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diff --git a/dom/interfaces/html/nsIMozBrowserFrame.idl b/dom/interfaces/html/nsIMozBrowserFrame.idl
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+++ b/dom/interfaces/html/nsIMozBrowserFrame.idl
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+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set tw=80 expandtab softtabstop=2 ts=2 sw=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/. */
+
+#include "nsIDOMMozBrowserFrame.idl"
+
+interface nsITabParent;
+
+[scriptable, builtinclass, uuid(0c0a862c-1a47-43c0-ae9e-d51835e3e1a6)]
+interface nsIMozBrowserFrame : nsIDOMMozBrowserFrame
+{
+  /**
+   * Gets whether this frame really is a browser or app frame.
+   *
+   * In order to really be a browser frame, this frame's
+   * nsIDOMMozBrowserFrame::mozbrowser attribute must be true, and the frame
+   * may have to pass various security checks.
+   */
+  [infallible] readonly attribute boolean reallyIsBrowserOrApp;
+
+  /**
+   * Gets whether this frame really is an app frame.
+   *
+   * In order to really be an app frame, this frame must really be a browser
+   * frame (this requirement will go away eventually), and  the frame's mozapp
+   * attribute must point to the manifest of a valid app.
+   */
+  [infallible] readonly attribute boolean reallyIsApp;
+
+  /**
+   * Gets whether this frame is an isolated frame.
+   *
+   * By default, browser frames are isolated, meaning they have a principal
+   * where OriginAttributes.mIsInIsolatedMozBrowser == true.  This isolates
+   * storage and other origin related items from non-browser apps, xul:browsers,
+   * etc.
+   *
+   * Isolation can be disabled by setting the frame's isolated attribute to
+   * false.  Disabling isolation is only allowed if the containing document has
+   * browser permission (or equivalent access).
+   */
+  [infallible] readonly attribute boolean isolated;
+
+  /**
+   * Gets this frame's app manifest URL, if the frame really is an app frame.
+   * Otherwise, returns the empty string.
+   *
+   * This method is guaranteed not to fail.
+   */
+  readonly attribute AString appManifestURL;
+
+  /**
+   * Normally, a frame tries to create its frame loader when its src is
+   * modified, or its contentWindow is accessed.
+   *
+   * disallowCreateFrameLoader prevents the frame element from creating its
+   * frame loader (in the same way that not being inside a document prevents the
+   * creation of a frame loader).  allowCreateFrameLoader lifts this restriction.
+   *
+   * These methods are not re-entrant -- it is an error to call
+   * disallowCreateFrameLoader twice without first calling allowFrameLoader.
+   *
+   * It's also an error to call either method if we already have a frame loader.
+   */
+  void disallowCreateFrameLoader();
+  void allowCreateFrameLoader();
+
+  /**
+   * Create a remote (i.e., out-of-process) frame loader attached to the given
+   * tab parent.
+   *
+   * It is an error to call this method if we already have a frame loader.
+   */
+  void createRemoteFrameLoader(in nsITabParent aTabParent);
+
+  /**
+   * Initialize the API, and add frame message listener that supports API
+   * invocations.
+   */
+  [noscript] void initializeBrowserAPI();
+
+  /**
+   * Notify frame scripts that support the API to destroy.
+   */
+  [noscript] void destroyBrowserFrameScripts();
+};