diff --git a/dom/ipc/ProcessPriorityManager.cpp b/dom/ipc/ProcessPriorityManager.cpp
index 90e630313df6..f4c3ee5b399a 100644
--- a/dom/ipc/ProcessPriorityManager.cpp
+++ b/dom/ipc/ProcessPriorityManager.cpp
@@ -1045,7 +1045,9 @@ ParticularProcessPriorityManager::ShutDown()
     mResetPriorityTimer = nullptr;
   }
 
-  ProcessPriorityManager::RemoveFromBackgroundLRUPool(mContentParent);
+  if (mPriority == PROCESS_PRIORITY_BACKGROUND && !IsPreallocated()) {
+    ProcessPriorityManager::RemoveFromBackgroundLRUPool(mContentParent);
+  }
 
   mContentParent = nullptr;
 }