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diff --git a/dom/webidl/AbortController.webidl b/dom/webidl/AbortController.webidl
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index 0000000000..2b172b7718
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+++ b/dom/webidl/AbortController.webidl
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+/* -*- 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/.
+ *
+ * The origin of this IDL file is
+ * https://dom.spec.whatwg.org/#abortcontroller
+ */
+
+[Exposed=(Window,Worker)]
+interface AbortController {
+  [Throws]
+  constructor();
+
+  [SameObject] readonly attribute AbortSignal signal;
+
+  undefined abort(optional any reason);
+};