diff --git a/dom/interfaces/apps/mozIApplicationClearPrivateDataParams.idl b/dom/interfaces/apps/mozIApplicationClearPrivateDataParams.idl
new file mode 100644
index 000000000000..16d86e613ad8
--- /dev/null
+++ b/dom/interfaces/apps/mozIApplicationClearPrivateDataParams.idl
@@ -0,0 +1,15 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: sw=2 ts=8 et :
+ */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsISupports.idl"
+
+[scriptable, uuid(ba0e6c8e-8c03-4b9b-8f9b-4fb14216f56e)]
+interface mozIApplicationClearPrivateDataParams
+{
+  readonly attribute unsigned long appId;
+  readonly attribute boolean browserOnly;
+};