1 files changed, 25 insertions, 0 deletions
diff --git a/dom/webidl/ExtensionEventManager.webidl b/dom/webidl/ExtensionEventManager.webidl
new file mode 100644
index 0000000000..0aef320d95
--- /dev/null
+++ b/dom/webidl/ExtensionEventManager.webidl
@@ -0,0 +1,25 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/.
+ *
+ * This IDL file is related to the WebExtensions API object.
+ *
+ * You are granted a license to use, reproduce and create derivative works of
+ * this document.
+ */
+
+[Exposed=(ServiceWorker), LegacyNoInterfaceObject]
+interface ExtensionEventManager {
+  [Throws]
+  undefined addListener(Function callback, optional object listenerOptions);
+
+  [Throws]
+  undefined removeListener(Function callback);
+
+  [Throws]
+  boolean hasListener(Function callback);
+
+  [Throws]
+  boolean hasListeners();
+};