diff --git a/dom/localstorage/ActorsParent.cpp b/dom/localstorage/ActorsParent.cpp
index 506976e51ae4..a45f619a61cc 100644
--- a/dom/localstorage/ActorsParent.cpp
+++ b/dom/localstorage/ActorsParent.cpp
@@ -961,22 +961,23 @@ Result<bool, nsresult> ExistsAsFile(nsIFile& aFile) {
 
   // This is an optimization to check both properties in one OS case, rather
   // than calling Exists first, and then IsDirectory. IsDirectory also checks if
-  // the path exists.
+  // the path exists. QM_OR_ELSE_WARN is not used here since we want to ignore
+  // NS_ERROR_FILE_NOT_FOUND/NS_ERROR_FILE_TARGET_DOES_NOT_EXIST completely.
   LS_TRY_INSPECT(
       const auto& res,
-      QM_OR_ELSE_WARN(
-          MOZ_TO_RESULT_INVOKE(aFile, IsDirectory)
-              .map([](const bool isDirectory) {
-                return isDirectory ? ExistsAsFileResult::IsDirectory
-                                   : ExistsAsFileResult::IsFile;
-              }),
-          ([](const nsresult rv) -> Result<ExistsAsFileResult, nsresult> {
-            if (rv != NS_ERROR_FILE_NOT_FOUND &&
-                rv != NS_ERROR_FILE_TARGET_DOES_NOT_EXIST) {
-              return Err(rv);
-            }
-            return ExistsAsFileResult::DoesNotExist;
-          })));
+      MOZ_TO_RESULT_INVOKE(aFile, IsDirectory)
+          .map([](const bool isDirectory) {
+            return isDirectory ? ExistsAsFileResult::IsDirectory
+                               : ExistsAsFileResult::IsFile;
+          })
+          .orElse(
+              [](const nsresult rv) -> Result<ExistsAsFileResult, nsresult> {
+                if (rv != NS_ERROR_FILE_NOT_FOUND &&
+                    rv != NS_ERROR_FILE_TARGET_DOES_NOT_EXIST) {
+                  return Err(rv);
+                }
+                return ExistsAsFileResult::DoesNotExist;
+              }));
 
   LS_TRY(OkIf(res != ExistsAsFileResult::IsDirectory), Err(NS_ERROR_FAILURE));