--- a/dom/cellbroadcast/tests/marionette/test_cellbroadcast_etws.js
+++ b/dom/cellbroadcast/tests/marionette/test_cellbroadcast_etws.js
@@ -258,11 +258,11 @@ function cleanUp() {
 
   SpecialPowers.removePermission("mobileconnection", document);
   SpecialPowers.removePermission("cellbroadcast", true, document);
 
   finish();
 }
 
 waitFor(testEtwsMessageAttributes, function () {
-  return navigator.mozMobileConnection.voice.connected;
+  return navigator.mozMobileConnections[0].voice.connected;
 });
 

--- a/dom/cellbroadcast/tests/marionette/test_cellbroadcast_gsm.js
+++ b/dom/cellbroadcast/tests/marionette/test_cellbroadcast_gsm.js
@@ -471,11 +471,11 @@ function cleanUp() {
 
   SpecialPowers.removePermission("mobileconnection", document);
   SpecialPowers.removePermission("cellbroadcast", true, document);
 
   finish();
 }
 
 waitFor(testGsmMessageAttributes, function () {
-  return navigator.mozMobileConnection.voice.connected;
+  return navigator.mozMobileConnections[0].voice.connected;
 });
 

--- a/dom/network/tests/marionette/test_call_barring_change_password.js
+++ b/dom/network/tests/marionette/test_call_barring_change_password.js
@@ -5,17 +5,17 @@ MARIONETTE_TIMEOUT = 60000;
 
 SpecialPowers.addPermission("mobileconnection", true, document);
 
 // Permission changes can't change existing Navigator.prototype
 // objects, so grab our objects from a new Navigator
 let ifr = document.createElement("iframe");
 let connection;
 ifr.onload = function() {
-  connection = ifr.contentWindow.navigator.mozMobileConnection;
+  connection = ifr.contentWindow.navigator.mozMobileConnections[0];
 
   ok(connection instanceof ifr.contentWindow.MozMobileConnection,
      "connection is instanceof " + connection.constructor);
 
   setTimeout(testChangeCallBarringPasswordWithFailure, 0);
 };
 document.body.appendChild(ifr);
 

--- a/dom/network/tests/marionette/test_call_barring_get_option.js
+++ b/dom/network/tests/marionette/test_call_barring_get_option.js
@@ -5,17 +5,17 @@ MARIONETTE_TIMEOUT = 60000;
 
 SpecialPowers.addPermission("mobileconnection", true, document);
 
 // Permission changes can't change existing Navigator.prototype
 // objects, so grab our objects from a new Navigator
 let ifr = document.createElement("iframe");
 let connection;
 ifr.onload = function() {
-  connection = ifr.contentWindow.navigator.mozMobileConnection;
+  connection = ifr.contentWindow.navigator.mozMobileConnections[0];
 
   ok(connection instanceof ifr.contentWindow.MozMobileConnection,
      "connection is instanceof " + connection.constructor);
 
   testGetCallBarringOption();
 };
 document.body.appendChild(ifr);
 

--- a/dom/network/tests/marionette/test_call_barring_set_error.js
+++ b/dom/network/tests/marionette/test_call_barring_set_error.js
@@ -5,17 +5,17 @@ MARIONETTE_TIMEOUT = 60000;
 
 SpecialPowers.addPermission("mobileconnection", true, document);
 
 // Permission changes can't change existing Navigator.prototype
 // objects, so grab our objects from a new Navigator
 let ifr = document.createElement("iframe");
 let connection;
 ifr.onload = function() {
-  connection = ifr.contentWindow.navigator.mozMobileConnection;
+  connection = ifr.contentWindow.navigator.mozMobileConnections[0];
 
   ok(connection instanceof ifr.contentWindow.MozMobileConnection,
      "connection is instanceof " + connection.constructor);
 
   nextTest();
 };
 document.body.appendChild(ifr);
 

--- a/dom/network/tests/marionette/test_mobile_data_connection.js
+++ b/dom/network/tests/marionette/test_mobile_data_connection.js
@@ -8,17 +8,17 @@ const DATA_ROAMING_KEY = "ril.data.roami
 const APN_KEY = "ril.data.apnSettings";
 
 SpecialPowers.setBoolPref("dom.mozSettings.enabled", true);
 SpecialPowers.addPermission("mobileconnection", true, document);
 SpecialPowers.addPermission("settings-read", true, document);
 SpecialPowers.addPermission("settings-write", true, document);
 
 let settings = window.navigator.mozSettings;
-let connection = window.navigator.mozMobileConnection;
+let connection = window.navigator.mozMobileConnections[0];
 ok(connection instanceof MozMobileConnection,
    "connection is instanceof " + connection.constructor);
 
 
 let pendingEmulatorCmdCount = 0;
 function sendCmdToEmulator(cmd, callback) {
   ++pendingEmulatorCmdCount;
 

--- a/dom/network/tests/marionette/test_mobile_data_location.js
+++ b/dom/network/tests/marionette/test_mobile_data_location.js
@@ -5,17 +5,17 @@ MARIONETTE_TIMEOUT = 20000;
 
 SpecialPowers.addPermission("mobileconnection", true, document);
 
 // Permission changes can't change existing Navigator.prototype
 // objects, so grab our objects from a new Navigator
 let ifr = document.createElement("iframe");
 let mobileConnection;
 ifr.onload = function() {
-  mobileConnection = ifr.contentWindow.navigator.mozMobileConnection;
+  mobileConnection = ifr.contentWindow.navigator.mozMobileConnections[0];
 
   // Start the test
   verifyInitialState();
 };
 document.body.appendChild(ifr);
 
 let emulatorStartLac = 0;
 let emulatorStartCid = 0;

--- a/dom/network/tests/marionette/test_mobile_data_state.js
+++ b/dom/network/tests/marionette/test_mobile_data_state.js
@@ -5,17 +5,17 @@ MARIONETTE_TIMEOUT = 30000;
 
 SpecialPowers.addPermission("mobileconnection", true, document);
 
 // Permission changes can't change existing Navigator.prototype
 // objects, so grab our objects from a new Navigator
 let ifr = document.createElement("iframe");
 let mobileConnection;
 ifr.onload = function() {
-  mobileConnection = ifr.contentWindow.navigator.mozMobileConnection;
+  mobileConnection = ifr.contentWindow.navigator.mozMobileConnections[0];
 
   // Start the test
   verifyInitialState();
 };
 document.body.appendChild(ifr);
 
 function verifyInitialState() {
   log("Verifying initial state.");

--- a/dom/network/tests/marionette/test_mobile_mmi.js
+++ b/dom/network/tests/marionette/test_mobile_mmi.js
@@ -5,17 +5,17 @@ MARIONETTE_TIMEOUT = 20000;
 
 SpecialPowers.addPermission("mobileconnection", true, document);
 
 // Permission changes can't change existing Navigator.prototype
 // objects, so grab our objects from a new Navigator
 let ifr = document.createElement("iframe");
 let mobileConnection;
 ifr.onload = function() {
-  mobileConnection = ifr.contentWindow.navigator.mozMobileConnection;
+  mobileConnection = ifr.contentWindow.navigator.mozMobileConnections[0];
 
   tasks.run();
 };
 document.body.appendChild(ifr);
 
 let tasks = {
   // List of test functions. Each of them should call |tasks.next()| when
   // completed or |tasks.abort()| to jump to the last one.

--- a/dom/network/tests/marionette/test_mobile_networks.js
+++ b/dom/network/tests/marionette/test_mobile_networks.js
@@ -1,17 +1,17 @@
 /* Any copyright is dedicated to the Public Domain.
    http://creativecommons.org/publicdomain/zero/1.0/ */
 
 // getNetworks() can take some time..
 MARIONETTE_TIMEOUT = 60000;
  
 SpecialPowers.addPermission("mobileconnection", true, document);
 
-let connection = navigator.mozMobileConnection;
+let connection = navigator.mozMobileConnections[0];
 ok(connection instanceof MozMobileConnection,
    "connection is instanceof " + connection.constructor);
 
 is(connection.networkSelectionMode, "automatic");
 
 let androidNetwork = null;
 let telkilaNetwork = null;
 

--- a/dom/network/tests/marionette/test_mobile_operator_names.js
+++ b/dom/network/tests/marionette/test_mobile_operator_names.js
@@ -10,17 +10,17 @@ const OPERATOR_ROAMING = 1;
 
 // Permission changes can't change existing Navigator.prototype
 // objects, so grab our objects from a new Navigator
 let ifr = document.createElement("iframe");
 let connection;
 let voice;
 let network;
 ifr.onload = function() {
-  connection = ifr.contentWindow.navigator.mozMobileConnection;
+  connection = ifr.contentWindow.navigator.mozMobileConnections[0];
   ok(connection instanceof ifr.contentWindow.MozMobileConnection,
      "connection is instanceof " + connection.constructor);
 
   voice = connection.voice;
   ok(voice, "voice connection valid");
 
   network = voice.network;
   ok(network, "voice network info valid");

--- a/dom/network/tests/marionette/test_mobile_preferred_network_type.js
+++ b/dom/network/tests/marionette/test_mobile_preferred_network_type.js
@@ -55,11 +55,11 @@ function cleanUp() {
   SpecialPowers.removePermission("mobileconnection", document);
   SpecialPowers.removePermission("settings-write", document);
   SpecialPowers.removePermission("settings-read", document);
 
   finish();
 }
 
 waitFor(test_revert_previous_setting_on_invalid_value, function () {
-  return navigator.mozMobileConnection.voice.connected;
+  return navigator.mozMobileConnections[0].voice.connected;
 });
 

--- a/dom/network/tests/marionette/test_mobile_roaming_preference.js
+++ b/dom/network/tests/marionette/test_mobile_roaming_preference.js
@@ -1,16 +1,16 @@
 /* Any copyright is dedicated to the Public Domain.
    http://creativecommons.org/publicdomain/zero/1.0/ */
 
 MARIONETTE_TIMEOUT = 60000;
 
 SpecialPowers.addPermission("mobileconnection", true, document);
 
-let connection = navigator.mozMobileConnection;
+let connection = navigator.mozMobileConnections[0];
 ok(connection instanceof MozMobileConnection,
    "connection is instanceof " + connection.constructor);
 
 function failedToSetRoamingPreference(mode, expectedErrorMessage, callback) {
   let request = connection.setRoamingPreference(mode);
 
   ok(request instanceof DOMRequest,
      "request instanceof " + request.constructor);

--- a/dom/network/tests/marionette/test_mobile_voice_state.js
+++ b/dom/network/tests/marionette/test_mobile_voice_state.js
@@ -5,17 +5,17 @@ MARIONETTE_TIMEOUT = 30000;
 
 SpecialPowers.addPermission("mobileconnection", true, document);
 
 // Permission changes can't change existing Navigator.prototype
 // objects, so grab our objects from a new Navigator
 let ifr = document.createElement("iframe");
 let connection;
 ifr.onload = function() {
-  connection = ifr.contentWindow.navigator.mozMobileConnection;
+  connection = ifr.contentWindow.navigator.mozMobileConnections[0];
   ok(connection instanceof ifr.contentWindow.MozMobileConnection,
      "connection is instanceof " + connection.constructor);
   testConnectionInfo();
 };
 document.body.appendChild(ifr);
 
 let emulatorCmdPendingCount = 0;
 function setEmulatorVoiceState(state) {

--- a/dom/permission/tests/test_mobileconnection.html
+++ b/dom/permission/tests/test_mobileconnection.html
@@ -14,17 +14,17 @@ https://bugzilla.mozilla.org/show_bug.cg
 <p id="display"></p>
 <div id="content" style="display: none"></div>
 <pre id="test">
 <script type="application/javascript;version=1.8" src="file_framework.js"></script>
 <script type="application/javascript;version=1.8">
 var gData = [
   {
     perm: ["mobileconnection"],
-    obj: "mozMobileConnection",
-    idl: "nsIDOMMozMobileConnection",
+    obj: "mozMobileConnections",
+    webidl: "MozMobileConnectionArray",
   },
 ]
 </script>
 </pre>
 </body>
 </html>
 

--- a/dom/telephony/test/marionette/test_outgoing_radio_off.js
+++ b/dom/telephony/test/marionette/test_outgoing_radio_off.js
@@ -76,17 +76,17 @@ function cleanUp() {
 }
 
 let permissions = [
   "mobileconnection",
   "settings-write"
 ];
 
 startTestWithPermissions(permissions, function() {
-  connection = navigator.mozMobileConnection;
+  connection = navigator.mozMobileConnections[0];
   ok(connection instanceof MozMobileConnection,
      "connection is instanceof " + connection.constructor);
 
   icc = navigator.mozIccManager;
   ok(icc instanceof MozIccManager, "icc is instanceof " + icc.constructor);
 
   setRadioEnabled(false, function() {
     dial("0912345678");

--- a/dom/tests/mochitest/general/test_interfaces.html
+++ b/dom/tests/mochitest/general/test_interfaces.html
@@ -346,16 +346,17 @@ var interfaceNamesInGlobalScope =
     "MozCSSKeyframesRule",
     {name: "MozEmergencyCbModeEvent", b2g: true, pref: "dom.mobileconnection.enabled"},
     {name: "MozIccManager", b2g: true, pref: "dom.icc.enabled"},
     {name: "MozInputContext", b2g: true},
     {name: "MozInputMethodManager", b2g: true},
     "MozMmsEvent",
     "MozMmsMessage",
     {name: "MozMobileConnection", b2g: true, pref: "dom.mobileconnection.enabled"},
+    {name: "MozMobileConnectionArray", b2g: true, pref: "dom.mobileconnection.enabled"},
     "MozMobileMessageManager",
     "MozMobileMessageThread",
     "MozNamedAttrMap",
     {name: "MozOtaStatusEvent", b2g: true, pref: "dom.mobileconnection.enabled"},
     "MozPowerManager",
     "mozRTCIceCandidate",
     "mozRTCPeerConnection",
     "mozRTCSessionDescription",