diff -r 000000000000 -r 6474c204b198 addon-sdk/source/lib/sdk/indexed-db.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/addon-sdk/source/lib/sdk/indexed-db.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,58 @@
+/* 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/. */
+
+"use strict";
+
+module.metadata = {
+  "stability": "experimental"
+};
+
+const { Cc, Ci } = require("chrome");
+const { id } = require("./self");
+
+// placeholder, copied from bootstrap.js
+let sanitizeId = function(id){
+  let uuidRe =
+    /^\{([0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12})\}$/;
+
+  let domain = id.
+    toLowerCase().
+    replace(/@/g, "-at-").
+    replace(/\./g, "-dot-").
+    replace(uuidRe, "$1");
+
+  return domain
+};
+
+const PSEUDOURI = "indexeddb://" + sanitizeId(id) // https://bugzilla.mozilla.org/show_bug.cgi?id=779197
+
+// Firefox 26 and earlier releases don't support `indexedDB` in sandboxes
+// automatically, so we need to inject `indexedDB` to `this` scope ourselves.
+if (typeof(indexedDB) === "undefined") {
+  Cc["@mozilla.org/dom/indexeddb/manager;1"].
+    getService(Ci.nsIIndexedDatabaseManager).
+    initWindowless(this);
+
+  // Firefox 14 gets this with a prefix
+  if (typeof(indexedDB) === "undefined")
+    this.indexedDB = mozIndexedDB;
+}
+
+// Use XPCOM because `require("./url").URL` doesn't expose the raw uri object.
+let principaluri = Cc["@mozilla.org/network/io-service;1"].
+              getService(Ci.nsIIOService).
+              newURI(PSEUDOURI, null, null);
+
+let principal = Cc["@mozilla.org/scriptsecuritymanager;1"].
+	               getService(Ci.nsIScriptSecurityManager).
+	               getCodebasePrincipal(principaluri);
+
+exports.indexedDB = Object.freeze({
+  open: indexedDB.openForPrincipal.bind(indexedDB, principal),
+  deleteDatabase: indexedDB.deleteForPrincipal.bind(indexedDB, principal),
+  cmp: indexedDB.cmp
+});
+
+exports.IDBKeyRange = IDBKeyRange;
+exports.DOMException = Ci.nsIDOMDOMException;