--- a/dom/cache/StreamList.cpp
+++ b/dom/cache/StreamList.cpp
@@ -128,17 +128,25 @@ void StreamList::Close(const nsID& aId) 
   if (mStreamControl) {
     mStreamControl->Close(aId);
   }
 }
 
 void StreamList::CloseAll() {
   NS_ASSERT_OWNINGTHREAD(StreamList);
   if (mStreamControl) {
-    mStreamControl->CloseAll();
+    auto streamControl = mStreamControl;
+    mStreamControl = nullptr;
+
+    streamControl->CloseAll();
+
+    mStreamControl = streamControl;
+    streamControl = nullptr;
+
+    mStreamControl->Shutdown();
   }
 }
 
 void StreamList::Cancel() {
   NS_ASSERT_OWNINGTHREAD(StreamList);
   CloseAll();
 }