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diff --git a/tools/addon-sdk-1.4/packages/api-utils/lib/xul-app.js b/tools/addon-sdk-1.4/packages/api-utils/lib/xul-app.js
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+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Jetpack.
+ *
+ * The Initial Developer of the Original Code is Mozilla.
+ * Portions created by the Initial Developer are Copyright (C) 2007
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Atul Varma <atul@mozilla.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+"use strict";
+
+const {Cc, Ci} = require("chrome");
+
+var appInfo = Cc["@mozilla.org/xre/app-info;1"]
+              .getService(Ci.nsIXULAppInfo);
+
+var ID = exports.ID = appInfo.ID;
+var name = exports.name = appInfo.name;
+var version = exports.version = appInfo.version;
+var platformVersion = exports.platformVersion = appInfo.platformVersion;
+
+// The following mapping of application names to GUIDs was taken from:
+//
+//   https://addons.mozilla.org/en-US/firefox/pages/appversions
+//
+// Using the GUID instead of the app's name is preferable because sometimes
+// re-branded versions of a product have different names: for instance,
+// Firefox, Minefield, Iceweasel, and Shiretoko all have the same
+// GUID.
+// This mapping is duplicated in `app-extensions/bootstrap.js`. They should keep
+// in sync, so if you change one, change the other too!
+
+var ids = exports.ids = {
+  Firefox: "{ec8030f7-c20a-464f-9b0e-13a3a9e97384}",
+  Mozilla: "{86c18b42-e466-45a9-ae7a-9b95ba6f5640}",
+  Sunbird: "{718e30fb-e89b-41dd-9da7-e25a45638b28}",
+  SeaMonkey: "{92650c4d-4b8e-4d2a-b7eb-24ecf4f6b63a}",
+  Fennec: "{a23983c0-fd0e-11dc-95ff-0800200c9a66}",
+  Thunderbird: "{3550f703-e582-4d05-9a08-453d09bdfdc6}"
+};
+
+var is = exports.is = function is(name) {
+  if (!(name in ids))
+    throw new Error("Unkown Mozilla Application: " + name);
+  return ID == ids[name];
+};
+
+var isOneOf = exports.isOneOf = function isOneOf(names) {
+  for (var i = 0; i < names.length; i++)
+    if (is(names[i]))
+      return true;
+  return false;
+};
+
+/**
+ * Use this to check whether the given version (e.g. xulApp.platformVersion)
+ * is in the given range. Versions must be in version comparator-compatible
+ * format. See MDC for details:
+ * https://developer.mozilla.org/en/XPCOM_Interface_Reference/nsIVersionComparator
+ */
+var versionInRange = exports.versionInRange =
+function versionInRange(version, lowInclusive, highExclusive) {
+  var vc = Cc["@mozilla.org/xpcom/version-comparator;1"]
+           .getService(Ci.nsIVersionComparator);
+  return (vc.compare(version, lowInclusive) >= 0) &&
+         (vc.compare(version, highExclusive) < 0);
+}
+