventsEnabled();
-}
-
 // static
 bool
 nsContentUtils::PushEnabled(JSContext* aCx, JSObject* aObj)
diff --git a/dom/base/nsContentUtils.h b/dom/base/nsContentUtils.h
index 391f1474c949..cb7e7235053e 100644
--- a/dom/base/nsContentUtils.h
+++ b/dom/base/nsContentUtils.h
@@ -2911,8 +2911,6 @@ public:
    */
   static mozilla::net::ReferrerPolicy GetReferrerPolicyFromHeader(const nsAString& aHeader);
 
-  static bool PromiseRejectionEventsEnabled(JSContext* aCx, JSObject* aObj);
-
   static bool PushEnabled(JSContext* aCx, JSObject* aObj);
 
   static bool StreamsEnabled(JSContext* aCx, JSObject* aObj);
diff --git a/dom/webidl/PromiseRejectionEvent.webidl b/dom/webidl/PromiseRejectionEvent.webidl
index 21faf8bd09d0..a341794cf916 100644
--- a/dom/webidl/PromiseRejectionEvent.webidl
+++ b/dom/webidl/PromiseRejectionEvent.webidl
@@ -6,7 +6,7 @@
 
 [Constructor(DOMString type, PromiseRejectionEventInit eventInitDict),
  Exposed=(Window,Worker),
- Func="nsContentUtils::PromiseRejectionEventsEnabled"]
+ Func="mozilla::dom::DOMPrefs::PromiseRejectionEventsEnabled"]
 interface PromiseRejectionEvent : Event
 {
   [BinaryName="rejectedPromise"]
diff --git a/dom/workers/WorkerPrefs.h b/dom/workers/WorkerPrefs.h
index 99085bb39ce6..7b87e157b556 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.promise_rejection_events.enabled", PromiseRejectionEventsEnabled, PROMISE_REJECTION_EVENTS_ENABLED)
 WORKER_SIMPLE_PREF("dom.push.enabled", PushEnabled, PUSH_ENABLED)
 WORKER_SIMPLE_PREF("dom.streams.enabled", StreamsEnabled, STREAMS_ENABLED)
 WORKER_SIMPLE_PREF("dom.requestcontext.enabled", RequestContextEnabled, REQUESTCONTEXT_ENABLED)