--- a/dom/bluetooth/tests/marionette/head.js
+++ b/dom/bluetooth/tests/marionette/head.js
@@ -38,18 +38,25 @@ const REMOTE_DEVICE_NAME = "Remote_BT_De
 
 // A system message signature of pairing request event
 const BT_PAIRING_REQ = "bluetooth-pairing-request";
 
 // Passkey and pincode used to reply pairing requst
 const BT_PAIRING_PASSKEY = 123456;
 const BT_PAIRING_PINCODE = "ABCDEFG";
 
-let Promise =
-  SpecialPowers.Cu.import("resource://gre/modules/Promise.jsm").Promise;
+// Emulate Promise.jsm semantics.
+Promise.defer = function() { return new Deferred(); }
+function Deferred()  {
+  this.promise = new Promise(function(resolve, reject) {
+    this.resolve = resolve;
+    this.reject = reject;
+  }.bind(this));
+  Object.freeze(this);
+}
 
 let bluetoothManager;
 
 let pendingEmulatorCmdCount = 0;
 
 /**
  * Send emulator command with safe guard.
  *

--- a/dom/bluetooth2/tests/marionette/head.js
+++ b/dom/bluetooth2/tests/marionette/head.js
@@ -31,18 +31,25 @@ const EMULATOR_CLASS = 0x58020c;
 // which were defined at external/qemu/hw/bt.h:
 const BDADDR_ANY   = "00:00:00:00:00:00";
 const BDADDR_ALL   = "ff:ff:ff:ff:ff:ff";
 const BDADDR_LOCAL = "ff:ff:ff:00:00:00";
 
 // A user friendly name for remote BT device.
 const REMOTE_DEVICE_NAME = "Remote_BT_Device";
 
-let Promise =
-  SpecialPowers.Cu.import("resource://gre/modules/Promise.jsm").Promise;
+// Emulate Promise.jsm semantics.
+Promise.defer = function() { return new Deferred(); }
+function Deferred()  {
+  this.promise = new Promise(function(resolve, reject) {
+    this.resolve = resolve;
+    this.reject = reject;
+  }.bind(this));
+  Object.freeze(this);
+}
 
 let bluetoothManager;
 
 let pendingEmulatorCmdCount = 0;
 
 /**
  * Push required permissions and test if |navigator.mozBluetooth| exists.
  * Resolve if it does, reject otherwise.

--- a/dom/cellbroadcast/tests/marionette/head.js
+++ b/dom/cellbroadcast/tests/marionette/head.js
@@ -1,14 +1,22 @@
 /* Any copyright is dedicated to the Public Domain.
  * http://creativecommons.org/publicdomain/zero/1.0/ */
 
 const {Cc: Cc, Ci: Ci, Cr: Cr, Cu: Cu} = SpecialPowers;
 
-let Promise = Cu.import("resource://gre/modules/Promise.jsm").Promise;
+// Emulate Promise.jsm semantics.
+Promise.defer = function() { return new Deferred(); }
+function Deferred()  {
+  this.promise = new Promise(function(resolve, reject) {
+    this.resolve = resolve;
+    this.reject = reject;
+  }.bind(this));
+  Object.freeze(this);
+}
 
 const PDU_DCS_CODING_GROUP_BITS          = 0xF0;
 const PDU_DCS_MSG_CODING_7BITS_ALPHABET  = 0x00;
 const PDU_DCS_MSG_CODING_8BITS_ALPHABET  = 0x04;
 const PDU_DCS_MSG_CODING_16BITS_ALPHABET = 0x08;
 
 const PDU_DCS_MSG_CLASS_BITS             = 0x03;
 const PDU_DCS_MSG_CLASS_NORMAL           = 0xFF;

--- a/dom/mobilemessage/tests/marionette/head.js
+++ b/dom/mobilemessage/tests/marionette/head.js
@@ -1,14 +1,22 @@
 /* Any copyright is dedicated to the Public Domain.
  * http://creativecommons.org/publicdomain/zero/1.0/ */
 
 const {Cc: Cc, Ci: Ci, Cr: Cr, Cu: Cu} = SpecialPowers;
 
-let Promise = Cu.import("resource://gre/modules/Promise.jsm").Promise;
+// Emulate Promise.jsm semantics.
+Promise.defer = function() { return new Deferred(); }
+function Deferred()  {
+  this.promise = new Promise(function(resolve, reject) {
+    this.resolve = resolve;
+    this.reject = reject;
+  }.bind(this));
+  Object.freeze(this);
+}
 
 /**
  * Push a list of preference settings. Never reject.
  *
  * Fulfill params: (none)
  *
  * @param aPrefs
  *        An JS object.  For example:

--- a/dom/telephony/test/marionette/head.js
+++ b/dom/telephony/test/marionette/head.js
@@ -1,12 +1,21 @@
 /* Any copyright is dedicated to the Public Domain.
  * http://creativecommons.org/publicdomain/zero/1.0/ */
 
-let Promise = SpecialPowers.Cu.import("resource://gre/modules/Promise.jsm").Promise;
+// Emulate Promise.jsm semantics.
+Promise.defer = function() { return new Deferred(); }
+function Deferred()  {
+  this.promise = new Promise(function(resolve, reject) {
+    this.resolve = resolve;
+    this.reject = reject;
+  }.bind(this));
+  Object.freeze(this);
+}
+
 let telephony;
 let conference;
 
 const kPrefRilDebuggingEnabled = "ril.debugging.enabled";
 
 /**
  * Emulator helper.
  */

--- a/dom/tethering/tests/marionette/head.js
+++ b/dom/tethering/tests/marionette/head.js
@@ -20,18 +20,25 @@ const TETHERING_SETTING_DNS2 = "8.8.4.4"
  * Wifi tethering setting.
  */
 const TETHERING_SETTING_SSID = "FirefoxHotSpot";
 const TETHERING_SETTING_SECURITY = "open";
 const TETHERING_SETTING_KEY = "1234567890";
 
 const SETTINGS_RIL_DATA_ENABLED = 'ril.data.enabled';
 
-let Promise =
-  SpecialPowers.Cu.import("resource://gre/modules/Promise.jsm").Promise;
+// Emulate Promise.jsm semantics.
+Promise.defer = function() { return new Deferred(); }
+function Deferred()  {
+  this.promise = new Promise(function(resolve, reject) {
+    this.resolve = resolve;
+    this.reject = reject;
+  }.bind(this));
+  Object.freeze(this);
+}
 
 let gTestSuite = (function() {
   let suite = {};
 
   let tetheringManager;
   let pendingEmulatorShellCount = 0;
 
   /**

--- a/dom/voicemail/test/marionette/head.js
+++ b/dom/voicemail/test/marionette/head.js
@@ -3,17 +3,25 @@
 
 "use strict";
 
 const {Cc: Cc, Ci: Ci, Cr: Cr, Cu: Cu} = SpecialPowers;
 
 let RIL = {};
 Cu.import("resource://gre/modules/ril_consts.js", RIL);
 
-let Promise = Cu.import("resource://gre/modules/Promise.jsm").Promise;
+// Emulate Promise.jsm semantics.
+Promise.defer = function() { return new Deferred(); }
+function Deferred()  {
+  this.promise = new Promise(function(resolve, reject) {
+    this.resolve = resolve;
+    this.reject = reject;
+  }.bind(this));
+  Object.freeze(this);
+}
 
 const MWI_PDU_PREFIX = "0000";
 const MWI_PDU_UDH_PREFIX = "0040";
 const MWI_PID_DEFAULT = "00";
 const MWI_DCS_DISCARD_INACTIVE = "C0";
 const MWI_DCS_DISCARD_ACTIVE = "C8";
 const MWI_TIMESTAMP = "00000000000000";
 

--- a/dom/wifi/test/marionette/head.js
+++ b/dom/wifi/test/marionette/head.js
@@ -1,12 +1,20 @@
 /* Any copyright is dedicated to the Public Domain.
  * http://creativecommons.org/publicdomain/zero/1.0/ */
 
-let Promise = SpecialPowers.Cu.import('resource://gre/modules/Promise.jsm').Promise;
+// Emulate Promise.jsm semantics.
+Promise.defer = function() { return new Deferred(); }
+function Deferred()  {
+  this.promise = new Promise(function(resolve, reject) {
+    this.resolve = resolve;
+    this.reject = reject;
+  }.bind(this));
+  Object.freeze(this);
+}
 
 const STOCK_HOSTAPD_NAME = 'goldfish-hostapd';
 const HOSTAPD_CONFIG_PATH = '/data/misc/wifi/remote-hostapd/';
 
 const SETTINGS_RIL_DATA_ENABLED = 'ril.data.enabled';
 const SETTINGS_TETHERING_WIFI_ENABLED = 'tethering.wifi.enabled';
 const SETTINGS_TETHERING_WIFI_IP = 'tethering.wifi.ip';
 const SETTINGS_TETHERING_WIFI_SECURITY = 'tethering.wifi.security.type';