diff --git a/dom/ipc/PreallocatedProcessManager.cpp b/dom/ipc/PreallocatedProcessManager.cpp
index d9f500b6d08f..85cbfdc267f4 100644
--- a/dom/ipc/PreallocatedProcessManager.cpp
+++ b/dom/ipc/PreallocatedProcessManager.cpp
@@ -60,7 +60,6 @@ public:
   void RunAfterPreallocatedProcessReady(nsIRunnable* aRunnable);
 
 private:
-  void OnNuwaForkTimeout();
   void NuwaFork();
 
   // initialization off the critical path of app startup.
@@ -69,7 +68,6 @@ private:
   // The array containing the preallocated processes. 4 as the inline storage size
   // should be enough so we don't need to grow the nsAutoTArray.
   nsAutoTArray<nsRefPtr<ContentParent>, 4> mSpareProcesses;
-  nsTArray<CancelableTask*> mNuwaForkWaitTasks;
 
   nsTArray<nsCOMPtr<nsIRunnable> > mDelayedContentParentRequests;
 
@@ -312,11 +310,6 @@ PreallocatedProcessManagerImpl::PublishSpareProcess(ContentParent* aContent)
       JS::NullHandleValue, JS::NullHandleValue, cx, 1);
   }
 
-  if (!mNuwaForkWaitTasks.IsEmpty()) {
-    mNuwaForkWaitTasks.ElementAt(0)->Cancel();
-    mNuwaForkWaitTasks.RemoveElementAt(0);
-  }
-
   mSpareProcesses.AppendElement(aContent);
 
   if (!mDelayedContentParentRequests.IsEmpty()) {
@@ -374,28 +367,9 @@ PreallocatedProcessManagerImpl::PreallocatedProcessReady()
 }
 
 
-void
-PreallocatedProcessManagerImpl::OnNuwaForkTimeout()
-{
-  if (!mNuwaForkWaitTasks.IsEmpty()) {
-    mNuwaForkWaitTasks.RemoveElementAt(0);
-  }
-
-  // We haven't RecvAddNewProcess() after NuwaFork(). Maybe the main
-  // thread of the Nuwa process is in deadlock.
-  MOZ_ASSERT(false, "Can't fork from the nuwa process.");
-}
-
 void
 PreallocatedProcessManagerImpl::NuwaFork()
 {
-  CancelableTask* nuwaForkTimeoutTask = NewRunnableMethod(
-    this, &PreallocatedProcessManagerImpl::OnNuwaForkTimeout);
-  mNuwaForkWaitTasks.AppendElement(nuwaForkTimeoutTask);
-
-  MessageLoop::current()->PostDelayedTask(FROM_HERE,
-                                          nuwaForkTimeoutTask,
-                                          NUWA_FORK_WAIT_DURATION_MS);
   mPreallocatedAppProcess->SendNuwaFork();
 }
 #endif