diff --git a/dom/base/nsContentUtils.cpp b/dom/base/nsContentUtils.cpp
index 6465f3789dd3..d306e6cd1dab 100644
--- a/dom/base/nsContentUtils.cpp
+++ b/dom/base/nsContentUtils.cpp
@@ -10999,3 +10999,20 @@ nsContentUtils::ContentIsLink(nsIContent* aContent)
                       aContent->AttrValueIs(kNameSpaceID_XLink, nsGkAtoms::type,
                                             nsGkAtoms::simple, eCaseMatters));
 }
+
+/* static */ already_AddRefed<EventTarget>
+nsContentUtils::TryGetTabChildGlobalAsEventTarget(nsISupports* aFrom)
+{
+  nsCOMPtr<nsIFrameLoaderOwner> frameLoaderOwner = do_QueryInterface(aFrom);
+  if (!frameLoaderOwner) {
+    return nullptr;
+  }
+
+  RefPtr<nsFrameLoader> frameLoader = frameLoaderOwner->GetFrameLoader();
+  if (!frameLoader) {
+    return nullptr;
+  }
+
+  nsCOMPtr<EventTarget> target = frameLoader->GetTabChildGlobalAsEventTarget();
+  return target.forget();
+}
diff --git a/dom/base/nsContentUtils.h b/dom/base/nsContentUtils.h
index 292729a55310..c24e5d269be1 100644
--- a/dom/base/nsContentUtils.h
+++ b/dom/base/nsContentUtils.h
@@ -3250,6 +3250,9 @@ public:
 
   static bool ContentIsLink(nsIContent* aContent);
 
+  static already_AddRefed<mozilla::dom::EventTarget>
+  TryGetTabChildGlobalAsEventTarget(nsISupports* aFrom);
+
 private:
   static bool InitializeEventTable();
 
diff --git a/dom/base/nsGlobalWindow.cpp b/dom/base/nsGlobalWindow.cpp
index 0a8fb735e460..2d25bd1adc6e 100644
--- a/dom/base/nsGlobalWindow.cpp
+++ b/dom/base/nsGlobalWindow.cpp
@@ -528,24 +528,6 @@ CreateNativeGlobalForInner(JSContext* aCx,
   return NS_OK;
 }
 
-static
-already_AddRefed<EventTarget>
-TryGetTabChildGlobalAsEventTarget(nsISupports *aFrom)
-{
-  nsCOMPtr<nsIFrameLoaderOwner> frameLoaderOwner = do_QueryInterface(aFrom);
-  if (!frameLoaderOwner) {
-    return nullptr;
-  }
-
-  RefPtr<nsFrameLoader> frameLoader = frameLoaderOwner->GetFrameLoader();
-  if (!frameLoader) {
-    return nullptr;
-  }
-
-  nsCOMPtr<EventTarget> target = frameLoader->GetTabChildGlobalAsEventTarget();
-  return target.forget();
-}
-
 template <class T>
 nsIURI*
 nsPIDOMWindow<T>::GetDocumentURI() const
diff --git a/dom/base/nsGlobalWindowInner.cpp b/dom/base/nsGlobalWindowInner.cpp
index 563404394c91..9968be81a4d2 100644
--- a/dom/base/nsGlobalWindowInner.cpp
+++ b/dom/base/nsGlobalWindowInner.cpp
@@ -1629,18 +1629,20 @@ nsGlobalWindowInner::UpdateParentTarget()
 
   nsCOMPtr<Element> frameElement = GetOuterWindow()->GetFrameElementInternal();
   nsCOMPtr<EventTarget> eventTarget =
-    TryGetTabChildGlobalAsEventTarget(frameElement);
+    nsContentUtils::TryGetTabChildGlobalAsEventTarget(frameElement);
 
   if (!eventTarget) {
     nsGlobalWindowOuter* topWin = GetScriptableTopInternal();
     if (topWin) {
       frameElement = topWin->AsOuter()->GetFrameElementInternal();
-      eventTarget = TryGetTabChildGlobalAsEventTarget(frameElement);
+      eventTarget =
+        nsContentUtils::TryGetTabChildGlobalAsEventTarget(frameElement);
     }
   }
 
   if (!eventTarget) {
-    eventTarget = TryGetTabChildGlobalAsEventTarget(mChromeEventHandler);
+    eventTarget =
+      nsContentUtils::TryGetTabChildGlobalAsEventTarget(mChromeEventHandler);
   }
 
   if (!eventTarget) {
diff --git a/dom/base/nsGlobalWindowOuter.cpp b/dom/base/nsGlobalWindowOuter.cpp
index c4d55a748bf5..92e6859f4856 100644
--- a/dom/base/nsGlobalWindowOuter.cpp
+++ b/dom/base/nsGlobalWindowOuter.cpp
@@ -2240,18 +2240,20 @@ nsGlobalWindowOuter::UpdateParentTarget()
 
   nsCOMPtr<Element> frameElement = GetOuterWindow()->GetFrameElementInternal();
   nsCOMPtr<EventTarget> eventTarget =
-    TryGetTabChildGlobalAsEventTarget(frameElement);
+    nsContentUtils::TryGetTabChildGlobalAsEventTarget(frameElement);
 
   if (!eventTarget) {
     nsGlobalWindowOuter* topWin = GetScriptableTopInternal();
     if (topWin) {
       frameElement = topWin->GetFrameElementInternal();
-      eventTarget = TryGetTabChildGlobalAsEventTarget(frameElement);
+      eventTarget =
+        nsContentUtils::TryGetTabChildGlobalAsEventTarget(frameElement);
     }
   }
 
   if (!eventTarget) {
-    eventTarget = TryGetTabChildGlobalAsEventTarget(mChromeEventHandler);
+    eventTarget =
+      nsContentUtils::TryGetTabChildGlobalAsEventTarget(mChromeEventHandler);
   }
 
   if (!eventTarget) {