diff -r 000000000000 -r 6474c204b198 embedding/browser/webBrowser/nsIWebBrowserChrome3.idl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/embedding/browser/webBrowser/nsIWebBrowserChrome3.idl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,33 @@
+/* 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 "nsIWebBrowserChrome2.idl"
+#include "nsIURI.idl"
+#include "nsIDOMNode.idl"
+
+/**
+ * nsIWebBrowserChrome3 is an extension to nsIWebBrowserChrome2.
+ */
+[scriptable, uuid(7f2aa813-b250-4e46-afeb-97b1e91bc9a5)]
+interface nsIWebBrowserChrome3 : nsIWebBrowserChrome2
+{
+  /**
+   * Determines the appropriate target for a link.
+   *
+   * @param originalTarget
+   *        The original link target.
+   * @param linkURI
+   *        Link destination URI.
+   * @param aDOMNode
+   *        Link DOM node.
+   * @param isAppTab
+   *        Whether or not the link is in an app tab.
+   * @returns A new link target, if appropriate.
+   *          Otherwise returns originalTarget.
+   */
+  AString onBeforeLinkTraversal(in AString originalTarget,
+                                in nsIURI linkURI,
+                                in nsIDOMNode linkNode,
+                                in boolean isAppTab);
+};