diff --git a/ipc/mscom/Interceptor.cpp b/ipc/mscom/Interceptor.cpp
index ac49d9222a83..6bedd5f7c57e 100644
--- a/ipc/mscom/Interceptor.cpp
+++ b/ipc/mscom/Interceptor.cpp
@@ -25,31 +25,32 @@ namespace mscom {
 
 /* static */ HRESULT
 Interceptor::Create(STAUniquePtr<IUnknown> aTarget, IInterceptorSink* aSink,
-                    REFIID aInitialIid, void** aOutInterface)
+                    REFIID aIid, void** aOutput)
 {
-  MOZ_ASSERT(aOutInterface && aTarget && aSink);
-  if (!aOutInterface) {
+  MOZ_ASSERT(aOutput && aTarget && aSink);
+  if (!aOutput) {
     return E_INVALIDARG;
   }
 
-  *aOutInterface = nullptr;
+  *aOutput = nullptr;
 
   if (!aTarget || !aSink) {
     return E_INVALIDARG;
   }
 
-  RefPtr<Interceptor> intcpt(new Interceptor(aSink));
-  return intcpt->GetInitialInterceptorForIID(aInitialIid, Move(aTarget),
-                                             aOutInterface);
+  RefPtr<WeakReferenceSupport> intcpt(new Interceptor(Move(aTarget), aSink));
+  return intcpt->QueryInterface(aIid, aOutput);
 }
 
-Interceptor::Interceptor(IInterceptorSink* aSink)
+Interceptor::Interceptor(STAUniquePtr<IUnknown> aTarget, IInterceptorSink* aSink)
   : WeakReferenceSupport(WeakReferenceSupport::Flags::eDestroyOnMainThread)
+  , mTarget(Move(aTarget))
   , mEventSink(aSink)
   , mMutex("mozilla::mscom::Interceptor::mMutex")
   , mStdMarshal(nullptr)
 {
   MOZ_ASSERT(aSink);
+  MOZ_ASSERT(!IsProxy(mTarget.get()));
   RefPtr<IWeakReference> weakRef;
   if (SUCCEEDED(GetWeakReference(getter_AddRefs(weakRef)))) {
     aSink->SetInterceptor(weakRef);
@@ -204,55 +205,6 @@ Interceptor::CreateInterceptor(REFIID aIid, IUnknown* aOuter, IUnknown** aOutput
   return hr;
 }
 
-HRESULT
-Interceptor::GetInitialInterceptorForIID(REFIID aTargetIid,
-                                         STAUniquePtr<IUnknown> aTarget,
-                                         void** aOutInterceptor)
-{
-  MOZ_ASSERT(aOutInterceptor);
-  MOZ_ASSERT(aTargetIid != IID_IUnknown && aTargetIid != IID_IMarshal);
-  MOZ_ASSERT(!IsProxy(aTarget.get()));
-
-  // Raise the refcount for stabilization purposes during aggregation
-  RefPtr<IUnknown> kungFuDeathGrip(static_cast<IUnknown*>(
-        static_cast<WeakReferenceSupport*>(this)));
-
-  RefPtr<IUnknown> unkInterceptor;
-  HRESULT hr = CreateInterceptor(aTargetIid, kungFuDeathGrip,
-                                 getter_AddRefs(unkInterceptor));
-  if (FAILED(hr)) {
-    return hr;
-  }
-
-  RefPtr<ICallInterceptor> interceptor;
-  hr = unkInterceptor->QueryInterface(IID_ICallInterceptor,
-                                      getter_AddRefs(interceptor));
-  if (FAILED(hr)) {
-    return hr;
-  }
-
-  hr = interceptor->RegisterSink(mEventSink);
-  if (FAILED(hr)) {
-    return hr;
-  }
-
-  // mTarget is a weak reference to aTarget. This is safe because we transfer
-  // ownership of aTarget into mInterceptorMap which remains live for the
-  // lifetime of this Interceptor.
-  mTarget = ToInterceptorTargetPtr(aTarget);
-
-  // Now we transfer aTarget's ownership into mInterceptorMap.
-  mInterceptorMap.AppendElement(MapEntry(aTargetIid,
-                                         unkInterceptor,
-                                         aTarget.release()));
-
-  if (mEventSink->MarshalAs(aTargetIid) == aTargetIid) {
-    return unkInterceptor->QueryInterface(aTargetIid, aOutInterceptor);
-  }
-
-  return GetInterceptorForIID(aTargetIid, aOutInterceptor);
-}
-
 /**
  * This method contains the core guts of the handling of QueryInterface calls
  * that are delegated to us from the ICallInterceptor.
diff --git a/ipc/mscom/Interceptor.h b/ipc/mscom/Interceptor.h
index 69b188ffcce3..298c625ab331 100644
--- a/ipc/mscom/Interceptor.h
+++ b/ipc/mscom/Interceptor.h
@@ -67,7 +67,7 @@ class Interceptor final : public WeakReferenceSupport
 {
 public:
   static HRESULT Create(STAUniquePtr<IUnknown> aTarget, IInterceptorSink* aSink,
-                        REFIID aInitialIid, void** aOutInterface);
+                        REFIID aIid, void** aOutput);
 
   // IUnknown
   STDMETHODIMP QueryInterface(REFIID riid, void** ppv) override;
@@ -112,11 +112,8 @@ private:
   };
 
 private:
-  explicit Interceptor(IInterceptorSink* aSink);
+  Interceptor(STAUniquePtr<IUnknown> aTarget, IInterceptorSink* aSink);
   ~Interceptor();
-  HRESULT GetInitialInterceptorForIID(REFIID aTargetIid,
-                                      STAUniquePtr<IUnknown> aTarget,
-                                      void** aOutInterface);
   MapEntry* Lookup(REFIID aIid);
   HRESULT QueryInterfaceTarget(REFIID aIid, void** aOutput);
   HRESULT ThreadSafeQueryInterface(REFIID aIid,
@@ -124,7 +121,7 @@ private:
   HRESULT CreateInterceptor(REFIID aIid, IUnknown* aOuter, IUnknown** aOutput);
 
 private:
-  InterceptorTargetPtr<IUnknown>  mTarget;
+  STAUniquePtr<IUnknown>    mTarget;
   RefPtr<IInterceptorSink>  mEventSink;
   mozilla::Mutex            mMutex; // Guards mInterceptorMap
   // Using a nsTArray since the # of interfaces is not going to be very high