diff --git a/toolkit/xre/nsAppRunner.cpp b/toolkit/xre/nsAppRunner.cpp
index 05d8ef7ea4db..0887683082dc 100644
--- a/toolkit/xre/nsAppRunner.cpp
+++ b/toolkit/xre/nsAppRunner.cpp
@@ -676,10 +676,26 @@ SetUpSandboxEnvironment()
   }
 }
 
-#if defined(NIGHTLY_BUILD)
 static void
-CleanUpOldSandboxEnvironment()
+CleanUpSandboxEnvironment()
 {
+  // We can't have created a low integrity temp before Vista.
+  if (!IsVistaOrLater()) {
+    return;
+  }
+
+  // Get temp directory suffix pref.
+  nsAdoptingString tempDirSuffix =
+    Preferences::GetString("security.sandbox.content.tempDirSuffix");
+  if (tempDirSuffix.IsEmpty()) {
+    return;
+  }
+
+  // Get and remove the low integrity Mozilla temp directory.
+  // This function already warns if the deletion fails.
+  unused << GetAndCleanLowIntegrityTemp(tempDirSuffix);
+
+#if defined(NIGHTLY_BUILD)
   // Temporary code to clean up the old low integrity temp directories.
   // The removal of this is tracked by bug 1165818.
   nsCOMPtr<nsIFile> lowIntegrityMozilla;
@@ -718,31 +734,7 @@ CleanUpOldSandboxEnvironment()
       file->Remove(/* aRecursive */ true);
     }
   }
-}
 #endif
-
-static void
-CleanUpSandboxEnvironment()
-{
-  // We can't have created a low integrity temp before Vista.
-  if (!IsVistaOrLater()) {
-    return;
-  }
-
-#if defined(NIGHTLY_BUILD)
-  CleanUpOldSandboxEnvironment();
-#endif
-
-  // Get temp directory suffix pref.
-  nsAdoptingString tempDirSuffix =
-    Preferences::GetString("security.sandbox.content.tempDirSuffix");
-  if (tempDirSuffix.IsEmpty()) {
-    return;
-  }
-
-  // Get and remove the low integrity Mozilla temp directory.
-  // This function already warns if the deletion fails.
-  nsCOMPtr<nsIFile> lowIntegrityTemp = GetAndCleanLowIntegrityTemp(tempDirSuffix);
 }
 #endif