diff --git a/dom/base/CustomElementRegistry.cpp b/dom/base/CustomElementRegistry.cpp
index 4511842d7905..5f7be03e652e 100644
--- a/dom/base/CustomElementRegistry.cpp
+++ b/dom/base/CustomElementRegistry.cpp
@@ -159,9 +159,9 @@ CustomElementCallback::CustomElementCallback(
 // CustomElementConstructor
 
 already_AddRefed<Element> CustomElementConstructor::Construct(
-    const char* aExecutionReason, ErrorResult& aRv) {
-  CallSetup s(this, aRv, aExecutionReason,
-              CallbackFunction::eRethrowExceptions);
+    ErrorResult& aRv, const char* aExecutionReason,
+    ExceptionHandling aExceptionHandling) {
+  CallSetup s(this, aRv, aExecutionReason, aExceptionHandling);
 
   JSContext* cx = s.GetContext();
   if (!cx) {
@@ -1068,8 +1068,8 @@ static void DoUpgrade(Element* aElement, CustomElementConstructor* aConstructor,
                       ErrorResult& aRv) {
   // Rethrow the exception since it might actually throw the exception from the
   // upgrade steps back out to the caller of document.createElement.
-  RefPtr<Element> constructResult =
-      aConstructor->Construct("Custom Element Upgrade", aRv);
+  RefPtr<Element> constructResult = aConstructor->Construct(
+      aRv, "Custom Element Upgrade", CallbackFunction::eRethrowExceptions);
   if (aRv.Failed()) {
     return;
   }
diff --git a/dom/base/CustomElementRegistry.h b/dom/base/CustomElementRegistry.h
index a95ba2f258ea..1b25aadf56bd 100644
--- a/dom/base/CustomElementRegistry.h
+++ b/dom/base/CustomElementRegistry.h
@@ -87,8 +87,9 @@ class CustomElementConstructor final : public CallbackFunction {
     MOZ_ASSERT(JS::IsConstructor(mCallback));
   }
 
-  already_AddRefed<Element> Construct(const char* aExecutionReason,
-                                      ErrorResult& aRv);
+  already_AddRefed<Element> Construct(
+      ErrorResult& aRv, const char* aExecutionReason = nullptr,
+      ExceptionHandling aExceptionHandling = eReportExceptions);
 };
 
 // Each custom element has an associated callback queue and an element is
diff --git a/dom/base/nsContentUtils.cpp b/dom/base/nsContentUtils.cpp
index 65ad938e9bf3..3c96cb45bc88 100644
--- a/dom/base/nsContentUtils.cpp
+++ b/dom/base/nsContentUtils.cpp
@@ -9457,8 +9457,8 @@ static void DoCustomElementCreate(Element** aElement, Document* aDoc,
                                   NodeInfo* aNodeInfo,
                                   CustomElementConstructor* aConstructor,
                                   ErrorResult& aRv) {
-  RefPtr<Element> element =
-      aConstructor->Construct("Custom Element Create", aRv);
+  RefPtr<Element> element = aConstructor->Construct(
+      aRv, "Custom Element Create", CallbackFunction::eRethrowExceptions);
   if (aRv.Failed()) {
     return;
   }