Add m-esr52 at 52.6.0

author: Matt A. Tobin <mattatobin@localhost.localdomain> 2018-02-02 04:16:08 -0500
committer: Matt A. Tobin <mattatobin@localhost.localdomain> 2018-02-02 04:16:08 -0500
commit: 5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree: 10027f336435511475e392454359edea8e25895d /b2g/chrome
parent: 49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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49 files changed, 6270 insertions, 0 deletions
diff --git a/b2g/chrome/content/ErrorPage.js b/b2g/chrome/content/ErrorPage.js
new file mode 100644
index 000000000..d51782466
--- /dev/null
+++ b/b2g/chrome/content/ErrorPage.js
@@ -0,0 +1,73 @@
+/* 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';
+
+var Cu = Components.utils;
+var Cc = Components.classes;
+var Ci = Components.interfaces;
+
+dump("############ ErrorPage.js\n");
+
+var ErrorPageHandler = {
+  _reload: function() {
+    docShell.QueryInterface(Ci.nsIWebNavigation).reload(Ci.nsIWebNavigation.LOAD_FLAGS_NONE);
+  },
+
+  _certErrorPageEventHandler: function(e) {
+    let target = e.originalTarget;
+    let errorDoc = target.ownerDocument;
+
+    // If the event came from an ssl error page, it is one of the "Add
+    // Exception…" buttons.
+    if (/^about:certerror\?e=nssBadCert/.test(errorDoc.documentURI)) {
+      let permanent = errorDoc.getElementById("permanentExceptionButton");
+      let temp = errorDoc.getElementById("temporaryExceptionButton");
+      if (target == temp || target == permanent) {
+        sendAsyncMessage("ErrorPage:AddCertException", {
+          url: errorDoc.location.href,
+          isPermanent: target == permanent
+        });
+      }
+    }
+  },
+
+  _bindPageEvent: function(target) {
+    if (!target) {
+      return;
+    }
+
+    if (/^about:certerror/.test(target.documentURI)) {
+      let errorPageEventHandler = this._certErrorPageEventHandler.bind(this);
+      addEventListener("click", errorPageEventHandler, true, false);
+      let listener = function() {
+        removeEventListener("click", errorPageEventHandler, true);
+        removeEventListener("pagehide", listener, true);
+      }.bind(this);
+
+      addEventListener("pagehide", listener, true);
+    }
+  },
+
+  domContentLoadedHandler: function(e) {
+    let target = e.originalTarget;
+    let targetDocShell = target.defaultView
+                               .QueryInterface(Ci.nsIInterfaceRequestor)
+                               .getInterface(Ci.nsIWebNavigation);
+    if (targetDocShell != docShell) {
+      return;
+    }
+    this._bindPageEvent(target);
+  },
+
+  init: function() {
+    addMessageListener("ErrorPage:ReloadPage", this._reload.bind(this));
+    addEventListener('DOMContentLoaded',
+                     this.domContentLoadedHandler.bind(this),
+                     true);
+    this._bindPageEvent(content.document);
+  }
+};
+
+ErrorPageHandler.init();
diff --git a/b2g/chrome/content/aboutCertError.xhtml b/b2g/chrome/content/aboutCertError.xhtml
new file mode 100644
index 000000000..616657e54
--- /dev/null
+++ b/b2g/chrome/content/aboutCertError.xhtml
@@ -0,0 +1,233 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<!DOCTYPE html [
+  <!ENTITY % htmlDTD
+    PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+    "DTD/xhtml1-strict.dtd">
+  %htmlDTD;
+  <!ENTITY % globalDTD
+    SYSTEM "chrome://global/locale/global.dtd">
+  %globalDTD;
+  <!ENTITY % certerrorDTD
+    SYSTEM "chrome://b2g-l10n/locale/aboutCertError.dtd">
+  %certerrorDTD;
+]>
+
+<!-- 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/. -->
+<html xmlns="http://www.w3.org/1999/xhtml">
+  <head>
+    <title>&certerror.pagetitle;</title>
+    <meta name="viewport" content="width=device-width; user-scalable=false" />
+    <link rel="stylesheet" href="chrome://global/skin/netError.css" type="text/css" media="all" />
+    <!-- This page currently uses the same favicon as neterror.xhtml.
+         If the location of the favicon is changed for both pages, the
+         FAVICON_ERRORPAGE_URL symbol in toolkit/components/places/src/nsFaviconService.h
+         should be updated. If this page starts using a different favicon
+         than neterrorm nsFaviconService->SetAndLoadFaviconForPage
+         should be updated to ignore this one as well. -->
+    <link rel="icon" type="image/png" id="favicon" sizes="64x64" href="chrome://global/skin/icons/warning-64.png"/>
+
+    <script type="application/javascript"><![CDATA[
+      // Error url MUST be formatted like this:
+      //   about:certerror?e=error&u=url&d=desc
+
+      // Note that this file uses document.documentURI to get
+      // the URL (with the format from above). This is because
+      // document.location.href gets the current URI off the docshell,
+      // which is the URL displayed in the location bar, i.e.
+      // the URI that the user attempted to load.
+
+      function getCSSClass()
+      {
+        var url = document.documentURI;
+        var matches = url.match(/s\=([^&]+)\&/);
+        // s is optional, if no match just return nothing
+        if (!matches || matches.length < 2)
+          return "";
+
+        // parenthetical match is the second entry
+        return decodeURIComponent(matches[1]);
+      }
+
+      function getDescription()
+      {
+        var url = document.documentURI;
+        var desc = url.search(/d\=/);
+
+        // desc == -1 if not found; if so, return an empty string
+        // instead of what would turn out to be portions of the URI
+        if (desc == -1)
+          return "";
+
+        return decodeURIComponent(url.slice(desc + 2));
+      }
+
+      function initPage()
+      {
+        // Replace the "#1" string in the intro with the hostname.  Trickier
+        // than it might seem since we want to preserve the <b> tags, but
+        // not allow for any injection by just using innerHTML.  Instead,
+        // just find the right target text node.
+        var intro = document.getElementById('introContentP1');
+        function replaceWithHost(node) {
+          if (node.textContent == "#1")
+            node.textContent = location.host;
+          else
+            for(var i = 0; i < node.childNodes.length; i++)
+              replaceWithHost(node.childNodes[i]);
+        };
+        replaceWithHost(intro);
+
+        if (getCSSClass() == "expertBadCert") {
+          toggle('technicalContent');
+          toggle('expertContent');
+        }
+
+        var tech = document.getElementById("technicalContentText");
+        if (tech)
+          tech.textContent = getDescription();
+
+        addDomainErrorLink();
+      }
+
+      /* In the case of SSL error pages about domain mismatch, see if
+         we can hyperlink the user to the correct site.  We don't want
+         to do this generically since it allows MitM attacks to redirect
+         users to a site under attacker control, but in certain cases
+         it is safe (and helpful!) to do so.  Bug 402210
+      */
+      function addDomainErrorLink() {
+        // Rather than textContent, we need to treat description as HTML
+        var sd = document.getElementById("technicalContentText");
+        if (sd) {
+          var desc = getDescription();
+
+          // sanitize description text - see bug 441169
+
+          // First, find the index of the <a> tag we care about, being careful not to
+          // use an over-greedy regex
+          var re = /<a id="cert_domain_link" title="([^"]+)">/;
+          var result = re.exec(desc);
+          if(!result)
+            return;
+
+          // Remove sd's existing children
+          sd.textContent = "";
+
+          // Everything up to the link should be text content
+          sd.appendChild(document.createTextNode(desc.slice(0, result.index)));
+
+          // Now create the link itself
+          var anchorEl = document.createElement("a");
+          anchorEl.setAttribute("id", "cert_domain_link");
+          anchorEl.setAttribute("title", result[1]);
+          anchorEl.appendChild(document.createTextNode(result[1]));
+          sd.appendChild(anchorEl);
+
+          // Finally, append text for anything after the closing </a>
+          sd.appendChild(document.createTextNode(desc.slice(desc.indexOf("</a>") + "</a>".length)));
+        }
+
+        var link = document.getElementById('cert_domain_link');
+        if (!link)
+          return;
+
+        var okHost = link.getAttribute("title");
+        var thisHost = document.location.hostname;
+        var proto = document.location.protocol;
+
+        // If okHost is a wildcard domain ("*.example.com") let's
+        // use "www" instead.  "*.example.com" isn't going to
+        // get anyone anywhere useful. bug 432491
+        okHost = okHost.replace(/^\*\./, "www.");
+
+        /* case #1:
+         * example.com uses an invalid security certificate.
+         *
+         * The certificate is only valid for www.example.com
+         *
+         * Make sure to include the "." ahead of thisHost so that
+         * a MitM attack on paypal.com doesn't hyperlink to "notpaypal.com"
+         *
+         * We'd normally just use a RegExp here except that we lack a
+         * library function to escape them properly (bug 248062), and
+         * domain names are famous for having '.' characters in them,
+         * which would allow spurious and possibly hostile matches.
+         */
+        if (endsWith(okHost, "." + thisHost))
+          link.href = proto + okHost;
+
+        /* case #2:
+         * browser.garage.maemo.org uses an invalid security certificate.
+         *
+         * The certificate is only valid for garage.maemo.org
+         */
+        if (endsWith(thisHost, "." + okHost))
+          link.href = proto + okHost;
+
+        // If we set a link, meaning there's something helpful for
+        // the user here, expand the section by default
+        if (link.href && getCSSClass() != "expertBadCert")
+          toggle("technicalContent");
+      }
+
+      function endsWith(haystack, needle) {
+        return haystack.slice(-needle.length) == needle;
+      }
+
+      function toggle(id) {
+        var el = document.getElementById(id);
+        if (el.getAttribute("collapsed"))
+          el.setAttribute("collapsed", false);
+        else
+          el.setAttribute("collapsed", true);
+      }
+    ]]></script>
+  </head>
+
+  <body id="errorPage" class="certerror" dir="&locale.dir;">
+
+   <!-- Error Title -->
+   <div id="errorTitle">
+     <h1 class="errorTitleText">&certerror.longpagetitle;</h1>
+   </div>
+
+    <!-- PAGE CONTAINER (for styling purposes only) -->
+    <div id="errorPageContainer">
+
+      <!-- LONG CONTENT (the section most likely to require scrolling) -->
+      <div id="errorLongContent">
+        <div id="introContent">
+          <p id="introContentP1">&certerror.introPara1;</p>
+        </div>
+
+        <!-- The following sections can be unhidden by default by setting the
+             "browser.xul.error_pages.expert_bad_cert" pref to true -->
+        <div id="technicalContent" collapsed="true">
+          <h2 onclick="toggle('technicalContent');" id="technicalContentHeading">&certerror.technical.heading;</h2>
+          <p id="technicalContentText"/>
+        </div>
+
+        <div id="expertContent" collapsed="true">
+          <h2 onclick="toggle('expertContent');" id="expertContentHeading">&certerror.expert.heading;</h2>
+          <div>
+            <p>&certerror.expert.content;</p>
+            <p>&certerror.expert.contentPara2;</p>
+            <button id="temporaryExceptionButton">&certerror.addTemporaryException.label;</button>
+            <button id="permanentExceptionButton">&certerror.addPermanentException.label;</button>
+          </div>
+        </div>
+      </div>
+    </div>
+
+    <!--
+    - Note: It is important to run the script this way, instead of using
+    - an onload handler. This is because error pages are loaded as
+    - LOAD_BACKGROUND, which means that onload handlers will not be executed.
+    -->
+    <script type="application/javascript">initPage();</script>
+
+  </body>
+</html>
diff --git a/b2g/chrome/content/arrow.svg b/b2g/chrome/content/arrow.svg
new file mode 100644
index 000000000..d3d9e8246
--- /dev/null
+++ b/b2g/chrome/content/arrow.svg
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+
+<svg xmlns:svg="http://www.w3.org/2000/svg" xmlns="http://www.w3.org/2000/svg" version="1.1" width="11px" style="position: absolute; top: -moz-calc(50% - 2px);">
+  <polyline points="1 1 5 6 9 1" stroke="#414141" stroke-width="2" stroke-linecap="round" fill="transparent" stroke-linejoin="round"/>
+</svg>
diff --git a/b2g/chrome/content/blank.css b/b2g/chrome/content/blank.css
new file mode 100644
index 000000000..71914be1f
--- /dev/null
+++ b/b2g/chrome/content/blank.css
@@ -0,0 +1,7 @@
+/* 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/. */
+
+body {
+  background: black;
+}
diff --git a/b2g/chrome/content/blank.html b/b2g/chrome/content/blank.html
new file mode 100644
index 000000000..b8b20e2c6
--- /dev/null
+++ b/b2g/chrome/content/blank.html
@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<!-- 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/.  -->
+
+<html>
+  <head>
+    <link rel="stylesheet" href="blank.css" type="text/css" media="all" />
+  </head>
+</html>
diff --git a/b2g/chrome/content/content.css b/b2g/chrome/content/content.css
new file mode 100644
index 000000000..bb478087e
--- /dev/null
+++ b/b2g/chrome/content/content.css
@@ -0,0 +1,321 @@
+/* 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/. */
+
+@namespace url("http://www.w3.org/1999/xhtml");
+@namespace xul url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
+
+/* Style the scrollbars */
+xul|window xul|scrollbar {
+  display: none;
+}
+
+/* Bug 1041576 - Scrollable with scrollgrab should not have scrollbars */
+
+@-moz-document domain(system.gaiamobile.org) {
+  .browser-container > xul|scrollbar {
+    display: none;
+  }
+}
+
+%ifdef MOZ_GRAPHENE
+.moz-noscrollbars > xul|scrollbar {
+  display: none;
+}
+%endif
+
+xul|scrollbar[root="true"] {
+  position: relative;
+  z-index: 2147483647;
+}
+
+xul|scrollbar {
+  -moz-appearance: none !important;
+  background-color: transparent !important;
+  background-image: none !important;
+  border: 0px solid transparent !important;
+  pointer-events: none;
+}
+
+/* Scrollbar code will reset the margin to the correct side depending on
+   where layout actually puts the scrollbar */
+xul|scrollbar[orient="vertical"] {
+  margin-left: -8px;
+  min-width: 8px;
+  max-width: 8px;
+}
+
+xul|scrollbar[orient="vertical"] xul|thumb {
+  max-width: 6px !important;
+  min-width: 6px !important;
+}
+
+xul|scrollbar[orient="horizontal"] {
+  margin-top: -8px;
+  min-height: 8px;
+  max-height: 8px;
+}
+
+xul|scrollbar[orient="horizontal"] xul|thumb {
+  max-height: 6px !important;
+  min-height: 6px !important;
+}
+
+xul|scrollbar:not([active="true"]),
+xul|scrollbar[disabled] {
+  opacity: 0;
+}
+
+xul|scrollbarbutton {
+  min-height: 8px !important;
+  min-width: 8px !important;
+  -moz-appearance: none !important;
+  visibility: hidden;
+}
+
+xul|scrollbarbutton[sbattr="scrollbar-up-top"],
+xul|scrollbarbutton[sbattr="scrollbar-bottom-top"] {
+  display: none;
+}
+
+xul|thumb {
+  background-color: rgba(0, 0, 0, 0.4) !important;
+  -moz-border-top-colors: none !important;
+  -moz-border-bottom-colors: none !important;
+  -moz-border-right-colors: none !important;
+  -moz-border-left-colors: none !important;
+  border: 1px solid rgba(255, 255, 255, 0.4) !important;
+  border-radius: 3px;
+}
+
+xul|scrollbarbutton {
+  background-image: none !important;
+}
+
+%ifndef MOZ_GRAPHENE
+/* -moz-touch-enabled? media elements */
+:-moz-any(video, audio) > xul|videocontrols {
+  -moz-binding: url("chrome://global/content/bindings/videocontrols.xml#touchControlsGonk");
+}
+
+select:not([size]):not([multiple]) > xul|scrollbar,
+select[size="1"] > xul|scrollbar,
+select:not([size]):not([multiple]) xul|scrollbarbutton,
+select[size="1"] xul|scrollbarbutton {
+  display: block;
+  margin-left: 0;
+  min-width: 16px;
+}
+
+/* Override inverse OS themes */
+select,
+textarea,
+button,
+xul|button,
+* > input:not([type="image"]) {
+  -moz-appearance: none !important;  /* See bug 598421 for fixing the platform */
+  border-radius: 3px;
+}
+
+select[size],
+select[multiple],
+select[size][multiple],
+textarea,
+* > input:not([type="image"]) {
+  border-style: solid;
+  border-color: #7d7d7d;
+  color: #414141;
+  background-color: white;
+}
+
+/* Selects are handled by the form helper, see bug 685197 */
+select option, select optgroup {
+  pointer-events: none;
+}
+
+select:not([size]):not([multiple]),
+select[size="0"],
+select[size="1"],
+* > input[type="button"],
+* > input[type="submit"],
+* > input[type="reset"],
+button {
+  border-style: solid;
+  border-color: #7d7d7d;
+  color: #414141;
+  background: white linear-gradient(rgba(255,255,255,0.2) 0, rgba(215,215,215,0.5) 18px, rgba(115,115,115,0.5) 100%);
+}
+
+input[type="checkbox"] {
+  background-color: white;
+}
+
+input[type="radio"] {
+  background-color: white;
+}
+
+select {
+  border-width: 1px;
+  padding: 1px;
+}
+
+select:not([size]):not([multiple]),
+select[size="0"],
+select[size="1"] {
+  padding: 0 1px 0 1px;
+}
+
+* > input:not([type="image"]) {
+  border-width: 1px;
+  padding: 1px;
+}
+
+textarea {
+  resize: none;
+  border-width: 1px;
+  padding-inline-start: 1px;
+  padding-inline-end: 1px;
+  padding-block-start: 2px;
+  padding-block-end: 2px;
+}
+
+input[type="button"],
+input[type="submit"],
+input[type="reset"],
+button {
+  border-width: 1px;
+  padding-inline-start: 7px;
+  padding-inline-end: 7px;
+  padding-block-start: 0;
+  padding-block-end: 0;
+}
+
+input[type="radio"],
+input[type="checkbox"] {
+  border: 1px solid #a7a7a7 !important;
+  padding-inline-start: 1px;
+  padding-inline-end: 1px;
+  padding-block-start: 2px;
+  padding-block-end: 2px;
+}
+
+select > button {
+  border-width: 0px !important;
+  margin: 0px !important;
+  padding: 0px !important;
+  border-radius: 0;
+  color: #414141;
+
+  background-image: radial-gradient(at bottom left, #bbbbbb 40%, #f5f5f5), url(arrow.svg) !important;
+  background-color: transparent;
+  background-position: -15px center, 4px center !important;
+  background-repeat: no-repeat, no-repeat !important;
+  background-size: 100% 90%, auto auto;
+
+  -moz-binding: none !important;
+  position: relative !important;
+  font-size: inherit;
+}
+
+select[size]:focus,
+select[multiple]:focus,
+select[size][multiple]:focus,
+textarea:focus,
+input[type="file"]:focus > input[type="text"],
+* > input:not([type="image"]):focus {
+  outline: 0px !important;
+  border-style: solid;
+  border-color: rgb(94,128,153);
+  background-color: white;
+}
+
+select:not([size]):not([multiple]):focus,
+select[size="0"]:focus,
+select[size="1"]:focus,
+input[type="button"]:focus,
+input[type="submit"]:focus,
+input[type="reset"]:focus,
+button:focus {
+  outline: 0px !important;
+  border-style: solid;
+  border-color: rgb(94,128,153);
+  background: white linear-gradient(rgba(255,255,255,0.2) 0, rgba(198,225,256,0.2) 18px, rgba(27,113,177,0.5) 100%);
+}
+
+input[type="checkbox"]:focus,
+input[type="radio"]:focus {
+  border-color: #99c6e0 !important;
+}
+
+/* we need to be specific for selects because the above rules are specific too */
+textarea[disabled],
+select[size][disabled],
+select[multiple][disabled],
+select[size][multiple][disabled],
+select:not([size]):not([multiple])[disabled],
+select[size="0"][disabled],
+select[size="1"][disabled],
+button[disabled],
+* > input:not([type="image"])[disabled] {
+  color: rgba(0,0,0,0.3);
+  border-color: rgba(125,125,125,0.4);
+  border-style: solid;
+  border-width: 1px;
+  background-color: #f5f5f5;
+}
+
+select:not([size]):not([multiple])[disabled],
+select[size="0"][disabled],
+select[size="1"][disabled] {
+  background-color: #f5f5f5;
+}
+
+input[type="button"][disabled],
+input[type="submit"][disabled],
+input[type="reset"][disabled],
+button[disabled] {
+  padding-inline-start: 7px;
+  padding-inline-end: 7px;
+  padding-block-start: 0;
+  padding-block-end: 0;
+  background-color: #f5f5f5;
+}
+
+input[type="radio"][disabled],
+input[type="radio"][disabled]:active,
+input[type="radio"][disabled]:hover,
+input[type="radio"][disabled]:hover:active,
+input[type="checkbox"][disabled],
+input[type="checkbox"][disabled]:active,
+input[type="checkbox"][disabled]:hover,
+input[type="checkbox"][disabled]:hover:active {
+  border:1px solid rgba(125,125,125,0.4) !important;
+}
+
+select[disabled] > button {
+  opacity: 0.6;
+  padding: 1px 7px 1px 7px;
+}
+
+*:any-link:active,
+*[role=button]:active,
+button:active,
+option:active,
+select:active,
+label:active {
+  background-color: rgba(141, 184, 216, 0.5);
+}
+
+input[type=number] > div > div, /* work around bug 946184 */
+input[type=number]::-moz-number-spin-box {
+  display: none;
+}
+%endif
+
+%ifdef MOZ_WIDGET_GONK
+/* This binding only provide key shortcuts that we can't use on devices */
+input,
+textarea {
+-moz-binding: none !important;
+}
+%endif
diff --git a/b2g/chrome/content/desktop.css b/b2g/chrome/content/desktop.css
new file mode 100644
index 000000000..9612d732c
--- /dev/null
+++ b/b2g/chrome/content/desktop.css
@@ -0,0 +1,59 @@
+#controls {
+  position: absolute;
+  left: 0;
+  bottom:0;
+  right: 0;
+  height: 30px;
+  background-color: -moz-dialog;
+}
+
+#home-button {
+  margin: auto;
+  margin-top: 3px;
+  width: 24px;
+  height: 24px;
+  background: #eee url("images/desktop/home-black.png") center no-repeat;
+  border: 1px solid #888;
+  border-radius: 12px;
+  display: block;
+}
+
+#home-button::-moz-focus-inner {
+  padding: 0;
+  border: 0;
+}
+
+#home-button:hover {
+  background-image: url("images/desktop/home-white.png");
+  background-color: #ccc;
+  border-color: #555;
+}
+
+#home-button.active {
+  background-image: url("images/desktop/home-white.png");
+  background-color: #888;
+  border-color: black;
+}
+
+#rotate-button {
+  position: absolute;
+  top: 3px;
+  bottom: 3px;
+  right: 3px;
+  width: 24px;
+  height: 24px;
+  background: #eee url("images/desktop/rotate.png") center no-repeat;
+  border: 1px solid #888;
+  border-radius: 12px;
+  display: block;
+}
+
+#rotate-button:hover {
+  background-color: #ccc;
+  border-color: #555;
+}
+
+#rotate-button.active {
+  background-color: #888;
+  border-color: black;
+}
diff --git a/b2g/chrome/content/desktop.js b/b2g/chrome/content/desktop.js
new file mode 100644
index 000000000..5a1e7ff04
--- /dev/null
+++ b/b2g/chrome/content/desktop.js
@@ -0,0 +1,179 @@
+/* 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/. */
+
+var browserWindow = Services.wm.getMostRecentWindow("navigator:browser");
+var isMulet = "ResponsiveUI" in browserWindow;
+
+// Enable touch event shim on desktop that translates mouse events
+// into touch ones
+function enableTouch() {
+  let require = Cu.import('resource://devtools/shared/Loader.jsm', {})
+                  .devtools.require;
+  let { TouchEventSimulator } = require('devtools/shared/touch/simulator');
+  let touchEventSimulator = new TouchEventSimulator(shell.contentBrowser);
+  touchEventSimulator.start();
+}
+
+// Some additional buttons are displayed on simulators to fake hardware buttons.
+function setupButtons() {
+  let link = document.createElement('link');
+  link.type = 'text/css';
+  link.rel = 'stylesheet';
+  link.href = 'chrome://b2g/content/desktop.css';
+  document.head.appendChild(link);
+
+  let footer = document.createElement('footer');
+  footer.id = 'controls';
+  document.body.appendChild(footer);
+  let homeButton = document.createElement('button');
+  homeButton.id = 'home-button';
+  footer.appendChild(homeButton);
+  let rotateButton = document.createElement('button');
+  rotateButton.id = 'rotate-button';
+  footer.appendChild(rotateButton);
+
+  homeButton.addEventListener('mousedown', function() {
+    let window = shell.contentBrowser.contentWindow;
+    let e = new window.KeyboardEvent('keydown', {key: 'Home'});
+    window.dispatchEvent(e);
+    homeButton.classList.add('active');
+  });
+  homeButton.addEventListener('mouseup', function() {
+    let window = shell.contentBrowser.contentWindow;
+    let e = new window.KeyboardEvent('keyup', {key: 'Home'});
+    window.dispatchEvent(e);
+    homeButton.classList.remove('active');
+  });
+
+  Cu.import("resource://gre/modules/GlobalSimulatorScreen.jsm");
+  rotateButton.addEventListener('mousedown', function() {
+    rotateButton.classList.add('active');
+  });
+  rotateButton.addEventListener('mouseup', function() {
+    GlobalSimulatorScreen.flipScreen();
+    rotateButton.classList.remove('active');
+  });
+}
+
+function setupStorage() {
+  let directory = null;
+
+  // Get the --storage-path argument from the command line.
+  try {
+    let service = Cc['@mozilla.org/commandlinehandler/general-startup;1?type=b2gcmds'].getService(Ci.nsISupports);
+    let args = service.wrappedJSObject.cmdLine;
+    if (args) {
+      let path = args.handleFlagWithParam('storage-path', false);
+      directory = Cc['@mozilla.org/file/local;1'].createInstance(Ci.nsIFile);
+      directory.initWithPath(path);
+    }
+  } catch(e) {
+    directory = null;
+  }
+
+  // Otherwise, default to 'storage' folder within current profile.
+  if (!directory) {
+    directory = Services.dirsvc.get('ProfD', Ci.nsIFile);
+    directory.append('storage');
+    if (!directory.exists()) {
+      directory.create(Ci.nsIFile.DIRECTORY_TYPE, parseInt("755", 8));
+    }
+  }
+  dump("Set storage path to: " + directory.path + "\n");
+
+  // This is the magic, where we override the default location for the storages.
+  Services.prefs.setCharPref('device.storage.overrideRootDir', directory.path);
+}
+
+function checkDebuggerPort() {
+  // XXX: To be removed once bug 942756 lands.
+  // We are hacking 'unix-domain-socket' pref by setting a tcp port (number).
+  // SocketListener.open detects that it isn't a file path (string), and starts
+  // listening on the tcp port given here as command line argument.
+
+  // Get the command line arguments that were passed to the b2g client
+  let args;
+  try {
+    let service = Cc["@mozilla.org/commandlinehandler/general-startup;1?type=b2gcmds"].getService(Ci.nsISupports);
+    args = service.wrappedJSObject.cmdLine;
+  } catch(e) {}
+
+  if (!args) {
+    return;
+  }
+
+  let dbgport;
+  try {
+    dbgport = args.handleFlagWithParam('start-debugger-server', false);
+  } catch(e) {}
+
+  if (dbgport) {
+    dump('Opening debugger server on ' + dbgport + '\n');
+    Services.prefs.setCharPref('devtools.debugger.unix-domain-socket', dbgport);
+    navigator.mozSettings.createLock().set(
+      {'debugger.remote-mode': 'adb-devtools'});
+  }
+}
+
+
+function initResponsiveDesign() {
+  Cu.import('resource://devtools/client/responsivedesign/responsivedesign.jsm');
+  ResponsiveUIManager.on('on', function(event, {tab:tab}) {
+    let responsive = ResponsiveUIManager.getResponsiveUIForTab(tab);
+    let document = tab.ownerDocument;
+
+    // Only tweak reponsive mode for shell.html tabs.
+    if (tab.linkedBrowser.contentWindow != window) {
+      return;
+    }
+
+    // Disable transition as they mess up with screen size handler
+    responsive.transitionsEnabled = false;
+
+    responsive.buildPhoneUI();
+
+    responsive.rotatebutton.addEventListener('command', function (evt) {
+      GlobalSimulatorScreen.flipScreen();
+      evt.stopImmediatePropagation();
+      evt.preventDefault();
+    }, true);
+
+    // Enable touch events
+    responsive.enableTouch();
+  });
+
+
+  let mgr = browserWindow.ResponsiveUI.ResponsiveUIManager;
+  mgr.toggle(browserWindow, browserWindow.gBrowser.selectedTab);
+
+}
+
+function openDevtools() {
+  // Open devtool panel while maximizing its size according to screen size
+  Services.prefs.setIntPref('devtools.toolbox.sidebar.width',
+                            browserWindow.outerWidth - 550);
+  Services.prefs.setCharPref('devtools.toolbox.host', 'side');
+  let {gDevTools} = Cu.import('resource://devtools/client/framework/gDevTools.jsm', {});
+  let {devtools} = Cu.import("resource://devtools/shared/Loader.jsm", {});
+  let target = devtools.TargetFactory.forTab(browserWindow.gBrowser.selectedTab);
+  gDevTools.showToolbox(target);
+}
+
+window.addEventListener('ContentStart', function() {
+  // On Firefox Mulet, touch events are enabled within the responsive mode
+  if (!isMulet) {
+    enableTouch();
+  }
+  if (Services.prefs.getBoolPref('b2g.software-buttons')) {
+    setupButtons();
+  }
+  checkDebuggerPort();
+  setupStorage();
+  // On Firefox mulet, we automagically enable the responsive mode
+  // and show the devtools
+  if (isMulet) {
+    initResponsiveDesign(browserWindow);
+    openDevtools();
+  }
+});
diff --git a/b2g/chrome/content/devtools/adb.js b/b2g/chrome/content/devtools/adb.js
new file mode 100644
index 000000000..cebc6696b
--- /dev/null
+++ b/b2g/chrome/content/devtools/adb.js
@@ -0,0 +1,233 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- /
+/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* 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";
+
+// This file is only loaded on Gonk to manage ADB state
+
+Components.utils.import("resource://gre/modules/FileUtils.jsm");
+
+const DEBUG = false;
+var debug = function(str) {
+  dump("AdbController: " + str + "\n");
+}
+
+var AdbController = {
+  locked: undefined,
+  remoteDebuggerEnabled: undefined,
+  lockEnabled: undefined,
+  disableAdbTimer: null,
+  disableAdbTimeoutHours: 12,
+  umsActive: false,
+
+  setLockscreenEnabled: function(value) {
+    this.lockEnabled = value;
+    DEBUG && debug("setLockscreenEnabled = " + this.lockEnabled);
+    this.updateState();
+  },
+
+  setLockscreenState: function(value) {
+    this.locked = value;
+    DEBUG && debug("setLockscreenState = " + this.locked);
+    this.updateState();
+  },
+
+  setRemoteDebuggerState: function(value) {
+    this.remoteDebuggerEnabled = value;
+    DEBUG && debug("setRemoteDebuggerState = " + this.remoteDebuggerEnabled);
+    this.updateState();
+  },
+
+  startDisableAdbTimer: function() {
+    if (this.disableAdbTimer) {
+      this.disableAdbTimer.cancel();
+    } else {
+      this.disableAdbTimer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
+      try {
+        this.disableAdbTimeoutHours =
+          Services.prefs.getIntPref("b2g.adb.timeout-hours");
+      } catch (e) {
+        // This happens if the pref doesn't exist, in which case
+        // disableAdbTimeoutHours will still be set to the default.
+      }
+    }
+    if (this.disableAdbTimeoutHours <= 0) {
+      DEBUG && debug("Timer to disable ADB not started due to zero timeout");
+      return;
+    }
+
+    DEBUG && debug("Starting timer to disable ADB in " +
+                   this.disableAdbTimeoutHours + " hours");
+    let timeoutMilliseconds = this.disableAdbTimeoutHours * 60 * 60 * 1000;
+    this.disableAdbTimer.initWithCallback(this, timeoutMilliseconds,
+                                          Ci.nsITimer.TYPE_ONE_SHOT);
+  },
+
+  stopDisableAdbTimer: function() {
+    DEBUG && debug("Stopping timer to disable ADB");
+    if (this.disableAdbTimer) {
+      this.disableAdbTimer.cancel();
+      this.disableAdbTimer = null;
+    }
+  },
+
+  notify: function(aTimer) {
+    if (aTimer == this.disableAdbTimer) {
+      this.disableAdbTimer = null;
+      // The following dump will be the last thing that shows up in logcat,
+      // and will at least give the user a clue about why logcat was
+      // disconnected, if the user happens to be using logcat.
+      debug("ADB timer expired - disabling ADB\n");
+      navigator.mozSettings.createLock().set(
+        {'debugger.remote-mode': 'disabled'});
+    }
+  },
+
+  updateState: function() {
+    this.umsActive = false;
+  },
+
+  updateStateInternal: function() {
+    DEBUG && debug("updateStateInternal: called");
+
+    if (this.remoteDebuggerEnabled === undefined ||
+        this.lockEnabled === undefined ||
+        this.locked === undefined) {
+      // Part of initializing the settings database will cause the observers
+      // to trigger. We want to wait until both have been initialized before
+      // we start changing ther adb state. Without this then we can wind up
+      // toggling adb off and back on again (or on and back off again).
+      //
+      // For completeness, one scenario which toggles adb is using the unagi.
+      // The unagi has adb enabled by default (prior to b2g starting). If you
+      // have the phone lock disabled and remote debugging enabled, then we'll
+      // receive an unlock event and an rde event. However at the time we
+      // receive the unlock event we haven't yet received the rde event, so
+      // we turn adb off momentarily, which disconnects a logcat that might
+      // be running. Changing the defaults (in AdbController) just moves the
+      // problem to a different phone, which has adb disabled by default and
+      // we wind up turning on adb for a short period when we shouldn't.
+      //
+      // By waiting until both values are properly initialized, we avoid
+      // turning adb on or off accidentally.
+      DEBUG && debug("updateState: Waiting for all vars to be initialized");
+      return;
+    }
+
+    // Check if we have a remote debugging session going on. If so, we won't
+    // disable adb even if the screen is locked.
+    let isDebugging = USBRemoteDebugger.isDebugging;
+    DEBUG && debug("isDebugging=" + isDebugging);
+
+    // If USB Mass Storage, USB tethering, or a debug session is active,
+    // then we don't want to disable adb in an automatic fashion (i.e.
+    // when the screen locks or due to timeout).
+    let sysUsbConfig = libcutils.property_get("sys.usb.config").split(",");
+    let usbFuncActive = this.umsActive || isDebugging;
+    usbFuncActive |= (sysUsbConfig.indexOf("rndis") >= 0);
+    usbFuncActive |= (sysUsbConfig.indexOf("mtp") >= 0);
+
+    let enableAdb = this.remoteDebuggerEnabled &&
+      (!(this.lockEnabled && this.locked) || usbFuncActive);
+
+    let useDisableAdbTimer = true;
+    try {
+      if (Services.prefs.getBoolPref("marionette.defaultPrefs.enabled")) {
+        // Marionette is enabled. Marionette requires that adb be on (and also
+        // requires that remote debugging be off). The fact that marionette
+        // is enabled also implies that we're doing a non-production build, so
+        // we want adb enabled all of the time.
+        enableAdb = true;
+        useDisableAdbTimer = false;
+      }
+    } catch (e) {
+      // This means that the pref doesn't exist. Which is fine. We just leave
+      // enableAdb alone.
+    }
+
+    // Check wakelock to prevent adb from disconnecting when phone is locked
+    let lockFile = Cc['@mozilla.org/file/local;1'].createInstance(Ci.nsIFile);
+    lockFile.initWithPath('/sys/power/wake_lock');
+    if(lockFile.exists()) {
+      let foStream = Cc["@mozilla.org/network/file-input-stream;1"]
+            .createInstance(Ci.nsIFileInputStream);
+      let coStream = Cc["@mozilla.org/intl/converter-input-stream;1"]
+            .createInstance(Ci.nsIConverterInputStream);
+      let str = {};
+      foStream.init(lockFile, FileUtils.MODE_RDONLY, 0, 0);
+      coStream.init(foStream, "UTF-8", 0, 0);
+      coStream.readString(-1, str);
+      coStream.close();
+      foStream.close();
+      let wakeLockContents = str.value.replace(/\n/, "");
+      let wakeLockList = wakeLockContents.split(" ");
+      if (wakeLockList.indexOf("adb") >= 0) {
+        enableAdb = true;
+        useDisableAdbTimer = false;
+        DEBUG && debug("Keeping ADB enabled as ADB wakelock is present.");
+      } else {
+        DEBUG && debug("ADB wakelock not found.");
+      }
+    } else {
+      DEBUG && debug("Wake_lock file not found.");
+    }
+
+    DEBUG && debug("updateState: enableAdb = " + enableAdb +
+                   " remoteDebuggerEnabled = " + this.remoteDebuggerEnabled +
+                   " lockEnabled = " + this.lockEnabled +
+                   " locked = " + this.locked +
+                   " usbFuncActive = " + usbFuncActive);
+
+    // Configure adb.
+    let currentConfig = libcutils.property_get("persist.sys.usb.config");
+    let configFuncs = currentConfig.split(",");
+    if (currentConfig == "" || currentConfig == "none") {
+      // We want to treat none like the empty string.
+      // "".split(",") yields [""] and not []
+      configFuncs = [];
+    }
+    let adbIndex = configFuncs.indexOf("adb");
+
+    if (enableAdb) {
+      // Add adb to the list of functions, if not already present
+      if (adbIndex < 0) {
+        configFuncs.push("adb");
+      }
+    } else {
+      // Remove adb from the list of functions, if present
+      if (adbIndex >= 0) {
+        configFuncs.splice(adbIndex, 1);
+      }
+    }
+    let newConfig = configFuncs.join(",");
+    if (newConfig == "") {
+      // Convert the empty string back into none, since that's what init.rc
+      // needs.
+      newConfig = "none";
+    }
+    if (newConfig != currentConfig) {
+      DEBUG && debug("updateState: currentConfig = " + currentConfig);
+      DEBUG && debug("updateState:     newConfig = " + newConfig);
+      try {
+        libcutils.property_set("persist.sys.usb.config", newConfig);
+      } catch(e) {
+        Cu.reportError("Error configuring adb: " + e);
+      }
+    }
+    if (useDisableAdbTimer) {
+      if (enableAdb && !usbFuncActive) {
+        this.startDisableAdbTimer();
+      } else {
+        this.stopDisableAdbTimer();
+      }
+    }
+  }
+};
+
+SettingsListener.observe("lockscreen.locked", false,
+                         AdbController.setLockscreenState.bind(AdbController));
+SettingsListener.observe("lockscreen.enabled", false,
+                         AdbController.setLockscreenEnabled.bind(AdbController));
diff --git a/b2g/chrome/content/devtools/debugger.js b/b2g/chrome/content/devtools/debugger.js
new file mode 100644
index 000000000..11987a839
--- /dev/null
+++ b/b2g/chrome/content/devtools/debugger.js
@@ -0,0 +1,397 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- /
+/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* 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";
+
+XPCOMUtils.defineLazyGetter(this, "devtools", function() {
+  const { devtools } =
+    Cu.import("resource://devtools/shared/Loader.jsm", {});
+  return devtools;
+});
+
+XPCOMUtils.defineLazyGetter(this, "DebuggerServer", function() {
+  const { DebuggerServer } = devtools.require("devtools/server/main");
+  return DebuggerServer;
+});
+
+XPCOMUtils.defineLazyGetter(this, "B2GTabList", function() {
+  const { B2GTabList } =
+    devtools.require("resource://gre/modules/DebuggerActors.js");
+  return B2GTabList;
+});
+
+// Load the discovery module eagerly, so that it can set a device name at
+// startup.  This does not cause discovery to start listening for packets, as
+// that only happens once DevTools is enabled.
+devtools.require("devtools/shared/discovery/discovery");
+
+var RemoteDebugger = {
+  _listening: false,
+
+  /**
+   * Prompt the user to accept or decline the incoming connection.
+   *
+   * @param session object
+   *        The session object will contain at least the following fields:
+   *        {
+   *          authentication,
+   *          client: {
+   *            host,
+   *            port
+   *          },
+   *          server: {
+   *            host,
+   *            port
+   *          }
+   *        }
+   *        Specific authentication modes may include additional fields.  Check
+   *        the different |allowConnection| methods in
+   *        devtools/shared/security/auth.js.
+   * @return An AuthenticationResult value.
+   *         A promise that will be resolved to the above is also allowed.
+   */
+  allowConnection(session) {
+    if (this._promptingForAllow) {
+      // Don't stack connection prompts if one is already open
+      return DebuggerServer.AuthenticationResult.DENY;
+    }
+    this._listen();
+
+    this._promptingForAllow = new Promise(resolve => {
+      this._handleAllowResult = detail => {
+        this._handleAllowResult = null;
+        this._promptingForAllow = null;
+        // Newer Gaia supplies |authResult|, which is one of the
+        // AuthenticationResult values.
+        if (detail.authResult) {
+          resolve(detail.authResult);
+        } else if (detail.value) {
+          resolve(DebuggerServer.AuthenticationResult.ALLOW);
+        } else {
+          resolve(DebuggerServer.AuthenticationResult.DENY);
+        }
+      };
+
+      shell.sendChromeEvent({
+        type: "remote-debugger-prompt",
+        session
+      });
+    });
+
+    return this._promptingForAllow;
+  },
+
+  /**
+   * During OOB_CERT authentication, the user must transfer some data through some
+   * out of band mechanism from the client to the server to authenticate the
+   * devices.
+   *
+   * This implementation instructs Gaia to continually capture images which are
+   * passed back here and run through a QR decoder.
+   *
+   * @return An object containing:
+   *         * sha256: hash(ClientCert)
+   *         * k     : K(random 128-bit number)
+   *         A promise that will be resolved to the above is also allowed.
+   */
+  receiveOOB() {
+    if (this._receivingOOB) {
+      return this._receivingOOB;
+    }
+    this._listen();
+
+    const QR = devtools.require("devtools/shared/qrcode/index");
+    this._receivingOOB = new Promise((resolve, reject) => {
+      this._handleAuthEvent = detail => {
+        debug(detail.action);
+        if (detail.action === "abort") {
+          this._handleAuthEvent = null;
+          this._receivingOOB = null;
+          reject();
+          return;
+        }
+
+        if (detail.action !== "capture") {
+          return;
+        }
+
+        let url = detail.url;
+        QR.decodeFromURI(url).then(data => {
+          debug("Got auth data: " + data);
+          let oob = JSON.parse(data);
+
+          shell.sendChromeEvent({
+            type: "devtools-auth",
+            action: "stop"
+          });
+
+          this._handleAuthEvent = null;
+          this._receivingOOB = null;
+          resolve(oob);
+        }).catch(() => {
+          debug("No auth data, requesting new capture");
+          shell.sendChromeEvent({
+            type: "devtools-auth",
+            action: "capture"
+          });
+        });
+      };
+
+      // Show QR scanning dialog, get an initial capture
+      shell.sendChromeEvent({
+        type: "devtools-auth",
+        action: "start"
+      });
+    });
+
+    return this._receivingOOB;
+  },
+
+  _listen: function() {
+    if (this._listening) {
+      return;
+    }
+
+    this.handleEvent = this.handleEvent.bind(this);
+    let content = shell.contentBrowser.contentWindow;
+    content.addEventListener("mozContentEvent", this, false, true);
+    this._listening = true;
+  },
+
+  handleEvent: function(event) {
+    let detail = event.detail;
+    if (detail.type === "remote-debugger-prompt" && this._handleAllowResult) {
+      this._handleAllowResult(detail);
+    }
+    if (detail.type === "devtools-auth" && this._handleAuthEvent) {
+      this._handleAuthEvent(detail);
+    }
+  },
+
+  initServer: function() {
+    if (DebuggerServer.initialized) {
+      return;
+    }
+
+    // Ask for remote connections.
+    DebuggerServer.init();
+
+    // /!\ Be careful when adding a new actor, especially global actors.
+    // Any new global actor will be exposed and returned by the root actor.
+
+    // Add Firefox-specific actors, but prevent tab actors to be loaded in
+    // the parent process, unless we enable certified apps debugging.
+    let restrictPrivileges = Services.prefs.getBoolPref("devtools.debugger.forbid-certified-apps");
+    DebuggerServer.addBrowserActors("navigator:browser", restrictPrivileges);
+
+    // Allow debugging of chrome for any process
+    if (!restrictPrivileges) {
+      DebuggerServer.allowChromeProcess = true;
+    }
+
+    /**
+     * Construct a root actor appropriate for use in a server running in B2G.
+     * The returned root actor respects the factories registered with
+     * DebuggerServer.addGlobalActor only if certified apps debugging is on,
+     * otherwise we used an explicit limited list of global actors
+     *
+     * * @param connection DebuggerServerConnection
+     *        The conection to the client.
+     */
+    DebuggerServer.createRootActor = function createRootActor(connection)
+    {
+      let parameters = {
+        tabList: new B2GTabList(connection),
+        // Use an explicit global actor list to prevent exposing
+        // unexpected actors
+        globalActorFactories: restrictPrivileges ? {
+          webappsActor: DebuggerServer.globalActorFactories.webappsActor,
+          deviceActor: DebuggerServer.globalActorFactories.deviceActor,
+          settingsActor: DebuggerServer.globalActorFactories.settingsActor
+        } : DebuggerServer.globalActorFactories
+      };
+      let { RootActor } = devtools.require("devtools/server/actors/root");
+      let root = new RootActor(connection, parameters);
+      root.applicationType = "operating-system";
+      return root;
+    };
+
+    if (isGonk) {
+      DebuggerServer.on("connectionchange", function() {
+        AdbController.updateState();
+      });
+    }
+  }
+};
+
+RemoteDebugger.allowConnection =
+  RemoteDebugger.allowConnection.bind(RemoteDebugger);
+RemoteDebugger.receiveOOB =
+  RemoteDebugger.receiveOOB.bind(RemoteDebugger);
+
+var USBRemoteDebugger = {
+
+  get isDebugging() {
+    if (!this._listener) {
+      return false;
+    }
+
+    return DebuggerServer._connections &&
+           Object.keys(DebuggerServer._connections).length > 0;
+  },
+
+  start: function() {
+    if (this._listener) {
+      return;
+    }
+
+    RemoteDebugger.initServer();
+
+    let portOrPath =
+      Services.prefs.getCharPref("devtools.debugger.unix-domain-socket") ||
+      "/data/local/debugger-socket";
+
+    try {
+      debug("Starting USB debugger on " + portOrPath);
+      let AuthenticatorType = DebuggerServer.Authenticators.get("PROMPT");
+      let authenticator = new AuthenticatorType.Server();
+      authenticator.allowConnection = RemoteDebugger.allowConnection;
+      this._listener = DebuggerServer.createListener();
+      this._listener.portOrPath = portOrPath;
+      this._listener.authenticator = authenticator;
+      this._listener.open();
+      // Temporary event, until bug 942756 lands and offers a way to know
+      // when the server is up and running.
+      Services.obs.notifyObservers(null, "debugger-server-started", null);
+    } catch (e) {
+      debug("Unable to start USB debugger server: " + e);
+    }
+  },
+
+  stop: function() {
+    if (!this._listener) {
+      return;
+    }
+
+    try {
+      this._listener.close();
+      this._listener = null;
+    } catch (e) {
+      debug("Unable to stop USB debugger server: " + e);
+    }
+  }
+
+};
+
+var WiFiRemoteDebugger = {
+
+  start: function() {
+    if (this._listener) {
+      return;
+    }
+
+    RemoteDebugger.initServer();
+
+    try {
+      debug("Starting WiFi debugger");
+      let AuthenticatorType = DebuggerServer.Authenticators.get("OOB_CERT");
+      let authenticator = new AuthenticatorType.Server();
+      authenticator.allowConnection = RemoteDebugger.allowConnection;
+      authenticator.receiveOOB = RemoteDebugger.receiveOOB;
+      this._listener = DebuggerServer.createListener();
+      this._listener.portOrPath = -1 /* any available port */;
+      this._listener.authenticator = authenticator;
+      this._listener.discoverable = true;
+      this._listener.encryption = true;
+      this._listener.open();
+      let port = this._listener.port;
+      debug("Started WiFi debugger on " + port);
+    } catch (e) {
+      debug("Unable to start WiFi debugger server: " + e);
+    }
+  },
+
+  stop: function() {
+    if (!this._listener) {
+      return;
+    }
+
+    try {
+      this._listener.close();
+      this._listener = null;
+    } catch (e) {
+      debug("Unable to stop WiFi debugger server: " + e);
+    }
+  }
+
+};
+
+(function() {
+  // Track these separately here so we can determine the correct value for the
+  // pref "devtools.debugger.remote-enabled", which is true when either mode of
+  // using DevTools is enabled.
+  let devtoolsUSB = false;
+  let devtoolsWiFi = false;
+
+  // Keep the old setting to not break people that won't have updated
+  // gaia and gecko.
+  SettingsListener.observe("devtools.debugger.remote-enabled", false,
+                           function(value) {
+    devtoolsUSB = value;
+    Services.prefs.setBoolPref("devtools.debugger.remote-enabled",
+                               devtoolsUSB || devtoolsWiFi);
+    // This preference is consulted during startup
+    Services.prefs.savePrefFile(null);
+    try {
+      value ? USBRemoteDebugger.start() : USBRemoteDebugger.stop();
+    } catch(e) {
+      dump("Error while initializing USB devtools: " +
+           e + "\n" + e.stack + "\n");
+    }
+  });
+
+  SettingsListener.observe("debugger.remote-mode", "disabled", function(value) {
+    if (["disabled", "adb-only", "adb-devtools"].indexOf(value) == -1) {
+      dump("Illegal value for debugger.remote-mode: " + value + "\n");
+      return;
+    }
+
+    devtoolsUSB = value == "adb-devtools";
+    Services.prefs.setBoolPref("devtools.debugger.remote-enabled",
+                               devtoolsUSB || devtoolsWiFi);
+    // This preference is consulted during startup
+    Services.prefs.savePrefFile(null);
+
+    try {
+      (value == "adb-devtools") ? USBRemoteDebugger.start()
+                                : USBRemoteDebugger.stop();
+    } catch(e) {
+      dump("Error while initializing USB devtools: " +
+           e + "\n" + e.stack + "\n");
+    }
+
+    isGonk && AdbController.setRemoteDebuggerState(value != "disabled");
+  });
+
+  SettingsListener.observe("devtools.remote.wifi.enabled", false,
+                           function(value) {
+    devtoolsWiFi = value;
+    Services.prefs.setBoolPref("devtools.debugger.remote-enabled",
+                               devtoolsUSB || devtoolsWiFi);
+    // Allow remote debugging on non-local interfaces when WiFi debug is enabled
+    // TODO: Bug 1034411: Lock down to WiFi interface, instead of all interfaces
+    Services.prefs.setBoolPref("devtools.debugger.force-local", !value);
+    // This preference is consulted during startup
+    Services.prefs.savePrefFile(null);
+
+    try {
+      value ? WiFiRemoteDebugger.start() : WiFiRemoteDebugger.stop();
+    } catch(e) {
+      dump("Error while initializing WiFi devtools: " +
+           e + "\n" + e.stack + "\n");
+    }
+  });
+})();
diff --git a/b2g/chrome/content/devtools/hud.js b/b2g/chrome/content/devtools/hud.js
new file mode 100644
index 000000000..64e9d553d
--- /dev/null
+++ b/b2g/chrome/content/devtools/hud.js
@@ -0,0 +1,1017 @@
+/* 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';
+
+// settings.js loads this file when the HUD setting is enabled.
+
+const DEVELOPER_HUD_LOG_PREFIX = 'DeveloperHUD';
+const CUSTOM_HISTOGRAM_PREFIX = 'DEVTOOLS_HUD_CUSTOM_';
+const APPNAME_IDX = 3;
+const HISTNAME_IDX = 4;
+
+XPCOMUtils.defineLazyGetter(this, 'devtools', function() {
+  const {devtools} = Cu.import('resource://devtools/shared/Loader.jsm', {});
+  return devtools;
+});
+
+XPCOMUtils.defineLazyGetter(this, 'DebuggerClient', function() {
+  return devtools.require('devtools/shared/client/main').DebuggerClient;
+});
+
+XPCOMUtils.defineLazyGetter(this, 'WebConsoleUtils', function() {
+  return devtools.require('devtools/shared/webconsole/utils').Utils;
+});
+
+XPCOMUtils.defineLazyGetter(this, 'EventLoopLagFront', function() {
+  return devtools.require('devtools/shared/fronts/eventlooplag').EventLoopLagFront;
+});
+
+XPCOMUtils.defineLazyGetter(this, 'PerformanceEntriesFront', function() {
+  return devtools.require('devtools/server/actors/performance-entries').PerformanceEntriesFront;
+});
+
+XPCOMUtils.defineLazyGetter(this, 'MemoryFront', function() {
+  return devtools.require('devtools/server/actors/memory').MemoryFront;
+});
+
+Cu.import('resource://gre/modules/Frames.jsm');
+
+var _telemetryDebug = false;
+
+function telemetryDebug(...args) {
+  if (_telemetryDebug) {
+    args.unshift('[AdvancedTelemetry]');
+    console.log(...args);
+  }
+}
+
+/**
+ * The Developer HUD is an on-device developer tool that displays widgets,
+ * showing visual debug information about apps. Each widget corresponds to a
+ * metric as tracked by a metric watcher (e.g. consoleWatcher).
+ */
+var developerHUD = {
+
+  _targets: new Map(),
+  _histograms: new Set(),
+  _customHistograms: new Set(),
+  _client: null,
+  _conn: null,
+  _watchers: [],
+  _logging: true,
+  _telemetry: false,
+
+  /**
+   * This method registers a metric watcher that will watch one or more metrics
+   * on app frames that are being tracked. A watcher must implement the
+   * `trackTarget(target)` and `untrackTarget(target)` methods, register
+   * observed metrics with `target.register(metric)`, and keep them up-to-date
+   * with `target.update(metric, message)` when necessary.
+   */
+  registerWatcher(watcher) {
+    this._watchers.unshift(watcher);
+  },
+
+  init() {
+    if (this._client) {
+      return;
+    }
+
+    if (!DebuggerServer.initialized) {
+      RemoteDebugger.initServer();
+    }
+
+    // We instantiate a local debugger connection so that watchers can use our
+    // DebuggerClient to send requests to tab actors (e.g. the consoleActor).
+    // Note the special usage of the private _serverConnection, which we need
+    // to call connectToChild and set up child process actors on a frame we
+    // intend to track. These actors will use the connection to communicate with
+    // our DebuggerServer in the parent process.
+    let transport = DebuggerServer.connectPipe();
+    this._conn = transport._serverConnection;
+    this._client = new DebuggerClient(transport);
+
+    for (let w of this._watchers) {
+      if (w.init) {
+        w.init(this._client);
+      }
+    }
+
+    Frames.addObserver(this);
+
+    let appFrames = Frames.list().filter(frame => frame.getAttribute('mozapp'));
+    for (let frame of appFrames) {
+      this.trackFrame(frame);
+    }
+
+    SettingsListener.observe('hud.logging', this._logging, enabled => {
+      this._logging = enabled;
+    });
+
+    SettingsListener.observe('hud.telemetry.logging', _telemetryDebug, enabled => {
+      _telemetryDebug = enabled;
+    });
+
+    SettingsListener.observe('metrics.selectedMetrics.level', "", level => {
+      this._telemetry = (level === 'Enhanced');
+    });
+  },
+
+  uninit() {
+    if (!this._client) {
+      return;
+    }
+
+    for (let frame of this._targets.keys()) {
+      this.untrackFrame(frame);
+    }
+
+    Frames.removeObserver(this);
+
+    this._client.close();
+    delete this._client;
+  },
+
+  /**
+   * This method will ask all registered watchers to track and update metrics
+   * on an app frame.
+   */
+  trackFrame(frame) {
+    if (this._targets.has(frame)) {
+      return;
+    }
+
+    DebuggerServer.connectToChild(this._conn, frame).then(actor => {
+      let target = new Target(frame, actor);
+      this._targets.set(frame, target);
+
+      for (let w of this._watchers) {
+        w.trackTarget(target);
+      }
+    });
+  },
+
+  untrackFrame(frame) {
+    let target = this._targets.get(frame);
+    if (target) {
+      for (let w of this._watchers) {
+        w.untrackTarget(target);
+      }
+
+      target.destroy();
+      this._targets.delete(frame);
+    }
+  },
+
+  onFrameCreated(frame, isFirstAppFrame) {
+    let mozapp = frame.getAttribute('mozapp');
+    if (!mozapp) {
+      return;
+    }
+    this.trackFrame(frame);
+  },
+
+  onFrameDestroyed(frame, isLastAppFrame) {
+    let mozapp = frame.getAttribute('mozapp');
+    if (!mozapp) {
+      return;
+    }
+    this.untrackFrame(frame);
+  },
+
+  log(message) {
+    if (this._logging) {
+      dump(DEVELOPER_HUD_LOG_PREFIX + ': ' + message + '\n');
+    }
+  }
+
+};
+
+
+/**
+ * A Target object represents all there is to know about a Firefox OS app frame
+ * that is being tracked, e.g. a pointer to the frame, current values of watched
+ * metrics, and how to notify the front-end when metrics have changed.
+ */
+function Target(frame, actor) {
+  this.frame = frame;
+  this.actor = actor;
+  this.metrics = new Map();
+  this._appName = null;
+}
+
+Target.prototype = {
+
+  get manifest() {
+    return this.frame.appManifestURL;
+  },
+
+  get appName() {
+
+    if (this._appName) {
+      return this._appName;
+    }
+
+    let manifest = this.manifest;
+    if (!manifest) {
+      let msg = DEVELOPER_HUD_LOG_PREFIX + ': Unable to determine app for telemetry metric. src: ' +
+                this.frame.src;
+      console.error(msg);
+      return null;
+    }
+
+    // "communications" apps are a special case
+    if (manifest.indexOf('communications') === -1) {
+      let start = manifest.indexOf('/') + 2;
+      let end = manifest.indexOf('.', start);
+      this._appName = manifest.substring(start, end).toLowerCase();
+    } else {
+      let src = this.frame.src;
+      if (src) {
+        // e.g., `app://communications.gaiamobile.org/contacts/index.html`
+        let parts = src.split('/');
+        let APP = 3;
+        let EXPECTED_PARTS_LENGTH = 5;
+        if (parts.length === EXPECTED_PARTS_LENGTH) {
+          this._appName = parts[APP];
+        }
+      }
+    }
+
+    return this._appName;
+  },
+
+  /**
+   * Register a metric that can later be updated. Does not update the front-end.
+   */
+  register(metric) {
+    this.metrics.set(metric, 0);
+  },
+
+  /**
+   * Modify one of a target's metrics, and send out an event to notify relevant
+   * parties (e.g. the developer HUD, automated tests, etc).
+   */
+  update(metric, message) {
+    if (!metric.name) {
+      throw new Error('Missing metric.name');
+    }
+
+    if (!metric.value) {
+      metric.value = 0;
+    }
+
+    let metrics = this.metrics;
+    if (metrics) {
+      metrics.set(metric.name, metric.value);
+    }
+
+    let data = {
+      metrics: [], // FIXME(Bug 982066) Remove this field.
+      manifest: this.manifest,
+      metric: metric,
+      message: message
+    };
+
+    // FIXME(Bug 982066) Remove this loop.
+    if (metrics && metrics.size > 0) {
+      for (let name of metrics.keys()) {
+        data.metrics.push({name: name, value: metrics.get(name)});
+      }
+    }
+
+    if (message) {
+      developerHUD.log('[' + data.manifest + '] ' + data.message);
+    }
+
+    this._send(data);
+  },
+
+  /**
+   * Nicer way to call update() when the metric value is a number that needs
+   * to be incremented.
+   */
+  bump(metric, message) {
+    metric.value = (this.metrics.get(metric.name) || 0) + 1;
+    this.update(metric, message);
+  },
+
+  /**
+   * Void a metric value and make sure it isn't displayed on the front-end
+   * anymore.
+   */
+  clear(metric) {
+    metric.value = 0;
+    this.update(metric);
+  },
+
+  /**
+   * Tear everything down, including the front-end by sending a message without
+   * widgets.
+   */
+  destroy() {
+    delete this.metrics;
+    this._send({metric: {skipTelemetry: true}});
+  },
+
+  _send(data) {
+    let frame = this.frame;
+
+    shell.sendEvent(frame, 'developer-hud-update', Cu.cloneInto(data, frame));
+    this._logHistogram(data.metric);
+  },
+
+  _getAddonHistogram(item) {
+    let appName = this._getAddonHistogramName(item, APPNAME_IDX);
+    let histName = this._getAddonHistogramName(item, HISTNAME_IDX);
+
+    return Services.telemetry.getAddonHistogram(appName, CUSTOM_HISTOGRAM_PREFIX
+      + histName);
+  },
+
+  _getAddonHistogramName(item, index) {
+    let array = item.split('_');
+    return array[index].toUpperCase();
+  },
+
+  _clearTelemetryData() {
+    developerHUD._histograms.forEach(function(item) {
+      Services.telemetry.getKeyedHistogramById(item).clear();
+    });
+
+    developerHUD._customHistograms.forEach(item => {
+      this._getAddonHistogram(item).clear();
+    });
+  },
+
+  _sendTelemetryData() {
+    if (!developerHUD._telemetry) {
+      return;
+    }
+    telemetryDebug('calling sendTelemetryData');
+    let frame = this.frame;
+    let payload = {
+      keyedHistograms: {},
+      addonHistograms: {}
+    };
+    // Package the hud histograms.
+    developerHUD._histograms.forEach(function(item) {
+      payload.keyedHistograms[item] =
+        Services.telemetry.getKeyedHistogramById(item).snapshot();
+    });
+
+    // Package the registered hud custom histograms
+    developerHUD._customHistograms.forEach(item => {
+      let appName = this._getAddonHistogramName(item, APPNAME_IDX);
+      let histName = CUSTOM_HISTOGRAM_PREFIX +
+        this._getAddonHistogramName(item, HISTNAME_IDX);
+      let addonHist = Services.telemetry.getAddonHistogram(appName, histName).snapshot();
+      if (!(appName in payload.addonHistograms)) {
+        payload.addonHistograms[appName] = {};
+      }
+      // Do not include histograms with sum of 0.
+      if (addonHist.sum > 0) {
+        payload.addonHistograms[appName][histName] = addonHist;
+      }
+    });
+    shell.sendEvent(frame, 'advanced-telemetry-update', Cu.cloneInto(payload, frame));
+  },
+
+  _logHistogram(metric) {
+    if (!developerHUD._telemetry || metric.skipTelemetry) {
+      return;
+    }
+
+    metric.appName = this.appName;
+    if (!metric.appName) {
+      return;
+    }
+
+    let metricName = metric.name.toUpperCase();
+    let metricAppName = metric.appName.toUpperCase();
+    if (!metric.custom) {
+      let keyedMetricName = 'DEVTOOLS_HUD_' + metricName;
+      try {
+        let keyed = Services.telemetry.getKeyedHistogramById(keyedMetricName);
+        if (keyed) {
+          keyed.add(metric.appName, parseInt(metric.value, 10));
+          developerHUD._histograms.add(keyedMetricName);
+          telemetryDebug(keyedMetricName, metric.value, metric.appName);
+        }
+      } catch(err) {
+        console.error('Histogram error is metricname added to histograms.json:'
+          + keyedMetricName);
+      }
+    } else {
+      let histogramName = CUSTOM_HISTOGRAM_PREFIX + metricAppName + '_'
+        + metricName;
+      // This is a call to add a value to an existing histogram.
+      if (typeof metric.value !== 'undefined') {
+        Services.telemetry.getAddonHistogram(metricAppName,
+          CUSTOM_HISTOGRAM_PREFIX + metricName).add(parseInt(metric.value, 10));
+        telemetryDebug(histogramName, metric.value);
+        return;
+      }
+
+      // The histogram already exists and are not adding data to it.
+      if (developerHUD._customHistograms.has(histogramName)) {
+        return;
+      }
+
+      // This is a call to create a new histogram.
+      try {
+        let metricType = parseInt(metric.type, 10);
+        if (metricType === Services.telemetry.HISTOGRAM_COUNT) {
+          Services.telemetry.registerAddonHistogram(metricAppName,
+            CUSTOM_HISTOGRAM_PREFIX + metricName, metricType);
+        } else {
+          Services.telemetry.registerAddonHistogram(metricAppName,
+            CUSTOM_HISTOGRAM_PREFIX + metricName, metricType, metric.min,
+            metric.max, metric.buckets);
+        }
+        developerHUD._customHistograms.add(histogramName);
+      } catch (err) {
+        console.error('Histogram error: ' + err);
+      }
+    }
+  }
+};
+
+
+/**
+ * The Console Watcher tracks the following metrics in apps: reflows, warnings,
+ * and errors, with security errors reported separately.
+ */
+var consoleWatcher = {
+
+  _client: null,
+  _targets: new Map(),
+  _watching: {
+    reflows: false,
+    warnings: false,
+    errors: false,
+    security: false
+  },
+  _security: [
+    'Mixed Content Blocker',
+    'Mixed Content Message',
+    'CSP',
+    'Invalid HSTS Headers',
+    'Invalid HPKP Headers',
+    'Insecure Password Field',
+    'SSL',
+    'CORS'
+  ],
+  _reflowThreshold: 0,
+
+  init(client) {
+    this._client = client;
+    this.consoleListener = this.consoleListener.bind(this);
+
+    let watching = this._watching;
+
+    for (let key in watching) {
+      let metric = key;
+      SettingsListener.observe('hud.' + metric, watching[metric], watch => {
+        // Watch or unwatch the metric.
+        if (watching[metric] = watch) {
+          return;
+        }
+
+        // If unwatched, remove any existing widgets for that metric.
+        for (let target of this._targets.values()) {
+          target.clear({name: metric});
+        }
+      });
+    }
+
+    SettingsListener.observe('hud.reflows.duration', this._reflowThreshold, threshold => {
+      this._reflowThreshold = threshold;
+    });
+
+    client.addListener('logMessage', this.consoleListener);
+    client.addListener('pageError', this.consoleListener);
+    client.addListener('consoleAPICall', this.consoleListener);
+    client.addListener('reflowActivity', this.consoleListener);
+  },
+
+  trackTarget(target) {
+    target.register('reflows');
+    target.register('warnings');
+    target.register('errors');
+    target.register('security');
+
+    this._client.request({
+      to: target.actor.consoleActor,
+      type: 'startListeners',
+      listeners: ['LogMessage', 'PageError', 'ConsoleAPI', 'ReflowActivity']
+    }, (res) => {
+      this._targets.set(target.actor.consoleActor, target);
+    });
+  },
+
+  untrackTarget(target) {
+    this._client.request({
+      to: target.actor.consoleActor,
+      type: 'stopListeners',
+      listeners: ['LogMessage', 'PageError', 'ConsoleAPI', 'ReflowActivity']
+    }, (res) => { });
+
+    this._targets.delete(target.actor.consoleActor);
+  },
+
+  consoleListener(type, packet) {
+    let target = this._targets.get(packet.from);
+    let metric = {};
+    let output = '';
+
+    switch (packet.type) {
+
+      case 'pageError':
+        let pageError = packet.pageError;
+
+        if (pageError.warning || pageError.strict) {
+          metric.name = 'warnings';
+          output += 'Warning (';
+        } else {
+          metric.name = 'errors';
+          output += 'Error (';
+        }
+
+        if (this._security.indexOf(pageError.category) > -1) {
+          metric.name = 'security';
+
+          // Telemetry sends the security error category not the
+          // count of security errors.
+          target._logHistogram({
+            name: 'security_category',
+            value: pageError.category
+          });
+
+          // Indicate that the 'hud' security metric (the count of security
+          // errors) should not be sent as a telemetry metric since the
+          // security error category is being sent instead.
+          metric.skipTelemetry = true;
+        }
+
+        let {errorMessage, sourceName, category, lineNumber, columnNumber} = pageError;
+        output += category + '): "' + (errorMessage.initial || errorMessage) +
+          '" in ' + sourceName + ':' + lineNumber + ':' + columnNumber;
+        break;
+
+      case 'consoleAPICall':
+        switch (packet.message.level) {
+
+          case 'error':
+            metric.name = 'errors';
+            output += 'Error (console)';
+            break;
+
+          case 'warn':
+            metric.name = 'warnings';
+            output += 'Warning (console)';
+            break;
+
+          case 'info':
+            this.handleTelemetryMessage(target, packet);
+
+            // Currently, informational log entries are tracked only by
+            // telemetry. Nonetheless, for consistency, we continue here
+            // and let the function return normally, when it concludes 'info'
+            // entries are not being watched.
+            metric.name = 'info';
+            break;
+
+          default:
+            return;
+        }
+        break;
+
+      case 'reflowActivity':
+        metric.name = 'reflows';
+
+        let {start, end, sourceURL, interruptible} = packet;
+        metric.interruptible = interruptible;
+        let duration = Math.round((end - start) * 100) / 100;
+
+        // Record the reflow if the duration exceeds the threshold.
+        if (duration < this._reflowThreshold) {
+          return;
+        }
+
+        output += 'Reflow: ' + duration + 'ms';
+        if (sourceURL) {
+          output += ' ' + this.formatSourceURL(packet);
+        }
+
+        // Telemetry also records reflow duration.
+        target._logHistogram({
+          name: 'reflow_duration',
+          value: Math.round(duration)
+        });
+        break;
+
+      default:
+        return;
+    }
+
+    if (developerHUD._telemetry) {
+      // Always record telemetry for these metrics.
+      if (metric.name === 'errors' || metric.name === 'warnings' || metric.name === 'reflows') {
+        let value = target.metrics.get(metric.name);
+        metric.value = (value || 0) + 1;
+        target._logHistogram(metric);
+
+        // Telemetry has already been recorded.
+        metric.skipTelemetry = true;
+
+        // If the metric is not being watched, persist the incremented value.
+        // If the metric is being watched, `target.bump` will increment the value
+        // of the metric and will persist the incremented value.
+        if (!this._watching[metric.name]) {
+          target.metrics.set(metric.name, metric.value);
+        }
+      }
+    }
+
+    if (!this._watching[metric.name]) {
+      return;
+    }
+
+    target.bump(metric, output);
+  },
+
+  formatSourceURL(packet) {
+    // Abbreviate source URL
+    let source = WebConsoleUtils.abbreviateSourceURL(packet.sourceURL);
+
+    // Add function name and line number
+    let {functionName, sourceLine} = packet;
+    source = 'in ' + (functionName || '<anonymousFunction>') +
+      ', ' + source + ':' + sourceLine;
+
+    return source;
+  },
+
+  handleTelemetryMessage(target, packet) {
+    if (!developerHUD._telemetry) {
+      return;
+    }
+
+    // If this is a 'telemetry' log entry, create a telemetry metric from
+    // the log content.
+    let separator = '|';
+    let logContent = packet.message.arguments.toString();
+
+    if (logContent.indexOf('telemetry') < 0) {
+      return;
+    }
+
+    let telemetryData = logContent.split(separator);
+
+    // Positions of the components of a telemetry log entry.
+    let TELEMETRY_IDENTIFIER_IDX = 0;
+    let NAME_IDX = 1;
+    let VALUE_IDX = 2;
+    let TYPE_IDX = 2;
+    let MIN_IDX = 3;
+    let MAX_IDX = 4;
+    let BUCKETS_IDX = 5;
+    let MAX_CUSTOM_ARGS = 6;
+    let MIN_CUSTOM_ARGS = 3;
+
+    if (telemetryData[TELEMETRY_IDENTIFIER_IDX] != 'telemetry' ||
+        telemetryData.length < MIN_CUSTOM_ARGS ||
+        telemetryData.length > MAX_CUSTOM_ARGS) {
+      return;
+    }
+
+    let metric = {
+      name: telemetryData[NAME_IDX]
+    };
+
+    if (metric.name === 'MGMT') {
+      metric.value = telemetryData[VALUE_IDX];
+      if (metric.value === 'TIMETOSHIP') {
+        telemetryDebug('Received a Ship event');
+        target._sendTelemetryData();
+      } else if (metric.value === 'CLEARMETRICS') {
+        target._clearTelemetryData();
+      }
+    } else {
+      if (telemetryData.length === MIN_CUSTOM_ARGS) {
+        metric.value = telemetryData[VALUE_IDX];
+      } else if (telemetryData.length === MAX_CUSTOM_ARGS) {
+        metric.type = telemetryData[TYPE_IDX];
+        metric.min = telemetryData[MIN_IDX];
+        metric.max = telemetryData[MAX_IDX];
+        metric.buckets = telemetryData[BUCKETS_IDX];
+      }
+      metric.custom = true;
+      target._logHistogram(metric);
+    }
+  }
+};
+developerHUD.registerWatcher(consoleWatcher);
+
+
+var eventLoopLagWatcher = {
+  _client: null,
+  _fronts: new Map(),
+  _active: false,
+
+  init(client) {
+    this._client = client;
+
+    SettingsListener.observe('hud.jank', false, this.settingsListener.bind(this));
+  },
+
+  settingsListener(value) {
+    if (this._active == value) {
+      return;
+    }
+
+    this._active = value;
+
+    // Toggle the state of existing fronts.
+    let fronts = this._fronts;
+    for (let target of fronts.keys()) {
+      if (value) {
+        fronts.get(target).start();
+      } else {
+        fronts.get(target).stop();
+        target.clear({name: 'jank'});
+      }
+    }
+  },
+
+  trackTarget(target) {
+    target.register('jank');
+
+    let front = new EventLoopLagFront(this._client, target.actor);
+    this._fronts.set(target, front);
+
+    front.on('event-loop-lag', time => {
+      target.update({name: 'jank', value: time}, 'Jank: ' + time + 'ms');
+    });
+
+    if (this._active) {
+      front.start();
+    }
+  },
+
+  untrackTarget(target) {
+    let fronts = this._fronts;
+    if (fronts.has(target)) {
+      fronts.get(target).destroy();
+      fronts.delete(target);
+    }
+  }
+};
+developerHUD.registerWatcher(eventLoopLagWatcher);
+
+/*
+ * The performanceEntriesWatcher determines the delta between the epoch
+ * of an app's launch time and the epoch of the app's performance entry marks.
+ * When it receives an "appLaunch" performance entry mark it records the
+ * name of the app being launched and the epoch of when the launch ocurred.
+ * When it receives subsequent performance entry events for the app being
+ * launched, it records the delta of the performance entry opoch compared
+ * to the app-launch epoch and emits an "app-start-time-<performance mark name>"
+ * event containing the delta.
+ *
+ * Additionally, while recording the "app-start-time" for a performance mark,
+ * USS memory at the time of the performance mark is also recorded.
+ */
+var performanceEntriesWatcher = {
+  _client: null,
+  _fronts: new Map(),
+  _appLaunch: new Map(),
+  _supported: [
+    'contentInteractive',
+    'navigationInteractive',
+    'navigationLoaded',
+    'visuallyLoaded',
+    'fullyLoaded',
+    'mediaEnumerated',
+    'scanEnd'
+  ],
+
+  init(client) {
+    this._client = client;
+    let setting = 'devtools.telemetry.supported_performance_marks';
+    let defaultValue = this._supported.join(',');
+
+    SettingsListener.observe(setting, defaultValue, supported => {
+      this._supported = supported.split(',');
+    });
+  },
+
+  trackTarget(target) {
+    // The performanceEntries watcher doesn't register a metric because
+    // currently the metrics generated are not displayed in
+    // in the front-end.
+
+    let front = new PerformanceEntriesFront(this._client, target.actor);
+    this._fronts.set(target, front);
+
+    // User timings are always gathered; there is no setting to enable/
+    // disable.
+    front.start();
+
+    front.on('entry', detail => {
+
+      // Only process performance marks.
+      if (detail.type !== 'mark') {
+        return;
+      }
+
+      let name = detail.name;
+      let epoch = detail.epoch;
+
+      // If this is an "app launch" mark, record the app that was
+      // launched and the epoch of when it was launched.
+      if (name.indexOf('appLaunch') !== -1) {
+        let CHARS_UNTIL_APP_NAME = 7; // '@app://'
+        let startPos = name.indexOf('@app') + CHARS_UNTIL_APP_NAME;
+        let endPos = name.indexOf('.');
+        let appName = name.slice(startPos, endPos);
+        this._appLaunch.set(appName, epoch);
+        return;
+      }
+
+      // Only process supported performance marks
+      if (this._supported.indexOf(name) === -1) {
+        return;
+      }
+
+      let origin = detail.origin;
+      origin = origin.slice(0, origin.indexOf('.'));
+
+      let appLaunchTime = this._appLaunch.get(origin);
+
+      // Sanity check: ensure we have an app launch time for the app
+      // corresponding to this performance mark.
+      if (!appLaunchTime) {
+        return;
+      }
+
+      let time = epoch - appLaunchTime;
+      let eventName = 'app_startup_time_' + name;
+
+      // Events based on performance marks are for telemetry only, they are
+      // not displayed in the HUD front end.
+      target._logHistogram({name: eventName, value: time});
+
+      memoryWatcher.front(target).residentUnique().then(value => {
+        // bug 1215277, need 'v2' for app-memory histograms
+        eventName = 'app_memory_' + name + '_v2';
+        target._logHistogram({name: eventName, value: value});
+      }, err => {
+        console.error(err);
+      });
+    });
+  },
+
+  untrackTarget(target) {
+    let fronts = this._fronts;
+    if (fronts.has(target)) {
+      fronts.get(target).destroy();
+      fronts.delete(target);
+    }
+  }
+};
+developerHUD.registerWatcher(performanceEntriesWatcher);
+
+/**
+ * The Memory Watcher uses devtools actors to track memory usage.
+ */
+var memoryWatcher = {
+
+  _client: null,
+  _fronts: new Map(),
+  _timers: new Map(),
+  _watching: {
+    uss: false,
+    appmemory: false,
+    jsobjects: false,
+    jsstrings: false,
+    jsother: false,
+    dom: false,
+    style: false,
+    other: false
+  },
+  _active: false,
+
+  init(client) {
+    this._client = client;
+    let watching = this._watching;
+
+    for (let key in watching) {
+      let category = key;
+      SettingsListener.observe('hud.' + category, false, watch => {
+        watching[category] = watch;
+        this.update();
+      });
+    }
+  },
+
+  update() {
+    let watching = this._watching;
+    let active = watching.appmemory || watching.uss;
+
+    if (this._active) {
+      for (let target of this._fronts.keys()) {
+        if (!watching.appmemory) target.clear({name: 'memory'});
+        if (!watching.uss) target.clear({name: 'uss'});
+        if (!active) clearTimeout(this._timers.get(target));
+      }
+    } else if (active) {
+      for (let target of this._fronts.keys()) {
+        this.measure(target);
+      }
+    }
+    this._active = active;
+  },
+
+  measure(target) {
+    let watch = this._watching;
+    let format = this.formatMemory;
+
+    if (watch.uss) {
+      this.front(target).residentUnique().then(value => {
+        target.update({name: 'uss', value: value}, 'USS: ' + format(value));
+      }, err => {
+        console.error(err);
+      });
+    }
+
+    if (watch.appmemory) {
+      front.measure().then(data => {
+        let total = 0;
+        let details = [];
+
+        function item(name, condition, value) {
+          if (!condition) {
+            return;
+          }
+
+          let v = parseInt(value);
+          total += v;
+          details.push(name + ': ' + format(v));
+        }
+
+        item('JS objects', watch.jsobjects, data.jsObjectsSize);
+        item('JS strings', watch.jsstrings, data.jsStringsSize);
+        item('JS other', watch.jsother, data.jsOtherSize);
+        item('DOM', watch.dom, data.domSize);
+        item('Style', watch.style, data.styleSize);
+        item('Other', watch.other, data.otherSize);
+        // TODO Also count images size (bug #976007).
+
+        target.update({name: 'memory', value: total},
+          'App Memory: ' + format(total) + ' (' + details.join(', ') + ')');
+      }, err => {
+        console.error(err);
+      });
+    }
+
+    let timer = setTimeout(() => this.measure(target), 2000);
+    this._timers.set(target, timer);
+  },
+
+  formatMemory(bytes) {
+    var prefix = ['','K','M','G','T','P','E','Z','Y'];
+    var i = 0;
+    for (; bytes > 1024 && i < prefix.length; ++i) {
+      bytes /= 1024;
+    }
+    return (Math.round(bytes * 100) / 100) + ' ' + prefix[i] + 'B';
+  },
+
+  trackTarget(target) {
+    target.register('uss');
+    target.register('memory');
+    this._fronts.set(target, MemoryFront(this._client, target.actor));
+    if (this._active) {
+      this.measure(target);
+    }
+  },
+
+  untrackTarget(target) {
+    let front = this._fronts.get(target);
+    if (front) {
+      front.destroy();
+      clearTimeout(this._timers.get(target));
+      this._fronts.delete(target);
+      this._timers.delete(target);
+    }
+  },
+
+  front(target) {
+    return this._fronts.get(target);
+  }
+};
+developerHUD.registerWatcher(memoryWatcher);
diff --git a/b2g/chrome/content/identity.js b/b2g/chrome/content/identity.js
new file mode 100644
index 000000000..9c0ad50a2
--- /dev/null
+++ b/b2g/chrome/content/identity.js
@@ -0,0 +1,166 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- /
+/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* 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/. */
+
+// This JS shim contains the callbacks to fire DOMRequest events for
+// navigator.pay API within the payment processor's scope.
+
+"use strict";
+
+var { classes: Cc, interfaces: Ci, utils: Cu }  = Components;
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+Cu.import("resource://gre/modules/Services.jsm");
+
+XPCOMUtils.defineLazyServiceGetter(this, "cpmm",
+                                   "@mozilla.org/childprocessmessagemanager;1",
+                                   "nsIMessageSender");
+
+XPCOMUtils.defineLazyServiceGetter(this, "uuidgen",
+                                   "@mozilla.org/uuid-generator;1",
+                                   "nsIUUIDGenerator");
+
+XPCOMUtils.defineLazyModuleGetter(this, "Logger",
+                                  "resource://gre/modules/identity/LogUtils.jsm");
+
+function log(...aMessageArgs) {
+  Logger.log.apply(Logger, ["injected identity.js"].concat(aMessageArgs));
+}
+
+log("\n\n======================= identity.js =======================\n\n");
+
+// This script may be injected more than once into an iframe.
+// It's hard to do this with |const| like we should, so use var instead.
+if (typeof kIdentityJSLoaded === 'undefined') {
+  var kIdentityDelegateWatch = "identity-delegate-watch";
+  var kIdentityDelegateRequest = "identity-delegate-request";
+  var kIdentityDelegateLogout = "identity-delegate-logout";
+  var kIdentityDelegateReady = "identity-delegate-ready";
+  var kIdentityDelegateFinished = "identity-delegate-finished";
+  var kIdentityControllerDoMethod = "identity-controller-doMethod";
+  var kIdentktyJSLoaded = true;
+}
+
+var showUI = false;
+var options = {};
+var isLoaded = false;
+var func = null;
+
+/*
+ * Message back to the SignInToWebsite pipe.  Message should be an
+ * object with the following keys:
+ *
+ *   method:             one of 'login', 'logout', 'ready'
+ *   assertion:          optional assertion
+ */
+function identityCall(message) {
+  if (options._internal) {
+    message._internal = options._internal;
+  }
+  sendAsyncMessage(kIdentityControllerDoMethod, message);
+}
+
+/*
+ * To close the dialog, we first tell the gecko SignInToWebsite manager that it
+ * can clean up.  Then we tell the gaia component that we are finished.  It is
+ * necessary to notify gecko first, so that the message can be sent before gaia
+ * destroys our context.
+ */
+function closeIdentityDialog() {
+  // tell gecko we're done.
+  func = null; options = null;
+  sendAsyncMessage(kIdentityDelegateFinished);
+}
+
+/*
+ * doInternalWatch - call the internal.watch api and relay the results
+ * up to the controller.
+ */
+function doInternalWatch() {
+  log("doInternalWatch:", options, isLoaded);
+  if (options && isLoaded) {
+    let BrowserID = content.wrappedJSObject.BrowserID;
+    BrowserID.internal.watch(function(aParams, aInternalParams) {
+        identityCall(aParams);
+        if (aParams.method === "ready") {
+          closeIdentityDialog();
+        }
+      },
+      JSON.stringify(options),
+      function(...things) {
+        // internal watch log callback
+        log("(watch) internal: ", things);
+      }
+    );
+  }
+}
+
+function doInternalRequest() {
+  log("doInternalRequest:", options && isLoaded);
+  if (options && isLoaded) {
+    var stringifiedOptions = JSON.stringify(options);
+    content.wrappedJSObject.BrowserID.internal.get(
+      options.origin,
+      function(assertion, internalParams) {
+        internalParams = internalParams || {};
+        if (assertion) {
+          identityCall({
+            method: 'login',
+            assertion: assertion,
+            _internalParams: internalParams});
+        } else {
+          identityCall({
+            method: 'cancel'
+          });
+        }
+        closeIdentityDialog();
+      },
+      stringifiedOptions);
+  }
+}
+function doInternalLogout(aOptions) {
+  log("doInternalLogout:", (options && isLoaded));
+  if (options && isLoaded) {
+    let BrowserID = content.wrappedJSObject.BrowserID;
+    BrowserID.internal.logout(options.origin, function() {
+      identityCall({method:'logout'});
+      closeIdentityDialog();
+    });
+  }
+}
+
+addEventListener("DOMContentLoaded", function(e) {
+  content.addEventListener("load", function(e) {
+    isLoaded = true;
+     // bring da func
+     if (func) func();
+  });
+});
+
+// listen for request
+addMessageListener(kIdentityDelegateRequest, function(aMessage) {
+  log("injected identity.js received", kIdentityDelegateRequest);
+  options = aMessage.json;
+  showUI = true;
+  func = doInternalRequest;
+  func();
+});
+
+// listen for watch
+addMessageListener(kIdentityDelegateWatch, function(aMessage) {
+  log("injected identity.js received", kIdentityDelegateWatch);
+  options = aMessage.json;
+  showUI = false;
+  func = doInternalWatch;
+  func();
+});
+
+// listen for logout
+addMessageListener(kIdentityDelegateLogout, function(aMessage) {
+  log("injected identity.js received", kIdentityDelegateLogout);
+  options = aMessage.json;
+  showUI = false;
+  func = doInternalLogout;
+  func();
+});
diff --git a/b2g/chrome/content/images/arrowdown-16.png b/b2g/chrome/content/images/arrowdown-16.png
new file mode 100644
index 000000000..c982426f2
--- /dev/null
+++ b/b2g/chrome/content/images/arrowdown-16.png
diff --git a/b2g/chrome/content/images/arrowright-16.png b/b2g/chrome/content/images/arrowright-16.png
new file mode 100644
index 000000000..859e98ba6
--- /dev/null
+++ b/b2g/chrome/content/images/arrowright-16.png
diff --git a/b2g/chrome/content/images/desktop/home-black.png b/b2g/chrome/content/images/desktop/home-black.png
new file mode 100644
index 000000000..c51187ed4
--- /dev/null
+++ b/b2g/chrome/content/images/desktop/home-black.png
diff --git a/b2g/chrome/content/images/desktop/home-white.png b/b2g/chrome/content/images/desktop/home-white.png
new file mode 100644
index 000000000..43379d0e9
--- /dev/null
+++ b/b2g/chrome/content/images/desktop/home-white.png
diff --git a/b2g/chrome/content/images/desktop/rotate.png b/b2g/chrome/content/images/desktop/rotate.png
new file mode 100644
index 000000000..9da1b5674
--- /dev/null
+++ b/b2g/chrome/content/images/desktop/rotate.png
diff --git a/b2g/chrome/content/images/error.png b/b2g/chrome/content/images/error.png
new file mode 100644
index 000000000..58e37283a
--- /dev/null
+++ b/b2g/chrome/content/images/error.png
diff --git a/b2g/chrome/content/images/errorpage-larry-black.png b/b2g/chrome/content/images/errorpage-larry-black.png
new file mode 100644
index 000000000..9f2e4a6e7
--- /dev/null
+++ b/b2g/chrome/content/images/errorpage-larry-black.png
diff --git a/b2g/chrome/content/images/errorpage-larry-white.png b/b2g/chrome/content/images/errorpage-larry-white.png
new file mode 100644
index 000000000..fc153c731
--- /dev/null
+++ b/b2g/chrome/content/images/errorpage-larry-white.png
diff --git a/b2g/chrome/content/images/errorpage-warning.png b/b2g/chrome/content/images/errorpage-warning.png
new file mode 100644
index 000000000..8bf9d8e7d
--- /dev/null
+++ b/b2g/chrome/content/images/errorpage-warning.png
diff --git a/b2g/chrome/content/images/exitfullscreen-hdpi.png b/b2g/chrome/content/images/exitfullscreen-hdpi.png
new file mode 100644
index 000000000..826e53408
--- /dev/null
+++ b/b2g/chrome/content/images/exitfullscreen-hdpi.png
diff --git a/b2g/chrome/content/images/fullscreen-hdpi.png b/b2g/chrome/content/images/fullscreen-hdpi.png
new file mode 100644
index 000000000..980e78731
--- /dev/null
+++ b/b2g/chrome/content/images/fullscreen-hdpi.png
diff --git a/b2g/chrome/content/images/mute-hdpi.png b/b2g/chrome/content/images/mute-hdpi.png
new file mode 100644
index 000000000..6daf7cf71
--- /dev/null
+++ b/b2g/chrome/content/images/mute-hdpi.png
diff --git a/b2g/chrome/content/images/pause-hdpi.png b/b2g/chrome/content/images/pause-hdpi.png
new file mode 100644
index 000000000..c7837f822
--- /dev/null
+++ b/b2g/chrome/content/images/pause-hdpi.png
diff --git a/b2g/chrome/content/images/play-hdpi.png b/b2g/chrome/content/images/play-hdpi.png
new file mode 100644
index 000000000..fd64f9697
--- /dev/null
+++ b/b2g/chrome/content/images/play-hdpi.png
diff --git a/b2g/chrome/content/images/scrubber-hdpi.png b/b2g/chrome/content/images/scrubber-hdpi.png
new file mode 100644
index 000000000..b965b73d5
--- /dev/null
+++ b/b2g/chrome/content/images/scrubber-hdpi.png
diff --git a/b2g/chrome/content/images/throbber.png b/b2g/chrome/content/images/throbber.png
new file mode 100644
index 000000000..c601ec80b
--- /dev/null
+++ b/b2g/chrome/content/images/throbber.png
diff --git a/b2g/chrome/content/images/unmute-hdpi.png b/b2g/chrome/content/images/unmute-hdpi.png
new file mode 100644
index 000000000..5de342bda
--- /dev/null
+++ b/b2g/chrome/content/images/unmute-hdpi.png
diff --git a/b2g/chrome/content/netError.css b/b2g/chrome/content/netError.css
new file mode 100644
index 000000000..59d06a00c
--- /dev/null
+++ b/b2g/chrome/content/netError.css
@@ -0,0 +1,131 @@
+/* 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/. */
+
+/*
+ *  This defines the look-and-feel styling of the error pages.
+ *  (see: netError.xhtml)
+ *
+ *  Original styling by William Price <bugzilla@mob.rice.edu>
+ *  Updated for mobile by: Wes Johnston <wjohnston@mozilla.com>
+ */
+
+body {
+  margin: 0;
+  padding: 0 8px 8px;
+  font-family: "Nokia Sans", Tahoma, sans-serif !important;
+}
+
+h1 {
+  font-size: 22px;
+}
+
+h2 {
+  font-size: 16px;
+}
+
+ul {
+  margin: 0px;
+  padding: 0px 0px 0px 1em;
+}
+
+li {
+  margin: 0px;
+  padding: 8px 0px;
+}
+
+#errorPage {
+  background-color: #CEE6F4;
+}
+
+#errorPage.certerror {
+  background-color: #EFD400;
+}
+
+#errorPage.blockedsite {
+  background-color: #BF0000;
+}
+
+#errorTitle {
+  background: url("chrome://b2g/content/images/errorpage-warning.png") left center no-repeat;
+  /* Scaled by .666 of their actual size */
+  background-size: 40px 40px;
+  background-origin: content-box;
+  min-height: 60px;
+  margin-left: auto;
+  margin-right: auto;
+  max-width: 500px;
+  margin-left: auto;
+  margin-right: auto;
+}
+
+#errorPage.certerror #errorTitle {
+  background-image: url("chrome://b2g/content/images/errorpage-larry-black.png");
+}
+
+#errorPage.blockedsite #errorTitle {
+  background-image: url("chrome://b2g/content/images/errorpage-larry-white.png");
+  color: white;
+}
+
+.errorTitleText {
+  padding: 0px 0px 0px 50px;
+  display: inline-block;
+  vertical-align: middle
+}
+
+#errorPageContainer {
+  background-color: white;
+  border: 1px solid #999999;
+  border-radius: 6px;
+  padding: 6px 20px 20px;
+  font-size: 14px;
+  max-width: 500px;
+  margin-left: auto;
+  margin-right: auto;
+}
+
+#errorShortDesc > p:empty {
+  display: none;
+}
+
+#errorShortDesc > p {
+  overflow: auto;
+  border-bottom: 1px solid #999999;
+  padding-bottom: 1em;
+}
+
+#errorPage.blockedsite #errorShortDesc > p {
+  font-weight: bold;
+  border-bottom: none;
+  padding-bottom: 0px;
+}
+
+#securityOverrideDiv {
+  padding-top: 10px;
+}
+
+div[collapsed] {
+  padding-left: 15px;
+  background-image: url("chrome://b2g/content/images/arrowright-16.png");
+  background-size: 11px 11px;
+  background-repeat: no-repeat;
+  background-position: left 0.3em;
+}
+
+div[collapsed="true"] {
+  background-image: url("chrome://b2g/content/images/arrowright-16.png");
+}
+
+div[collapsed="false"] {
+  background-image: url("chrome://b2g/content/images/arrowdown-16.png");
+}
+
+div[collapsed="true"] > p,
+div[collapsed="true"] > div {
+  display: none;
+}
+
+button {
+  padding: 0.3em !important;
+}
diff --git a/b2g/chrome/content/screen.js b/b2g/chrome/content/screen.js
new file mode 100644
index 000000000..a893e8844
--- /dev/null
+++ b/b2g/chrome/content/screen.js
@@ -0,0 +1,276 @@
+// screen.js:
+// Set the screen size, pixel density and scaling of the b2g client screen
+// based on the --screen command-line option, if there is one.
+// 
+// TODO: support multiple device pixels per CSS pixel
+// 
+
+var browserWindow = Services.wm.getMostRecentWindow("navigator:browser");
+var isMulet = "ResponsiveUI" in browserWindow;
+Cu.import("resource://gre/modules/GlobalSimulatorScreen.jsm");
+
+window.addEventListener('ContentStart', onStart);
+window.addEventListener('SafeModeStart', onStart);
+
+// We do this on ContentStart and SafeModeStart because querying the
+// displayDPI fails otherwise.
+function onStart() {
+  // This is the toplevel <window> element
+  let shell = document.getElementById('shell');
+
+  // The <browser> element inside it
+  let browser = document.getElementById('systemapp');
+
+  // Figure out the native resolution of the screen
+  let windowUtils = window.QueryInterface(Ci.nsIInterfaceRequestor)
+    .getInterface(Components.interfaces.nsIDOMWindowUtils);
+  let hostDPI = windowUtils.displayDPI;
+
+  let DEFAULT_SCREEN = '320x480';
+
+  // This is a somewhat random selection of named screens.
+  // Add more to this list when we support more hardware.
+  // Data from: http://en.wikipedia.org/wiki/List_of_displays_by_pixel_density
+  let screens = {
+    iphone: {
+      name: 'Apple iPhone', width:320, height:480,  dpi:163
+    },
+    ipad: {
+      name: 'Apple iPad', width:1024, height:768,  dpi:132
+    },
+    nexus_s: {
+      name: 'Samsung Nexus S', width:480, height:800, dpi:235
+    },
+    galaxy_s2: {
+      name: 'Samsung Galaxy SII (I9100)', width:480, height:800, dpi:219
+    },
+    galaxy_nexus: {
+      name: 'Samsung Galaxy Nexus', width:720, height:1280, dpi:316
+    },
+    galaxy_tab: {
+      name: 'Samsung Galaxy Tab 10.1', width:800, height:1280, dpi:149
+    },
+    wildfire: {
+      name: 'HTC Wildfire', width:240, height:320, dpi:125
+    },
+    tattoo: {
+      name: 'HTC Tattoo', width:240, height:320, dpi:143
+    },
+    salsa: {
+      name: 'HTC Salsa', width:320, height:480, dpi:170
+    },
+    chacha: {
+      name: 'HTC ChaCha', width:320, height:480, dpi:222
+    },
+  };
+
+  // Get the command line arguments that were passed to the b2g client
+  let args;
+  try {
+    let service = Cc["@mozilla.org/commandlinehandler/general-startup;1?type=b2gcmds"].getService(Ci.nsISupports);
+    args = service.wrappedJSObject.cmdLine;
+  } catch(e) {}
+
+  let screenarg = null;
+
+  // Get the --screen argument from the command line
+  try {
+    if (args) {
+      screenarg = args.handleFlagWithParam('screen', false);
+    }
+
+    // Override default screen size with a pref
+    if (screenarg === null && Services.prefs.prefHasUserValue('b2g.screen.size')) {
+      screenarg = Services.prefs.getCharPref('b2g.screen.size');
+    }
+
+    // If there isn't one, use the default screen
+    if (screenarg === null)
+      screenarg = DEFAULT_SCREEN;
+
+    // With no value, tell the user how to use it
+    if (screenarg == '')
+      usage();
+  }
+  catch(e) {
+    // If getting the argument value fails, its an error
+    usage();
+  }
+  
+  // Special case --screen=full goes into fullscreen mode
+  if (screenarg === 'full') {
+    shell.setAttribute('sizemode', 'fullscreen');
+    return;
+  } 
+
+  let width, height, ratio = 1.0;
+  let lastResizedWidth;
+
+  if (screenarg in screens) {
+    // If this is a named screen, get its data
+    let screen = screens[screenarg];
+    width = screen.width;
+    height = screen.height;
+    ratio = screen.ratio;
+  } else {
+    // Otherwise, parse the resolution and density from the --screen value.
+    // The supported syntax is WIDTHxHEIGHT[@DPI]
+    let match = screenarg.match(/^(\d+)x(\d+)(@(\d+(\.\d+)?))?$/);
+    
+    // Display usage information on syntax errors
+    if (match == null)
+      usage();
+    
+    // Convert strings to integers
+    width = parseInt(match[1], 10);
+    height = parseInt(match[2], 10);
+    if (match[4])
+      ratio = parseFloat(match[4], 10);
+
+    // If any of the values came out 0 or NaN or undefined, display usage
+    if (!width || !height || !ratio) {
+      usage();
+    }
+  }
+
+  Services.prefs.setCharPref('layout.css.devPixelsPerPx',
+                             ratio == 1 ? -1 : ratio);
+  let defaultOrientation = width < height ? 'portrait' : 'landscape';
+  GlobalSimulatorScreen.mozOrientation = GlobalSimulatorScreen.screenOrientation = defaultOrientation;
+
+  function resize() {
+    GlobalSimulatorScreen.width = width;
+    GlobalSimulatorScreen.height = height;
+
+    // Set the window width and height to desired size plus chrome
+    // Include the size of the toolbox displayed under the system app
+    let controls = document.getElementById('controls');
+    let controlsHeight = controls ? controls.getBoundingClientRect().height : 0;
+
+    if (isMulet) {
+      let tab = browserWindow.gBrowser.selectedTab;
+      let responsive = ResponsiveUIManager.getResponsiveUIForTab(tab);
+      responsive.setSize(width + 16*2,
+                         height + controlsHeight + 61);
+    } else {
+      let chromewidth = window.outerWidth - window.innerWidth;
+      let chromeheight = window.outerHeight - window.innerHeight + controlsHeight;
+
+      if (lastResizedWidth == width) {
+        return;
+      }
+      lastResizedWidth = width;
+
+      window.resizeTo(width + chromewidth,
+                      height + chromeheight);
+    }
+
+    let frameWidth = width, frameHeight = height;
+
+    // If the current app doesn't supports the current screen orientation
+    // still resize the window, but rotate its frame so that
+    // it is displayed rotated on the side
+    let shouldFlip = GlobalSimulatorScreen.mozOrientation != GlobalSimulatorScreen.screenOrientation;
+
+    if (shouldFlip) {
+      frameWidth = height;
+      frameHeight = width;
+    }
+
+    // Set the browser element to the full unscaled size of the screen
+    let style = browser.style;
+    style.transform = '';
+    style.height = 'calc(100% - ' + controlsHeight + 'px)';
+    style.bottom = controlsHeight;
+
+    style.width = frameWidth + "px";
+    style.height = frameHeight + "px";
+
+    if (shouldFlip) {
+      // Display the system app with a 90° clockwise rotation
+      let shift = Math.floor(Math.abs(frameWidth - frameHeight) / 2);
+      style.transform +=
+        ' rotate(0.25turn) translate(-' + shift + 'px, -' + shift + 'px)';
+    }
+  }
+
+  // Resize on startup
+  resize();
+
+  // Catch manual resizes to update the internal device size.
+  window.onresize = function() {
+    let controls = document.getElementById('controls');
+    let controlsHeight = controls ? controls.getBoundingClientRect().height : 0;
+
+    width = window.innerWidth;
+    height = window.innerHeight - controlsHeight;
+
+    queueResize();
+  };
+
+  // Then resize on each rotation button click,
+  // or when the system app lock/unlock the orientation
+  Services.obs.addObserver(function orientationChangeListener(subject) {
+    let screen = subject.wrappedJSObject;
+    let { mozOrientation, screenOrientation } = screen;
+
+    // If we have an orientation different than the current one,
+    // we switch the sizes
+    if (screenOrientation != defaultOrientation) {
+      let w = width;
+      width = height;
+      height = w;
+    }
+    defaultOrientation = screenOrientation;
+
+    queueResize();
+  }, 'simulator-adjust-window-size', false);
+
+  // Queue resize request in order to prevent race and slowdowns
+  // by requesting resize multiple times per loop
+  let resizeTimeout;
+  function queueResize() {
+    if (resizeTimeout) {
+      clearTimeout(resizeTimeout);
+    }
+    resizeTimeout = setTimeout(function () {
+      resizeTimeout = null;
+      resize();
+    }, 0);
+  }
+
+  // A utility function like console.log() for printing to the terminal window
+  // Uses dump(), but enables it first, if necessary
+  function print() {
+    let dump_enabled =
+      Services.prefs.getBoolPref('browser.dom.window.dump.enabled');
+
+    if (!dump_enabled)
+      Services.prefs.setBoolPref('browser.dom.window.dump.enabled', true);
+
+    dump(Array.prototype.join.call(arguments, ' ') + '\n');
+
+    if (!dump_enabled) 
+      Services.prefs.setBoolPref('browser.dom.window.dump.enabled', false);
+  }
+
+  // Print usage info for --screen and exit
+  function usage() {
+    // Documentation for the --screen argument
+    let msg = 
+      'The --screen argument specifies the desired resolution and\n' +
+      'pixel density of the simulated device screen. Use it like this:\n' +
+      '\t--screen=WIDTHxHEIGHT\t\t\t// E.g.: --screen=320x480\n' +
+      '\t--screen=WIDTHxHEIGHT@DOTS_PER_INCH\t// E.g.: --screen=480x800@250\n' +
+      '\t--screen=full\t\t\t\t// run in fullscreen mode\n' +
+      '\nYou can also specify certain device names:\n';
+    for(let p in screens)
+      msg += '\t--screen=' + p + '\t// ' + screens[p].name + '\n';
+
+    // Display the usage message
+    print(msg);
+
+    // Exit the b2g client
+    Services.startup.quit(Ci.nsIAppStartup.eAttemptQuit);
+  }
+}
diff --git a/b2g/chrome/content/settings.js b/b2g/chrome/content/settings.js
new file mode 100644
index 000000000..95921da4c
--- /dev/null
+++ b/b2g/chrome/content/settings.js
@@ -0,0 +1,698 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- /
+/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* 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";
+
+window.performance.mark('gecko-settings-loadstart');
+
+var Cc = Components.classes;
+var Ci = Components.interfaces;
+var Cu = Components.utils;
+var Cr = Components.results;
+
+// The load order is important here SettingsRequestManager _must_ be loaded
+// prior to using SettingsListener otherwise there is a race in acquiring the
+// lock and fulfilling it. If we ever move SettingsListener or this file down in
+// the load order of shell.html things will likely break.
+Cu.import('resource://gre/modules/SettingsRequestManager.jsm');
+Cu.import('resource://gre/modules/XPCOMUtils.jsm');
+Cu.import('resource://gre/modules/Services.jsm');
+Cu.import('resource://gre/modules/AppConstants.jsm');
+
+const isGonk = AppConstants.platform === 'gonk';
+
+if (isGonk) {
+  XPCOMUtils.defineLazyGetter(this, "libcutils", function () {
+    Cu.import("resource://gre/modules/systemlibs.js");
+    return libcutils;
+  });
+}
+
+XPCOMUtils.defineLazyServiceGetter(this, "uuidgen",
+                                   "@mozilla.org/uuid-generator;1",
+                                   "nsIUUIDGenerator");
+
+// Once Bug 731746 - Allow chrome JS object to implement nsIDOMEventTarget
+// is resolved this helper could be removed.
+var SettingsListener = {
+  _callbacks: {},
+
+  init: function sl_init() {
+    if ('mozSettings' in navigator && navigator.mozSettings) {
+      navigator.mozSettings.onsettingchange = this.onchange.bind(this);
+    }
+  },
+
+  onchange: function sl_onchange(evt) {
+    var callback = this._callbacks[evt.settingName];
+    if (callback) {
+      callback(evt.settingValue);
+    }
+  },
+
+  observe: function sl_observe(name, defaultValue, callback) {
+    var settings = window.navigator.mozSettings;
+    if (!settings) {
+      window.setTimeout(function() { callback(defaultValue); });
+      return;
+    }
+
+    if (!callback || typeof callback !== 'function') {
+      throw new Error('Callback is not a function');
+    }
+
+    var req = settings.createLock().get(name);
+    req.addEventListener('success', (function onsuccess() {
+      callback(typeof(req.result[name]) != 'undefined' ?
+        req.result[name] : defaultValue);
+    }));
+
+    this._callbacks[name] = callback;
+  }
+};
+
+SettingsListener.init();
+
+// =================== Mono Audio ======================
+
+SettingsListener.observe('accessibility.monoaudio.enable', false, function(value) {
+  Services.prefs.setBoolPref('accessibility.monoaudio.enable', value);
+});
+
+// =================== Console ======================
+
+SettingsListener.observe('debug.console.enabled', true, function(value) {
+  Services.prefs.setBoolPref('consoleservice.enabled', value);
+  Services.prefs.setBoolPref('layout.css.report_errors', value);
+});
+
+SettingsListener.observe('homescreen.manifestURL', 'Sentinel Value' , function(value) {
+  Services.prefs.setCharPref('dom.mozApps.homescreenURL', value);
+});
+
+// =================== Languages ====================
+SettingsListener.observe('language.current', 'en-US', function(value) {
+  Services.prefs.setCharPref('general.useragent.locale', value);
+
+  let prefName = 'intl.accept_languages';
+  let defaultBranch = Services.prefs.getDefaultBranch(null);
+
+  let intl = '';
+  try {
+    intl = defaultBranch.getComplexValue(prefName,
+                                         Ci.nsIPrefLocalizedString).data;
+  } catch(e) {}
+
+  // Bug 830782 - Homescreen is in English instead of selected locale after
+  // the first run experience.
+  // In order to ensure the current intl value is reflected on the child
+  // process let's always write a user value, even if this one match the
+  // current localized pref value.
+  if (!((new RegExp('^' + value + '[^a-z-_] *[,;]?', 'i')).test(intl))) {
+    value = value + ', ' + intl;
+  } else {
+    value = intl;
+  }
+  Services.prefs.setCharPref(prefName, value);
+
+  if (shell.hasStarted() == false) {
+    shell.bootstrap();
+  }
+});
+
+// =================== RIL ====================
+(function RILSettingsToPrefs() {
+  // DSDS default service IDs
+  ['mms', 'sms', 'telephony'].forEach(function(key) {
+    SettingsListener.observe('ril.' + key + '.defaultServiceId', 0,
+                             function(value) {
+      if (value != null) {
+        Services.prefs.setIntPref('dom.' + key + '.defaultServiceId', value);
+      }
+    });
+  });
+})();
+
+//=================== DeviceInfo ====================
+Components.utils.import('resource://gre/modules/XPCOMUtils.jsm');
+Components.utils.import('resource://gre/modules/ctypes.jsm');
+(function DeviceInfoToSettings() {
+  // MOZ_B2G_VERSION is set in b2g/confvars.sh, and is output as a #define value
+  // from configure.in, defaults to 1.0.0 if this value is not exist.
+  let os_version = AppConstants.MOZ_B2G_VERSION;
+  let os_name = AppConstants.MOZ_B2G_OS_NAME;
+
+  let appInfo = Cc["@mozilla.org/xre/app-info;1"]
+                  .getService(Ci.nsIXULAppInfo);
+
+  // Get the hardware info and firmware revision from device properties.
+  let hardware_info = null;
+  let firmware_revision = null;
+  let product_manufacturer = null;
+  let product_model = null;
+  let product_device = null;
+  let build_number = null;
+  if (isGonk) {
+    hardware_info = libcutils.property_get('ro.hardware');
+    firmware_revision = libcutils.property_get('ro.firmware_revision');
+    product_manufacturer = libcutils.property_get('ro.product.manufacturer');
+    product_model = libcutils.property_get('ro.product.model');
+    product_device = libcutils.property_get('ro.product.device');
+    build_number = libcutils.property_get('ro.build.version.incremental');
+  }
+
+  // Populate deviceinfo settings,
+  // copying any existing deviceinfo.os into deviceinfo.previous_os
+  let lock = window.navigator.mozSettings.createLock();
+  let req = lock.get('deviceinfo.os');
+  req.onsuccess = req.onerror = () => {
+    let previous_os = req.result && req.result['deviceinfo.os'] || '';
+    let software = os_name + ' ' + os_version;
+    let setting = {
+      'deviceinfo.build_number': build_number,
+      'deviceinfo.os': os_version,
+      'deviceinfo.previous_os': previous_os,
+      'deviceinfo.software': software,
+      'deviceinfo.platform_version': appInfo.platformVersion,
+      'deviceinfo.platform_build_id': appInfo.platformBuildID,
+      'deviceinfo.hardware': hardware_info,
+      'deviceinfo.firmware_revision': firmware_revision,
+      'deviceinfo.product_manufacturer': product_manufacturer,
+      'deviceinfo.product_model': product_model,
+      'deviceinfo.product_device': product_device
+    }
+    lock.set(setting);
+  }
+})();
+
+// =================== DevTools ====================
+
+var developerHUD;
+SettingsListener.observe('devtools.overlay', false, (value) => {
+  if (value) {
+    if (!developerHUD) {
+      let scope = {};
+      Services.scriptloader.loadSubScript('chrome://b2g/content/devtools/hud.js', scope);
+      developerHUD = scope.developerHUD;
+    }
+    developerHUD.init();
+  } else {
+    if (developerHUD) {
+      developerHUD.uninit();
+    }
+  }
+});
+
+if (isGonk) {
+  var LogShake;
+  (function() {
+    let scope = {};
+    Cu.import('resource://gre/modules/LogShake.jsm', scope);
+    LogShake = scope.LogShake;
+    LogShake.init();
+  })();
+
+  SettingsListener.observe('devtools.logshake.enabled', false, value => {
+    if (value) {
+      LogShake.enableDeviceMotionListener();
+    } else {
+      LogShake.disableDeviceMotionListener();
+    }
+  });
+
+  SettingsListener.observe('devtools.logshake.qa_enabled', false, value => {
+    if (value) {
+      LogShake.enableQAMode();
+    } else {
+      LogShake.disableQAMode();
+    }
+  });
+}
+
+// =================== Device Storage ====================
+SettingsListener.observe('device.storage.writable.name', 'sdcard', function(value) {
+  if (Services.prefs.getPrefType('device.storage.writable.name') != Ci.nsIPrefBranch.PREF_STRING) {
+    // We clear the pref because it used to be erroneously written as a bool
+    // and we need to clear it before we can change it to have the correct type.
+    Services.prefs.clearUserPref('device.storage.writable.name');
+  }
+  Services.prefs.setCharPref('device.storage.writable.name', value);
+});
+
+// =================== Privacy ====================
+SettingsListener.observe('privacy.donottrackheader.value', 1, function(value) {
+  Services.prefs.setIntPref('privacy.donottrackheader.value', value);
+  // If the user specifically disallows tracking, we set the value of
+  // app.update.custom (update tracking ID) to an empty string.
+  if (value == 1) {
+    Services.prefs.setCharPref('app.update.custom', '');
+    return;
+  }
+  // Otherwise, we assure that the update tracking ID exists.
+  setUpdateTrackingId();
+});
+
+// =================== Crash Reporting ====================
+SettingsListener.observe('app.reportCrashes', 'ask', function(value) {
+  if (value == 'always') {
+    Services.prefs.setBoolPref('app.reportCrashes', true);
+  } else if (value == 'never') {
+    Services.prefs.setBoolPref('app.reportCrashes', false);
+  } else {
+    Services.prefs.clearUserPref('app.reportCrashes');
+  }
+  // This preference is consulted during startup.
+  Services.prefs.savePrefFile(null);
+});
+
+// ================ Updates ================
+/**
+ * For tracking purposes some partners require us to add an UUID to the
+ * update URL. The update tracking ID will be an empty string if the
+ * do-not-track feature specifically disallows tracking and it is reseted
+ * to a different ID if the do-not-track value changes from disallow to allow.
+ */
+function setUpdateTrackingId() {
+  try {
+    let dntEnabled = Services.prefs.getBoolPref('privacy.donottrackheader.enabled');
+    let dntValue =  Services.prefs.getIntPref('privacy.donottrackheader.value');
+    // If the user specifically decides to disallow tracking (1), we just bail out.
+    if (dntEnabled && (dntValue == 1)) {
+      return;
+    }
+
+    let trackingId =
+      Services.prefs.getPrefType('app.update.custom') ==
+      Ci.nsIPrefBranch.PREF_STRING &&
+      Services.prefs.getCharPref('app.update.custom');
+
+    // If there is no previous registered tracking ID, we generate a new one.
+    // This should only happen on first usage or after changing the
+    // do-not-track value from disallow to allow.
+    if (!trackingId) {
+      trackingId = uuidgen.generateUUID().toString().replace(/[{}]/g, "");
+      Services.prefs.setCharPref('app.update.custom', trackingId);
+    }
+  } catch(e) {
+    dump('Error getting tracking ID ' + e + '\n');
+  }
+}
+setUpdateTrackingId();
+
+(function syncUpdatePrefs() {
+  // The update service reads the prefs from the default branch. This is by
+  // design, as explained in bug 302721 comment 43. If we are to successfully
+  // modify them, that's where we need to make our changes.
+  let defaultBranch = Services.prefs.getDefaultBranch(null);
+
+  function syncPrefDefault(prefName) {
+    // The pref value at boot-time will serve as default for the setting.
+    let defaultValue = defaultBranch.getCharPref(prefName);
+    let defaultSetting = {};
+    defaultSetting[prefName] = defaultValue;
+
+    // We back up that value in order to detect pref changes across reboots.
+    // Such a change can happen e.g. when the user installs an OTA update that
+    // changes the update URL format.
+    let backupName = prefName + '.old';
+    try {
+      // Everything relies on the comparison below: When pushing a new Gecko
+      // that changes app.update.url or app.update.channel, we overwrite any
+      // existing setting with the new pref value.
+      let backupValue = Services.prefs.getCharPref(backupName);
+      if (defaultValue !== backupValue) {
+        // If the pref has changed since our last backup, overwrite the setting.
+        navigator.mozSettings.createLock().set(defaultSetting);
+      }
+    } catch(e) {
+      // There was no backup: Overwrite the setting and create a backup below.
+      navigator.mozSettings.createLock().set(defaultSetting);
+    }
+
+    // Initialize or update the backup value.
+    Services.prefs.setCharPref(backupName, defaultValue);
+
+    // Propagate setting changes to the pref.
+    SettingsListener.observe(prefName, defaultValue, value => {
+      if (!value) {
+        // If the setting value is invalid, reset it to its default.
+        navigator.mozSettings.createLock().set(defaultSetting);
+        return;
+      }
+      // Here we will overwrite the pref with the setting value.
+      defaultBranch.setCharPref(prefName, value);
+    });
+  }
+
+  syncPrefDefault('app.update.url');
+  syncPrefDefault('app.update.channel');
+})();
+
+// ================ Debug ================
+(function Composer2DSettingToPref() {
+  //layers.composer.enabled can be enabled in three ways
+  //In order of precedence they are:
+  //
+  //1. mozSettings "layers.composer.enabled"
+  //2. a gecko pref "layers.composer.enabled"
+  //3. presence of ro.display.colorfill at the Gonk level
+
+  var req = navigator.mozSettings.createLock().get('layers.composer2d.enabled');
+  req.onsuccess = function() {
+    if (typeof(req.result['layers.composer2d.enabled']) === 'undefined') {
+      var enabled = false;
+      if (Services.prefs.getPrefType('layers.composer2d.enabled') == Ci.nsIPrefBranch.PREF_BOOL) {
+        enabled = Services.prefs.getBoolPref('layers.composer2d.enabled');
+      } else if (isGonk) {
+        let androidVersion = libcutils.property_get("ro.build.version.sdk");
+        if (androidVersion >= 17 ) {
+          enabled = true;
+        } else {
+          enabled = (libcutils.property_get('ro.display.colorfill') === '1');
+        }
+      }
+      navigator.mozSettings.createLock().set({'layers.composer2d.enabled': enabled });
+    }
+
+    SettingsListener.observe("layers.composer2d.enabled", true, function(value) {
+      Services.prefs.setBoolPref("layers.composer2d.enabled", value);
+    });
+  };
+  req.onerror = function() {
+    dump("Error configuring layers.composer2d.enabled setting");
+  };
+
+})();
+
+// ================ Accessibility ============
+(function setupAccessibility() {
+  let accessibilityScope = {};
+  SettingsListener.observe("accessibility.screenreader", false, function(value) {
+    if (!value) {
+      return;
+    }
+    if (!('AccessFu' in accessibilityScope)) {
+      Cu.import('resource://gre/modules/accessibility/AccessFu.jsm',
+                accessibilityScope);
+      accessibilityScope.AccessFu.attach(window);
+    }
+  });
+})();
+
+// ================ Theming ============
+(function themingSettingsListener() {
+  let themingPrefs = ['ui.menu', 'ui.menutext', 'ui.infobackground', 'ui.infotext',
+                      'ui.window', 'ui.windowtext', 'ui.highlight'];
+
+  themingPrefs.forEach(function(pref) {
+    SettingsListener.observe('gaia.' + pref, null, function(value) {
+      if (value) {
+        Services.prefs.setCharPref(pref, value);
+      }
+    });
+  });
+})();
+
+// =================== Telemetry  ======================
+(function setupTelemetrySettings() {
+  let gaiaSettingName = 'debug.performance_data.shared';
+  let geckoPrefName = 'toolkit.telemetry.enabled';
+  SettingsListener.observe(gaiaSettingName, null, function(value) {
+    if (value !== null) {
+      // Gaia setting has been set; update Gecko pref to that.
+      Services.prefs.setBoolPref(geckoPrefName, value);
+      return;
+    }
+    // Gaia setting has not been set; set the gaia setting to default.
+    let prefValue = AppConstants.MOZ_TELEMETRY_ON_BY_DEFAULT;
+    try {
+      prefValue = Services.prefs.getBoolPref(geckoPrefName);
+    } catch (e) {
+      // Pref not set; use default value.
+    }
+    let setting = {};
+    setting[gaiaSettingName] = prefValue;
+    window.navigator.mozSettings.createLock().set(setting);
+  });
+})();
+
+// =================== Low-precision buffer ======================
+(function setupLowPrecisionSettings() {
+  // The gaia setting layers.low-precision maps to two gecko prefs
+  SettingsListener.observe('layers.low-precision', null, function(value) {
+    if (value !== null) {
+      // Update gecko from the new Gaia setting
+      Services.prefs.setBoolPref('layers.low-precision-buffer', value);
+      Services.prefs.setBoolPref('layers.progressive-paint', value);
+    } else {
+      // Update gaia setting from gecko value
+      try {
+        let prefValue = Services.prefs.getBoolPref('layers.low-precision-buffer');
+        let setting = { 'layers.low-precision': prefValue };
+        window.navigator.mozSettings.createLock().set(setting);
+      } catch (e) {
+        console.log('Unable to read pref layers.low-precision-buffer: ' + e);
+      }
+    }
+  });
+
+  // The gaia setting layers.low-opacity maps to a string gecko pref (0.5/1.0)
+  SettingsListener.observe('layers.low-opacity', null, function(value) {
+    if (value !== null) {
+      // Update gecko from the new Gaia setting
+      Services.prefs.setCharPref('layers.low-precision-opacity', value ? '0.5' : '1.0');
+    } else {
+      // Update gaia setting from gecko value
+      try {
+        let prefValue = Services.prefs.getCharPref('layers.low-precision-opacity');
+        let setting = { 'layers.low-opacity': (prefValue == '0.5') };
+        window.navigator.mozSettings.createLock().set(setting);
+      } catch (e) {
+        console.log('Unable to read pref layers.low-precision-opacity: ' + e);
+      }
+    }
+  });
+})();
+
+// ======================= Dogfooders FOTA ==========================
+if (AppConstants.MOZ_B2G_RIL) {
+  XPCOMUtils.defineLazyModuleGetter(this, "AppsUtils",
+                                    "resource://gre/modules/AppsUtils.jsm");
+
+  SettingsListener.observe('debug.performance_data.dogfooding', false,
+    isDogfooder => {
+      if (!isDogfooder) {
+        dump('AUS:Settings: Not a dogfooder!\n');
+        return;
+      }
+
+      if (!('mozTelephony' in navigator)) {
+        dump('AUS:Settings: There is no mozTelephony!\n');
+        return;
+      }
+
+      if (!('mozMobileConnections' in navigator)) {
+        dump('AUS:Settings: There is no mozMobileConnections!\n');
+        return;
+      }
+
+      let conn = navigator.mozMobileConnections[0];
+      conn.addEventListener('radiostatechange', function onradiostatechange() {
+        if (conn.radioState !== 'enabled') {
+          return;
+        }
+
+        conn.removeEventListener('radiostatechange', onradiostatechange);
+        navigator.mozTelephony.dial('*#06#').then(call => {
+          return call.result.then(res => {
+            if (res.success && res.statusMessage
+                && (res.serviceCode === 'scImei')) {
+              Services.prefs.setCharPref("app.update.imei_hash",
+                                         AppsUtils.computeHash(res.statusMessage, "SHA512"));
+            }
+          });
+        });
+      });
+    });
+}
+
+// =================== Various simple mapping  ======================
+var settingsToObserve = {
+  'accessibility.screenreader_quicknav_modes': {
+    prefName: 'accessibility.accessfu.quicknav_modes',
+    resetToPref: true,
+    defaultValue: ''
+  },
+  'accessibility.screenreader_quicknav_index': {
+    prefName: 'accessibility.accessfu.quicknav_index',
+    resetToPref: true,
+    defaultValue: 0
+  },
+  'app.update.interval': 86400,
+  'apz.overscroll.enabled': true,
+  'browser.safebrowsing.phishing.enabled': true,
+  'browser.safebrowsing.malware.enabled': true,
+  'debug.fps.enabled': {
+    prefName: 'layers.acceleration.draw-fps',
+    defaultValue: false
+  },
+  'debug.log-animations.enabled': {
+    prefName: 'layers.offmainthreadcomposition.log-animations',
+    defaultValue: false
+  },
+  'debug.paint-flashing.enabled': {
+    prefName: 'nglayout.debug.paint_flashing',
+    defaultValue: false
+  },
+  // FIXME: Bug 1185806 - Provide a common device name setting.
+  // Borrow device name from developer's menu to avoid multiple name settings.
+  'devtools.discovery.device': {
+    prefName: 'dom.presentation.device.name',
+    defaultValue: 'Firefox OS'
+  },
+  'devtools.eventlooplag.threshold': 100,
+  'devtools.remote.wifi.visible': {
+    resetToPref: true
+  },
+  'devtools.telemetry.supported_performance_marks': {
+    resetToPref: true
+  },
+
+  'dom.presentation.discovery.enabled': false,
+  'dom.presentation.discoverable': false,
+  'dom.serviceWorkers.testing.enabled': false,
+  'gfx.layerscope.enabled': false,
+  'layers.draw-borders': false,
+  'layers.draw-tile-borders': false,
+  'layers.dump': false,
+  'layers.enable-tiles': AppConstants.platform !== "win",
+  'layers.enable-tiles': true,
+  'layers.effect.invert': false,
+  'layers.effect.grayscale': false,
+  'layers.effect.contrast': '0.0',
+  'layout.display-list.dump': false,
+  'mms.debugging.enabled': false,
+  'network.debugging.enabled': false,
+  'privacy.donottrackheader.enabled': false,
+  'privacy.trackingprotection.enabled': false,
+  'ril.debugging.enabled': false,
+  'ril.radio.disabled': false,
+  'ril.mms.requestReadReport.enabled': {
+    prefName: 'dom.mms.requestReadReport',
+    defaultValue: true
+  },
+  'ril.mms.requestStatusReport.enabled': {
+    prefName: 'dom.mms.requestStatusReport',
+    defaultValue: false
+  },
+  'ril.mms.retrieval_mode': {
+    prefName: 'dom.mms.retrieval_mode',
+    defaultValue: 'manual'
+  },
+  'ril.sms.requestStatusReport.enabled': {
+    prefName: 'dom.sms.requestStatusReport',
+    defaultValue: false
+  },
+  'ril.sms.strict7BitEncoding.enabled': {
+    prefName: 'dom.sms.strict7BitEncoding',
+    defaultValue: false
+  },
+  'ril.sms.maxReadAheadEntries': {
+    prefName: 'dom.sms.maxReadAheadEntries',
+    defaultValue: 7
+  },
+  'services.sync.enabled': {
+    defaultValue: false,
+    notifyChange: true
+  },
+  'ui.touch.radius.leftmm': {
+    resetToPref: true
+  },
+  'ui.touch.radius.topmm': {
+    resetToPref: true
+  },
+  'ui.touch.radius.rightmm': {
+    resetToPref: true
+  },
+  'ui.touch.radius.bottommm': {
+    resetToPref: true
+  },
+  'ui.click_hold_context_menus.delay': {
+    resetToPref: true
+  },
+  'wap.UAProf.tagname': 'x-wap-profile',
+  'wap.UAProf.url': ''
+};
+
+if (AppConstants.MOZ_GRAPHENE) {
+  // Restart required
+  settingsToObserve['layers.async-pan-zoom.enabled'] = false;
+}
+
+function settingObserver(setPref, prefName, setting) {
+  return value => {
+    setPref(prefName, value);
+    if (setting.notifyChange) {
+      SystemAppProxy._sendCustomEvent('mozPrefChromeEvent', {
+        prefName: prefName,
+        value: value
+      });
+    }
+  };
+}
+
+for (let key in settingsToObserve) {
+  let setting = settingsToObserve[key];
+
+  // Allow setting to contain flags redefining prefName and defaultValue.
+  let prefName = setting.prefName || key;
+  let defaultValue = setting.defaultValue;
+  if (defaultValue === undefined) {
+    defaultValue = setting;
+  }
+
+  let prefs = Services.prefs;
+
+  // If requested, reset setting value and defaultValue to the pref value.
+  if (setting.resetToPref) {
+    switch (prefs.getPrefType(prefName)) {
+      case Ci.nsIPrefBranch.PREF_BOOL:
+        defaultValue = prefs.getBoolPref(prefName);
+        break;
+
+      case Ci.nsIPrefBranch.PREF_INT:
+        defaultValue = prefs.getIntPref(prefName);
+        break;
+
+      case Ci.nsIPrefBranch.PREF_STRING:
+        defaultValue = prefs.getCharPref(prefName);
+        break;
+    }
+
+    let setting = {};
+    setting[key] = defaultValue;
+    window.navigator.mozSettings.createLock().set(setting);
+  }
+
+  // Figure out the right setter function for this type of pref.
+  let setPref;
+  switch (typeof defaultValue) {
+    case 'boolean':
+      setPref = prefs.setBoolPref.bind(prefs);
+      break;
+
+    case 'number':
+      setPref = prefs.setIntPref.bind(prefs);
+      break;
+
+    case 'string':
+      setPref = prefs.setCharPref.bind(prefs);
+      break;
+  }
+
+  SettingsListener.observe(key, defaultValue,
+                           settingObserver(setPref, prefName, setting));
+};
diff --git a/b2g/chrome/content/shell.css b/b2g/chrome/content/shell.css
new file mode 100644
index 000000000..34daafd99
--- /dev/null
+++ b/b2g/chrome/content/shell.css
@@ -0,0 +1,81 @@
+/* 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/. */
+
+html {
+  background: black;
+  overflow: hidden;
+  width: 100%;
+  height: 100%;
+  padding: 0 !important;
+}
+body {
+  margin: 0;
+  width: 100%;
+  height: 100%;
+  overflow: hidden;
+}
+iframe {
+  overflow: hidden;
+  height: 100%;
+  width: 100%;
+  border: none;
+  position: absolute;
+  left: 0;
+  top: 0;
+  right: 0;
+  bottom: 0;
+  z-index: 1;
+  -moz-user-select: none;
+}
+
+%ifdef MOZ_GRAPHENE
+
+body.content-loaded > #installing {
+  display: none;
+}
+
+#installing {
+  z-index: 2;
+  position: absolute;
+  left: 0;
+  top: 0;
+  right: 0;
+  bottom: 0;
+  width: 100%;
+  height: 100%;
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  background-color: #F1C40F;
+  color: #FFF;
+}
+
+.throbber {
+  width: 3px;
+  height: 3px;
+  border-radius: 100px;
+  background-color: #FFF;
+  animation-name: throbber;
+  animation-duration: 1500ms;
+  animation-iteration-count: infinite;
+  animation-timing-function: linear;
+}
+
+#titlebar-buttonbox {
+  margin: 6px 7px;
+  -moz-appearance: -moz-window-button-box;
+}
+
+@keyframes throbber{
+  from {
+    transform: scale(0);
+    opacity: 0.4;
+  }
+  to {
+    transform: scale(400);
+    opacity: 0;
+  }
+}
+
+%endif
diff --git a/b2g/chrome/content/shell.html b/b2g/chrome/content/shell.html
new file mode 100644
index 000000000..5507a65aa
--- /dev/null
+++ b/b2g/chrome/content/shell.html
@@ -0,0 +1,66 @@
+<!DOCTYPE html>
+<!-- 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/.  -->
+
+<html xmlns="http://www.w3.org/1999/xhtml"
+      id="shell"
+      windowtype="navigator:browser"
+#ifdef ANDROID
+      sizemode="fullscreen"
+#endif
+#ifdef MOZ_GRAPHENE
+      macanimationtype="document"
+      fullscreenbutton="true"
+      chromemargin="0,0,0,0"
+#endif
+      >
+
+<head>
+  <link rel="stylesheet" href="shell.css" type="text/css">
+  <script type="text/javascript">
+  <!-- Add raptor performance marker -->
+  window.performance.mark('gecko-shell-html-load');
+  </script>
+  <script type="application/javascript;version=1.8"
+          src="chrome://b2g/content/settings.js"> </script>
+  <script type="application/javascript;version=1.8"
+          src="chrome://b2g/content/shell.js"> </script>
+
+#ifndef ANDROID
+#ifndef MOZ_GRAPHENE
+  <!-- various task that has to happen only on desktop -->
+  <script type="application/javascript;version=1.8"
+          src="chrome://b2g/content/desktop.js"> </script>
+  <!-- this script handles the screen argument for desktop builds -->
+  <script type="application/javascript;version=1.8"
+          src="chrome://b2g/content/screen.js"> </script>
+#endif
+#else
+  <!-- this file is only loaded on Gonk to manage ADB state -->
+  <script type="application/javascript;version=1.8"
+          src="chrome://b2g/content/devtools/adb.js"> </script>
+#endif
+  <!-- manages DevTools server state -->
+  <script type="application/javascript;version=1.8"
+          src="chrome://b2g/content/devtools/debugger.js"> </script>
+</head>
+  <body id="container">
+#ifndef MOZ_GRAPHENE
+#ifdef MOZ_WIDGET_COCOA
+    <!--
+     If the document is empty at startup, we don't display the window
+     at all on Mac OS...
+    -->
+    <h1 id="placeholder">wtf mac os!</h1>
+#endif
+#else
+    <div id="titlebar-buttonbox"></div>
+    <div id="installing">
+      <div class="throbber"></div>
+      <div class="message"></div>
+    </div>
+#endif
+    <!-- The html:iframe containing the UI is created here. -->
+  </body>
+</html>
diff --git a/b2g/chrome/content/shell.js b/b2g/chrome/content/shell.js
new file mode 100644
index 000000000..d483f9a64
--- /dev/null
+++ b/b2g/chrome/content/shell.js
@@ -0,0 +1,1308 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- /
+/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* 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/. */
+
+window.performance.mark('gecko-shell-loadstart');
+
+Cu.import('resource://gre/modules/NotificationDB.jsm');
+Cu.import("resource://gre/modules/AppsUtils.jsm");
+Cu.import('resource://gre/modules/UserAgentOverrides.jsm');
+Cu.import('resource://gre/modules/Keyboard.jsm');
+Cu.import('resource://gre/modules/ErrorPage.jsm');
+Cu.import('resource://gre/modules/AlertsHelper.jsm');
+Cu.import('resource://gre/modules/SystemUpdateService.jsm');
+
+if (isGonk) {
+  Cu.import('resource://gre/modules/NetworkStatsService.jsm');
+  Cu.import('resource://gre/modules/ResourceStatsService.jsm');
+}
+
+// Identity
+Cu.import('resource://gre/modules/SignInToWebsite.jsm');
+SignInToWebsiteController.init();
+
+Cu.import('resource://gre/modules/FxAccountsMgmtService.jsm');
+Cu.import('resource://gre/modules/DownloadsAPI.jsm');
+Cu.import('resource://gre/modules/PresentationDeviceInfoManager.jsm');
+Cu.import('resource://gre/modules/AboutServiceWorkers.jsm');
+
+XPCOMUtils.defineLazyModuleGetter(this, "SystemAppProxy",
+                                  "resource://gre/modules/SystemAppProxy.jsm");
+
+XPCOMUtils.defineLazyModuleGetter(this, "Screenshot",
+                                  "resource://gre/modules/Screenshot.jsm");
+
+XPCOMUtils.defineLazyServiceGetter(Services, 'env',
+                                   '@mozilla.org/process/environment;1',
+                                   'nsIEnvironment');
+
+XPCOMUtils.defineLazyServiceGetter(Services, 'ss',
+                                   '@mozilla.org/content/style-sheet-service;1',
+                                   'nsIStyleSheetService');
+
+XPCOMUtils.defineLazyServiceGetter(this, 'gSystemMessenger',
+                                   '@mozilla.org/system-message-internal;1',
+                                   'nsISystemMessagesInternal');
+
+XPCOMUtils.defineLazyGetter(this, "ppmm", function() {
+  return Cc["@mozilla.org/parentprocessmessagemanager;1"]
+         .getService(Ci.nsIMessageListenerManager);
+});
+
+if (isGonk) {
+  XPCOMUtils.defineLazyGetter(this, "libcutils", function () {
+    Cu.import("resource://gre/modules/systemlibs.js");
+    return libcutils;
+  });
+}
+
+XPCOMUtils.defineLazyServiceGetter(Services, 'captivePortalDetector',
+                                  '@mozilla.org/toolkit/captive-detector;1',
+                                  'nsICaptivePortalDetector');
+
+XPCOMUtils.defineLazyModuleGetter(this, "SafeBrowsing",
+              "resource://gre/modules/SafeBrowsing.jsm");
+
+XPCOMUtils.defineLazyModuleGetter(this, "SafeMode",
+                                  "resource://gre/modules/SafeMode.jsm");
+
+window.performance.measure('gecko-shell-jsm-loaded', 'gecko-shell-loadstart');
+
+function debug(str) {
+  dump(' -*- Shell.js: ' + str + '\n');
+}
+
+const once = event => {
+  let target = shell.contentBrowser;
+  return new Promise((resolve, reject) => {
+    target.addEventListener(event, function gotEvent(evt) {
+      target.removeEventListener(event, gotEvent, false);
+      resolve(evt);
+    }, false);
+  });
+}
+
+function clearCache() {
+  let cache = Cc["@mozilla.org/netwerk/cache-storage-service;1"]
+                .getService(Ci.nsICacheStorageService);
+  cache.clear();
+}
+
+function clearCacheAndReload() {
+  // Reload the main frame with a cleared cache.
+  debug('Reloading ' + shell.contentBrowser.contentWindow.location);
+  clearCache();
+  shell.contentBrowser.contentWindow.location.reload(true);
+  once('mozbrowserlocationchange').then(
+    evt => {
+      shell.sendEvent(window, "ContentStart");
+    });
+}
+
+function restart() {
+  let appStartup = Cc['@mozilla.org/toolkit/app-startup;1']
+                     .getService(Ci.nsIAppStartup);
+  appStartup.quit(Ci.nsIAppStartup.eForceQuit | Ci.nsIAppStartup.eRestart);
+}
+
+function debugCrashReport(aStr) {
+  AppConstants.MOZ_CRASHREPORTER && dump('Crash reporter : ' + aStr);
+}
+
+var shell = {
+
+  get CrashSubmit() {
+    delete this.CrashSubmit;
+    if (AppConstants.MOZ_CRASHREPORTER) {
+      Cu.import("resource://gre/modules/CrashSubmit.jsm", this);
+      return this.CrashSubmit;
+    } else {
+      dump('Crash reporter : disabled at build time.');
+      return this.CrashSubmit = null;
+    }
+  },
+
+  onlineForCrashReport: function shell_onlineForCrashReport() {
+    let wifiManager = navigator.mozWifiManager;
+    let onWifi = (wifiManager &&
+                  (wifiManager.connection.status == 'connected'));
+    return !Services.io.offline && onWifi;
+  },
+
+  reportCrash: function shell_reportCrash(isChrome, aCrashID) {
+    let crashID = aCrashID;
+    try {
+      // For chrome crashes, we want to report the lastRunCrashID.
+      if (isChrome) {
+        crashID = Cc["@mozilla.org/xre/app-info;1"]
+                    .getService(Ci.nsIXULRuntime).lastRunCrashID;
+      }
+    } catch(e) {
+      debugCrashReport('Failed to fetch crash id. Crash ID is "' + crashID
+                       + '" Exception: ' + e);
+    }
+
+    // Bail if there isn't a valid crashID.
+    if (!this.CrashSubmit || !crashID && !this.CrashSubmit.pendingIDs().length) {
+      return;
+    }
+
+    // purge the queue.
+    this.CrashSubmit.pruneSavedDumps();
+
+    // check for environment affecting crash reporting
+    let env = Cc["@mozilla.org/process/environment;1"]
+                .getService(Ci.nsIEnvironment);
+    let shutdown = env.get("MOZ_CRASHREPORTER_SHUTDOWN");
+    if (shutdown) {
+      let appStartup = Cc["@mozilla.org/toolkit/app-startup;1"]
+                         .getService(Ci.nsIAppStartup);
+      appStartup.quit(Ci.nsIAppStartup.eForceQuit);
+    }
+
+    let noReport = env.get("MOZ_CRASHREPORTER_NO_REPORT");
+    if (noReport) {
+      return;
+    }
+
+    try {
+      // Check if we should automatically submit this crash.
+      if (Services.prefs.getBoolPref('app.reportCrashes')) {
+        this.submitCrash(crashID);
+      } else {
+        this.deleteCrash(crashID);
+      }
+    } catch (e) {
+      debugCrashReport('Can\'t fetch app.reportCrashes. Exception: ' + e);
+    }
+
+    // We can get here if we're just submitting old pending crashes.
+    // Check that there's a valid crashID so that we only notify the
+    // user if a crash just happened and not when we OOM. Bug 829477
+    if (crashID) {
+      this.sendChromeEvent({
+        type: "handle-crash",
+        crashID: crashID,
+        chrome: isChrome
+      });
+    }
+  },
+
+  deleteCrash: function shell_deleteCrash(aCrashID) {
+    if (aCrashID) {
+      debugCrashReport('Deleting pending crash: ' + aCrashID);
+      shell.CrashSubmit.delete(aCrashID);
+    }
+  },
+
+  // this function submit the pending crashes.
+  // make sure you are online.
+  submitQueuedCrashes: function shell_submitQueuedCrashes() {
+    // submit the pending queue.
+    let pending = shell.CrashSubmit.pendingIDs();
+    for (let crashid of pending) {
+      debugCrashReport('Submitting crash: ' + crashid);
+      shell.CrashSubmit.submit(crashid);
+    }
+  },
+
+  // This function submits a crash when we're online.
+  submitCrash: function shell_submitCrash(aCrashID) {
+    if (this.onlineForCrashReport()) {
+      this.submitQueuedCrashes();
+      return;
+    }
+
+    debugCrashReport('Not online, postponing.');
+
+    Services.obs.addObserver(function observer(subject, topic, state) {
+      let network = subject.QueryInterface(Ci.nsINetworkInfo);
+      if (network.state == Ci.nsINetworkInfo.NETWORK_STATE_CONNECTED
+          && network.type == Ci.nsINetworkInfo.NETWORK_TYPE_WIFI) {
+        shell.submitQueuedCrashes();
+
+        Services.obs.removeObserver(observer, topic);
+      }
+    }, "network-connection-state-changed", false);
+  },
+
+  get homeURL() {
+    try {
+      let homeSrc = Services.env.get('B2G_HOMESCREEN');
+      if (homeSrc)
+        return homeSrc;
+    } catch (e) {}
+
+    return Services.prefs.getCharPref('b2g.system_startup_url');
+  },
+
+  get manifestURL() {
+    return Services.prefs.getCharPref('b2g.system_manifest_url');
+  },
+
+  _started: false,
+  hasStarted: function shell_hasStarted() {
+    return this._started;
+  },
+
+  bootstrap: function() {
+    window.performance.mark('gecko-shell-bootstrap');
+
+    // Before anything, check if we want to start in safe mode.
+    SafeMode.check(window).then(() => {
+      let startManifestURL =
+        Cc['@mozilla.org/commandlinehandler/general-startup;1?type=b2gbootstrap']
+          .getService(Ci.nsISupports).wrappedJSObject.startManifestURL;
+
+      // If --start-manifest hasn't been specified, we re-use the latest specified manifest.
+      // If it's the first launch, we will fallback to b2g.default.start_manifest_url
+      if (AppConstants.MOZ_GRAPHENE && !startManifestURL) {
+        try {
+          startManifestURL = Services.prefs.getCharPref("b2g.system_manifest_url");
+        } catch(e) {}
+      }
+
+      if (!startManifestURL) {
+        try {
+          startManifestURL = Services.prefs.getCharPref("b2g.default.start_manifest_url");
+        } catch(e) {}
+      }
+
+      if (startManifestURL) {
+        Cu.import('resource://gre/modules/Bootstraper.jsm');
+
+        if (AppConstants.MOZ_GRAPHENE && Bootstraper.isInstallRequired(startManifestURL)) {
+          // Installing the app my take some time. We don't want to keep the
+          // native window hidden.
+          showInstallScreen();
+        }
+
+        Bootstraper.ensureSystemAppInstall(startManifestURL)
+                   .then(this.start.bind(this))
+                   .catch(Bootstraper.bailout);
+      } else {
+        this.start();
+      }
+    });
+  },
+
+  start: function shell_start() {
+    window.performance.mark('gecko-shell-start');
+    this._started = true;
+
+    // This forces the initialization of the cookie service before we hit the
+    // network.
+    // See bug 810209
+    let cookies = Cc["@mozilla.org/cookieService;1"];
+
+    try {
+      let cr = Cc["@mozilla.org/xre/app-info;1"]
+                 .getService(Ci.nsICrashReporter);
+      // Dogfood id. We might want to remove it in the future.
+      // see bug 789466
+      try {
+        let dogfoodId = Services.prefs.getCharPref('prerelease.dogfood.id');
+        if (dogfoodId != "") {
+          cr.annotateCrashReport("Email", dogfoodId);
+        }
+      }
+      catch (e) { }
+
+      if (isGonk) {
+        // Annotate crash report
+        let annotations = [ [ "Android_Hardware",     "ro.hardware" ],
+                            [ "Android_Device",       "ro.product.device" ],
+                            [ "Android_CPU_ABI2",     "ro.product.cpu.abi2" ],
+                            [ "Android_CPU_ABI",      "ro.product.cpu.abi" ],
+                            [ "Android_Manufacturer", "ro.product.manufacturer" ],
+                            [ "Android_Brand",        "ro.product.brand" ],
+                            [ "Android_Model",        "ro.product.model" ],
+                            [ "Android_Board",        "ro.product.board" ],
+          ];
+
+        annotations.forEach(function (element) {
+            cr.annotateCrashReport(element[0], libcutils.property_get(element[1]));
+          });
+
+        let androidVersion = libcutils.property_get("ro.build.version.sdk") +
+                             "(" + libcutils.property_get("ro.build.version.codename") + ")";
+        cr.annotateCrashReport("Android_Version", androidVersion);
+
+        SettingsListener.observe("deviceinfo.os", "", function(value) {
+          try {
+            let cr = Cc["@mozilla.org/xre/app-info;1"]
+                       .getService(Ci.nsICrashReporter);
+            cr.annotateCrashReport("B2G_OS_Version", value);
+          } catch(e) { }
+        });
+      }
+    } catch(e) {
+      debugCrashReport('exception: ' + e);
+    }
+
+    let homeURL = this.homeURL;
+    if (!homeURL) {
+      let msg = 'Fatal error during startup: No homescreen found: try setting B2G_HOMESCREEN';
+      alert(msg);
+      return;
+    }
+
+    let manifestURL = this.manifestURL;
+    // <html:iframe id="systemapp"
+    //              mozbrowser="true" allowfullscreen="true"
+    //              style="overflow: hidden; height: 100%; width: 100%; border: none;"
+    //              src="data:text/html;charset=utf-8,%3C!DOCTYPE html>%3Cbody style='background:black;'>"/>
+    let systemAppFrame =
+      document.createElementNS('http://www.w3.org/1999/xhtml', 'html:iframe');
+    systemAppFrame.setAttribute('id', 'systemapp');
+    systemAppFrame.setAttribute('mozbrowser', 'true');
+    systemAppFrame.setAttribute('mozapp', manifestURL);
+    systemAppFrame.setAttribute('allowfullscreen', 'true');
+    systemAppFrame.setAttribute('src', 'blank.html');
+    let container = document.getElementById('container');
+
+    if (AppConstants.platform == 'macosx') {
+      // See shell.html
+      let hotfix = document.getElementById('placeholder');
+      if (hotfix) {
+        container.removeChild(hotfix);
+      }
+    }
+
+    this.contentBrowser = container.appendChild(systemAppFrame);
+
+    let webNav = systemAppFrame.contentWindow
+                               .QueryInterface(Ci.nsIInterfaceRequestor)
+                               .getInterface(Ci.nsIWebNavigation);
+    webNav.sessionHistory = Cc["@mozilla.org/browser/shistory;1"].createInstance(Ci.nsISHistory);
+
+    if (AppConstants.MOZ_GRAPHENE) {
+      webNav.QueryInterface(Ci.nsIDocShell).windowDraggingAllowed = true;
+    }
+
+    let audioChannels = systemAppFrame.allowedAudioChannels;
+    audioChannels && audioChannels.forEach(function(audioChannel) {
+      // Set all audio channels as unmuted by default
+      // because some audio in System app will be played
+      // before AudioChannelService[1] is Gaia is loaded.
+      // [1]: https://github.com/mozilla-b2g/gaia/blob/master/apps/system/js/audio_channel_service.js
+      audioChannel.setMuted(false);
+    });
+
+    // On firefox mulet, shell.html is loaded in a tab
+    // and we have to listen on the chrome event handler
+    // to catch key events
+    let chromeEventHandler = window.QueryInterface(Ci.nsIInterfaceRequestor)
+                                   .getInterface(Ci.nsIWebNavigation)
+                                   .QueryInterface(Ci.nsIDocShell)
+                                   .chromeEventHandler || window;
+    // Capture all key events so we can filter out hardware buttons
+    // And send them to Gaia via mozChromeEvents.
+    // Ideally, hardware buttons wouldn't generate key events at all, or
+    // if they did, they would use keycodes that conform to DOM 3 Events.
+    // See discussion in https://bugzilla.mozilla.org/show_bug.cgi?id=762362
+    chromeEventHandler.addEventListener('keydown', this, true);
+    chromeEventHandler.addEventListener('keyup', this, true);
+
+    window.addEventListener('MozApplicationManifest', this);
+    window.addEventListener('MozAfterPaint', this);
+    window.addEventListener('sizemodechange', this);
+    window.addEventListener('unload', this);
+    this.contentBrowser.addEventListener('mozbrowserloadstart', this, true);
+    this.contentBrowser.addEventListener('mozbrowserscrollviewchange', this, true);
+    this.contentBrowser.addEventListener('mozbrowsercaretstatechanged', this);
+
+    CustomEventManager.init();
+    UserAgentOverrides.init();
+    CaptivePortalLoginHelper.init();
+
+    this.contentBrowser.src = homeURL;
+
+    this._isEventListenerReady = false;
+
+    window.performance.mark('gecko-shell-system-frame-set');
+
+    ppmm.addMessageListener("content-handler", this);
+    ppmm.addMessageListener("dial-handler", this);
+    ppmm.addMessageListener("sms-handler", this);
+    ppmm.addMessageListener("mail-handler", this);
+    ppmm.addMessageListener("file-picker", this);
+
+    setTimeout(function() {
+      SafeBrowsing.init();
+    }, 5000);
+  },
+
+  stop: function shell_stop() {
+    window.removeEventListener('unload', this);
+    window.removeEventListener('keydown', this, true);
+    window.removeEventListener('keyup', this, true);
+    window.removeEventListener('MozApplicationManifest', this);
+    window.removeEventListener('sizemodechange', this);
+    this.contentBrowser.removeEventListener('mozbrowserloadstart', this, true);
+    this.contentBrowser.removeEventListener('mozbrowserscrollviewchange', this, true);
+    this.contentBrowser.removeEventListener('mozbrowsercaretstatechanged', this);
+    ppmm.removeMessageListener("content-handler", this);
+
+    UserAgentOverrides.uninit();
+  },
+
+  // If this key event represents a hardware button which needs to be send as
+  // a message, broadcasts it with the message set to 'xxx-button-press' or
+  // 'xxx-button-release'.
+  broadcastHardwareKeys: function shell_broadcastHardwareKeys(evt) {
+    let type;
+    let message;
+
+    let mediaKeys = {
+      'MediaTrackNext': 'media-next-track-button',
+      'MediaTrackPrevious': 'media-previous-track-button',
+      'MediaPause': 'media-pause-button',
+      'MediaPlay': 'media-play-button',
+      'MediaPlayPause': 'media-play-pause-button',
+      'MediaStop': 'media-stop-button',
+      'MediaRewind': 'media-rewind-button',
+      'MediaFastForward': 'media-fast-forward-button'
+    };
+
+    if (evt.keyCode == evt.DOM_VK_F1) {
+      type = 'headset-button';
+      message = 'headset-button';
+    } else if (mediaKeys[evt.key]) {
+      type = 'media-button';
+      message = mediaKeys[evt.key];
+    } else {
+      return;
+    }
+
+    switch (evt.type) {
+      case 'keydown':
+        message = message + '-press';
+        break;
+      case 'keyup':
+        message = message + '-release';
+        break;
+    }
+
+    // Let applications receive the headset button and media key press/release message.
+    if (message !== this.lastHardwareButtonMessage) {
+      this.lastHardwareButtonMessage = message;
+      gSystemMessenger.broadcastMessage(type, message);
+    }
+  },
+
+  lastHardwareButtonMessage: null, // property for the hack above
+  visibleNormalAudioActive: false,
+
+  handleEvent: function shell_handleEvent(evt) {
+    function checkReloadKey() {
+      if (evt.type !== 'keyup') {
+        return false;
+      }
+
+      try {
+        let key = JSON.parse(Services.prefs.getCharPref('b2g.reload_key'));
+        return (evt.keyCode  == key.key   &&
+                evt.ctrlKey  == key.ctrl  &&
+                evt.altKey   == key.alt   &&
+                evt.shiftKey == key.shift &&
+                evt.metaKey  == key.meta);
+      } catch(e) {
+        debug('Failed to get key: ' + e);
+      }
+
+      return false;
+    }
+
+    let content = this.contentBrowser.contentWindow;
+    switch (evt.type) {
+      case 'keydown':
+      case 'keyup':
+        if (checkReloadKey()) {
+          clearCacheAndReload();
+        } else {
+          this.broadcastHardwareKeys(evt);
+        }
+        break;
+      case 'sizemodechange':
+        if (window.windowState == window.STATE_MINIMIZED && !this.visibleNormalAudioActive) {
+          this.contentBrowser.setVisible(false);
+        } else {
+          this.contentBrowser.setVisible(true);
+        }
+        break;
+      case 'load':
+        if (content.document.location == 'about:blank') {
+          return;
+        }
+        content.removeEventListener('load', this, true);
+        this.notifyContentWindowLoaded();
+        break;
+      case 'mozbrowserloadstart':
+        if (content.document.location == 'about:blank') {
+          this.contentBrowser.addEventListener('mozbrowserlocationchange', this, true);
+          return;
+        }
+
+        this.notifyContentStart();
+        break;
+      case 'mozbrowserlocationchange':
+        if (content.document.location == 'about:blank') {
+          return;
+        }
+
+        this.notifyContentStart();
+       break;
+      case 'mozbrowserscrollviewchange':
+        this.sendChromeEvent({
+          type: 'scrollviewchange',
+          detail: evt.detail,
+        });
+        break;
+      case 'mozbrowsercaretstatechanged':
+        {
+          let elt = evt.target;
+          let win = elt.ownerDocument.defaultView;
+          let offsetX = win.mozInnerScreenX - window.mozInnerScreenX;
+          let offsetY = win.mozInnerScreenY - window.mozInnerScreenY;
+
+          let rect = elt.getBoundingClientRect();
+          offsetX += rect.left;
+          offsetY += rect.top;
+
+          let data = evt.detail;
+          data.offsetX = offsetX;
+          data.offsetY = offsetY;
+          data.sendDoCommandMsg = null;
+
+          shell.sendChromeEvent({
+            type: 'caretstatechanged',
+            detail: data,
+          });
+        }
+        break;
+
+      case 'MozApplicationManifest':
+        try {
+          if (!Services.prefs.getBoolPref('browser.cache.offline.enable'))
+            return;
+
+          let contentWindow = evt.originalTarget.defaultView;
+          let documentElement = contentWindow.document.documentElement;
+          if (!documentElement)
+            return;
+
+          let manifest = documentElement.getAttribute('manifest');
+          if (!manifest)
+            return;
+
+          let principal = contentWindow.document.nodePrincipal;
+          if (Services.perms.testPermissionFromPrincipal(principal, 'offline-app') == Ci.nsIPermissionManager.UNKNOWN_ACTION) {
+            if (Services.prefs.getBoolPref('browser.offline-apps.notify')) {
+              // FIXME Bug 710729 - Add a UI for offline cache notifications
+              return;
+            }
+            return;
+          }
+
+          Services.perms.addFromPrincipal(principal, 'offline-app',
+                                          Ci.nsIPermissionManager.ALLOW_ACTION);
+
+          let documentURI = Services.io.newURI(contentWindow.document.documentURI,
+                                               null,
+                                               null);
+          let manifestURI = Services.io.newURI(manifest, null, documentURI);
+          let updateService = Cc['@mozilla.org/offlinecacheupdate-service;1']
+                              .getService(Ci.nsIOfflineCacheUpdateService);
+          updateService.scheduleUpdate(manifestURI, documentURI, principal, window);
+        } catch (e) {
+          dump('Error while creating offline cache: ' + e + '\n');
+        }
+        break;
+      case 'MozAfterPaint':
+        window.removeEventListener('MozAfterPaint', this);
+        // This event should be sent before System app returns with
+        // system-message-listener-ready mozContentEvent, because it's on
+        // the critical launch path of the app.
+        SystemAppProxy._sendCustomEvent('mozChromeEvent', {
+          type: 'system-first-paint'
+        }, /* noPending */ true);
+        break;
+      case 'unload':
+        this.stop();
+        break;
+    }
+  },
+
+  // Send an event to a specific window, document or element.
+  sendEvent: function shell_sendEvent(target, type, details) {
+    if (target === this.contentBrowser) {
+      // We must ask SystemAppProxy to send the event in this case so
+      // that event would be dispatched from frame.contentWindow instead of
+      // on the System app frame.
+      SystemAppProxy._sendCustomEvent(type, details);
+      return;
+    }
+
+    let doc = target.document || target.ownerDocument || target;
+    let event = doc.createEvent('CustomEvent');
+    event.initCustomEvent(type, true, true, details ? details : {});
+    target.dispatchEvent(event);
+  },
+
+  sendCustomEvent: function shell_sendCustomEvent(type, details) {
+    SystemAppProxy._sendCustomEvent(type, details);
+  },
+
+  sendChromeEvent: function shell_sendChromeEvent(details) {
+    this.sendCustomEvent("mozChromeEvent", details);
+  },
+
+  receiveMessage: function shell_receiveMessage(message) {
+    var activities = { 'content-handler': { name: 'view', response: null },
+                       'dial-handler':    { name: 'dial', response: null },
+                       'mail-handler':    { name: 'new',  response: null },
+                       'sms-handler':     { name: 'new',  response: null },
+                       'file-picker':     { name: 'pick', response: 'file-picked' } };
+
+    if (!(message.name in activities))
+      return;
+
+    let data = message.data;
+    let activity = activities[message.name];
+
+    let a = new MozActivity({
+      name: activity.name,
+      data: data
+    });
+
+    if (activity.response) {
+      a.onsuccess = function() {
+        let sender = message.target.QueryInterface(Ci.nsIMessageSender);
+        sender.sendAsyncMessage(activity.response, { success: true,
+                                                     result:  a.result });
+      }
+      a.onerror = function() {
+        let sender = message.target.QueryInterface(Ci.nsIMessageSender);
+        sender.sendAsyncMessage(activity.response, { success: false });
+      }
+    }
+  },
+
+  notifyContentStart: function shell_notifyContentStart() {
+    window.performance.mark('gecko-shell-notify-content-start');
+    this.contentBrowser.removeEventListener('mozbrowserloadstart', this, true);
+    this.contentBrowser.removeEventListener('mozbrowserlocationchange', this, true);
+
+    let content = this.contentBrowser.contentWindow;
+    content.addEventListener('load', this, true);
+
+    this.reportCrash(true);
+
+    SystemAppProxy.registerFrame(shell.contentBrowser);
+
+    this.sendEvent(window, 'ContentStart');
+
+    Services.obs.notifyObservers(null, 'content-start', null);
+
+    if (AppConstants.MOZ_GRAPHENE &&
+        Services.prefs.getBoolPref("b2g.nativeWindowGeometry.fullscreen")) {
+      window.fullScreen = true;
+    }
+
+    shell.handleCmdLine();
+  },
+
+  handleCmdLine: function() {
+    // This isn't supported on devices.
+    if (!isGonk) {
+      let b2gcmds = Cc["@mozilla.org/commandlinehandler/general-startup;1?type=b2gcmds"]
+                      .getService(Ci.nsISupports);
+      let args = b2gcmds.wrappedJSObject.cmdLine;
+      try {
+        // Returns null if -url is not present.
+        let url = args.handleFlagWithParam("url", false);
+        if (url) {
+          this.sendChromeEvent({type: "mozbrowseropenwindow", url});
+          args.preventDefault = true;
+        }
+      } catch(e) {
+        // Throws if -url is present with no params.
+      }
+    }
+  },
+
+  // This gets called when window.onload fires on the System app content window,
+  // which means things in <html> are parsed and statically referenced <script>s
+  // and <script defer>s are loaded and run.
+  notifyContentWindowLoaded: function shell_notifyContentWindowLoaded() {
+    isGonk && libcutils.property_set('sys.boot_completed', '1');
+
+    // This will cause Gonk Widget to remove boot animation from the screen
+    // and reveals the page.
+    Services.obs.notifyObservers(null, "browser-ui-startup-complete", "");
+
+    SystemAppProxy.setIsLoaded();
+  },
+
+  // This gets called when the content sends us system-message-listener-ready
+  // mozContentEvent, OR when an observer message tell us we should consider
+  // the content as ready.
+  notifyEventListenerReady: function shell_notifyEventListenerReady() {
+    if (this._isEventListenerReady) {
+      Cu.reportError('shell.js: SystemApp has already been declared as being ready.');
+      return;
+    }
+    this._isEventListenerReady = true;
+
+    if (Services.prefs.getBoolPref('b2g.orientation.animate')) {
+      Cu.import('resource://gre/modules/OrientationChangeHandler.jsm');
+    }
+
+    SystemAppProxy.setIsReady();
+  }
+};
+
+Services.obs.addObserver(function onFullscreenOriginChange(subject, topic, data) {
+  shell.sendChromeEvent({ type: "fullscreenoriginchange",
+                          fullscreenorigin: data });
+}, "fullscreen-origin-change", false);
+
+Services.obs.addObserver(function onBluetoothVolumeChange(subject, topic, data) {
+  shell.sendChromeEvent({
+    type: "bluetooth-volumeset",
+    value: data
+  });
+}, 'bluetooth-volume-change', false);
+
+Services.obs.addObserver(function(subject, topic, data) {
+  shell.sendCustomEvent('mozmemorypressure');
+}, 'memory-pressure', false);
+
+Services.obs.addObserver(function(subject, topic, data) {
+  shell.notifyEventListenerReady();
+}, 'system-message-listener-ready', false);
+
+var permissionMap = new Map([
+  ['unknown', Services.perms.UNKNOWN_ACTION],
+  ['allow', Services.perms.ALLOW_ACTION],
+  ['deny', Services.perms.DENY_ACTION],
+  ['prompt', Services.perms.PROMPT_ACTION],
+]);
+var permissionMapRev = new Map(Array.from(permissionMap.entries()).reverse());
+
+var CustomEventManager = {
+  init: function custevt_init() {
+    window.addEventListener("ContentStart", (function(evt) {
+      let content = shell.contentBrowser.contentWindow;
+      content.addEventListener("mozContentEvent", this, false, true);
+    }).bind(this), false);
+  },
+
+  handleEvent: function custevt_handleEvent(evt) {
+    let detail = evt.detail;
+    dump('XXX FIXME : Got a mozContentEvent: ' + detail.type + "\n");
+
+    switch(detail.type) {
+      case 'system-message-listener-ready':
+        Services.obs.notifyObservers(null, 'system-message-listener-ready', null);
+        break;
+      case 'captive-portal-login-cancel':
+        CaptivePortalLoginHelper.handleEvent(detail);
+        break;
+      case 'inputmethod-update-layouts':
+      case 'inputregistry-add':
+      case 'inputregistry-remove':
+        KeyboardHelper.handleEvent(detail);
+        break;
+      case 'copypaste-do-command':
+        Services.obs.notifyObservers({ wrappedJSObject: shell.contentBrowser },
+                                     'ask-children-to-execute-copypaste-command', detail.cmd);
+        break;
+      case 'add-permission':
+        Services.perms.add(Services.io.newURI(detail.uri, null, null),
+                           detail.permissionType, permissionMap.get(detail.permission));
+        break;
+      case 'remove-permission':
+        Services.perms.remove(Services.io.newURI(detail.uri, null, null),
+                              detail.permissionType);
+        break;
+      case 'test-permission':
+        let result = Services.perms.testExactPermission(
+          Services.io.newURI(detail.uri, null, null), detail.permissionType);
+        // Not equal check here because we want to prevent default only if it's not set
+        if (result !== permissionMapRev.get(detail.permission)) {
+          evt.preventDefault();
+        }
+        break;
+      case 'shutdown-application':
+        let appStartup = Cc['@mozilla.org/toolkit/app-startup;1']
+                           .getService(Ci.nsIAppStartup);
+        appStartup.quit(appStartup.eAttemptQuit);
+        break;
+      case 'toggle-fullscreen-native-window':
+        window.fullScreen = !window.fullScreen;
+        Services.prefs.setBoolPref("b2g.nativeWindowGeometry.fullscreen",
+                                   window.fullScreen);
+        break;
+      case 'minimize-native-window':
+        window.minimize();
+        break;
+      case 'clear-cache-and-reload':
+        clearCacheAndReload();
+        break;
+      case 'clear-cache-and-restart':
+        clearCache();
+        restart();
+        break;
+      case 'restart':
+        restart();
+        break;
+    }
+  }
+}
+
+var KeyboardHelper = {
+  handleEvent: function keyboard_handleEvent(detail) {
+    switch (detail.type) {
+      case 'inputmethod-update-layouts':
+        Keyboard.setLayouts(detail.layouts);
+
+        break;
+      case 'inputregistry-add':
+      case 'inputregistry-remove':
+        Keyboard.inputRegistryGlue.returnMessage(detail);
+
+        break;
+    }
+  }
+};
+
+// This is the backend for Gaia's screenshot feature.  Gaia requests a
+// screenshot by sending a mozContentEvent with detail.type set to
+// 'take-screenshot'.  Then we take a screenshot and send a
+// mozChromeEvent with detail.type set to 'take-screenshot-success'
+// and detail.file set to the an image/png blob
+window.addEventListener('ContentStart', function ss_onContentStart() {
+  let content = shell.contentBrowser.contentWindow;
+  content.addEventListener('mozContentEvent', function ss_onMozContentEvent(e) {
+    if (e.detail.type !== 'take-screenshot')
+      return;
+
+    try {
+      shell.sendChromeEvent({
+        type: 'take-screenshot-success',
+        file: Screenshot.get()
+      });
+    } catch (e) {
+      dump('exception while creating screenshot: ' + e + '\n');
+      shell.sendChromeEvent({
+        type: 'take-screenshot-error',
+        error: String(e)
+      });
+    }
+  });
+});
+
+(function contentCrashTracker() {
+  Services.obs.addObserver(function(aSubject, aTopic, aData) {
+      let props = aSubject.QueryInterface(Ci.nsIPropertyBag2);
+      if (props.hasKey("abnormal") && props.hasKey("dumpID")) {
+        shell.reportCrash(false, props.getProperty("dumpID"));
+      }
+    },
+    "ipc:content-shutdown", false);
+})();
+
+var CaptivePortalLoginHelper = {
+  init: function init() {
+    Services.obs.addObserver(this, 'captive-portal-login', false);
+    Services.obs.addObserver(this, 'captive-portal-login-abort', false);
+    Services.obs.addObserver(this, 'captive-portal-login-success', false);
+  },
+  handleEvent: function handleEvent(detail) {
+    Services.captivePortalDetector.cancelLogin(detail.id);
+  },
+  observe: function observe(subject, topic, data) {
+    shell.sendChromeEvent(JSON.parse(data));
+  }
+}
+
+// Listen for crashes submitted through the crash reporter UI.
+window.addEventListener('ContentStart', function cr_onContentStart() {
+  let content = shell.contentBrowser.contentWindow;
+  content.addEventListener("mozContentEvent", function cr_onMozContentEvent(e) {
+    if (e.detail.type == "submit-crash" && e.detail.crashID) {
+      debugCrashReport("submitting crash at user request ", e.detail.crashID);
+      shell.submitCrash(e.detail.crashID);
+    } else if (e.detail.type == "delete-crash" && e.detail.crashID) {
+      debugCrashReport("deleting crash at user request ", e.detail.crashID);
+      shell.deleteCrash(e.detail.crashID);
+    }
+  });
+});
+
+window.addEventListener('ContentStart', function update_onContentStart() {
+  if (!AppConstants.MOZ_UPDATER) {
+    return;
+  }
+
+  let promptCc = Cc["@mozilla.org/updates/update-prompt;1"];
+  if (!promptCc) {
+    return;
+  }
+
+  let updatePrompt = promptCc.createInstance(Ci.nsIUpdatePrompt);
+  if (!updatePrompt) {
+    return;
+  }
+
+  updatePrompt.wrappedJSObject.handleContentStart(shell);
+});
+/* The "GPSChipOn" is to indicate that GPS engine is turned ON by the modem.
+   During this GPS engine is turned ON by the modem, we make the location tracking icon visible to user.
+   Once GPS engine is turned OFF, the location icon will disappear.
+   If GPS engine is not turned ON by the modem or GPS location service is triggered,
+   we let GPS service take over the control of showing the location tracking icon.
+   The regular sequence of the geolocation-device-events is: starting-> GPSStarting-> shutdown-> GPSShutdown
+*/
+
+
+(function geolocationStatusTracker() {
+  let gGeolocationActive = false;
+  let GPSChipOn = false;
+
+  Services.obs.addObserver(function(aSubject, aTopic, aData) {
+    let oldState = gGeolocationActive;
+    let promptWarning = false;
+    switch (aData) {
+      case "GPSStarting":
+        if (!gGeolocationActive) {
+          gGeolocationActive = true;
+          GPSChipOn = true;
+          promptWarning = true;
+        }
+        break;
+      case "GPSShutdown":
+        if (GPSChipOn) {
+          gGeolocationActive = false;
+          GPSChipOn = false;
+        }
+        break;
+      case "starting":
+        gGeolocationActive = true;
+        GPSChipOn = false;
+        break;
+      case "shutdown":
+        gGeolocationActive = false;
+        break;
+    }
+
+    if (gGeolocationActive != oldState) {
+      shell.sendChromeEvent({
+        type: 'geolocation-status',
+        active: gGeolocationActive,
+        prompt: promptWarning
+      });
+    }
+}, "geolocation-device-events", false);
+})();
+
+(function headphonesStatusTracker() {
+  Services.obs.addObserver(function(aSubject, aTopic, aData) {
+    shell.sendChromeEvent({
+      type: 'headphones-status-changed',
+      state: aData
+    });
+}, "headphones-status-changed", false);
+})();
+
+(function audioChannelChangedTracker() {
+  Services.obs.addObserver(function(aSubject, aTopic, aData) {
+    shell.sendChromeEvent({
+      type: 'audio-channel-changed',
+      channel: aData
+    });
+}, "audio-channel-changed", false);
+})();
+
+(function defaultVolumeChannelChangedTracker() {
+  Services.obs.addObserver(function(aSubject, aTopic, aData) {
+    shell.sendChromeEvent({
+      type: 'default-volume-channel-changed',
+      channel: aData
+    });
+}, "default-volume-channel-changed", false);
+})();
+
+(function visibleAudioChannelChangedTracker() {
+  Services.obs.addObserver(function(aSubject, aTopic, aData) {
+    shell.sendChromeEvent({
+      type: 'visible-audio-channel-changed',
+      channel: aData
+    });
+    shell.visibleNormalAudioActive = (aData == 'normal');
+}, "visible-audio-channel-changed", false);
+})();
+
+(function recordingStatusTracker() {
+  // Recording status is tracked per process with following data structure:
+  // {<processId>: {<requestURL>: {isApp: <isApp>,
+  //                               count: <N>,
+  //                               audioCount: <N>,
+  //                               videoCount: <N>}}
+  let gRecordingActiveProcesses = {};
+
+  let recordingHandler = function(aSubject, aTopic, aData) {
+    let props = aSubject.QueryInterface(Ci.nsIPropertyBag2);
+    let processId = (props.hasKey('childID')) ? props.get('childID')
+                                              : 'main';
+    if (processId && !gRecordingActiveProcesses.hasOwnProperty(processId)) {
+      gRecordingActiveProcesses[processId] = {};
+    }
+
+    let commandHandler = function (requestURL, command) {
+      let currentProcess = gRecordingActiveProcesses[processId];
+      let currentActive = currentProcess[requestURL];
+      let wasActive = (currentActive['count'] > 0);
+      let wasAudioActive = (currentActive['audioCount'] > 0);
+      let wasVideoActive = (currentActive['videoCount'] > 0);
+
+      switch (command.type) {
+        case 'starting':
+          currentActive['count']++;
+          currentActive['audioCount'] += (command.isAudio) ? 1 : 0;
+          currentActive['videoCount'] += (command.isVideo) ? 1 : 0;
+          break;
+        case 'shutdown':
+          currentActive['count']--;
+          currentActive['audioCount'] -= (command.isAudio) ? 1 : 0;
+          currentActive['videoCount'] -= (command.isVideo) ? 1 : 0;
+          break;
+        case 'content-shutdown':
+          currentActive['count'] = 0;
+          currentActive['audioCount'] = 0;
+          currentActive['videoCount'] = 0;
+          break;
+      }
+
+      if (currentActive['count'] > 0) {
+        currentProcess[requestURL] = currentActive;
+      } else {
+        delete currentProcess[requestURL];
+      }
+
+      // We need to track changes if any active state is changed.
+      let isActive = (currentActive['count'] > 0);
+      let isAudioActive = (currentActive['audioCount'] > 0);
+      let isVideoActive = (currentActive['videoCount'] > 0);
+      if ((isActive != wasActive) ||
+          (isAudioActive != wasAudioActive) ||
+          (isVideoActive != wasVideoActive)) {
+        shell.sendChromeEvent({
+          type: 'recording-status',
+          active: isActive,
+          requestURL: requestURL,
+          isApp: currentActive['isApp'],
+          isAudio: isAudioActive,
+          isVideo: isVideoActive
+        });
+      }
+    };
+
+    switch (aData) {
+      case 'starting':
+      case 'shutdown':
+        // create page record if it is not existed yet.
+        let requestURL = props.get('requestURL');
+        if (requestURL &&
+            !gRecordingActiveProcesses[processId].hasOwnProperty(requestURL)) {
+          gRecordingActiveProcesses[processId][requestURL] = {isApp: props.get('isApp'),
+                                                              count: 0,
+                                                              audioCount: 0,
+                                                              videoCount: 0};
+        }
+        commandHandler(requestURL, { type: aData,
+                                     isAudio: props.get('isAudio'),
+                                     isVideo: props.get('isVideo')});
+        break;
+      case 'content-shutdown':
+        // iterate through all the existing active processes
+        Object.keys(gRecordingActiveProcesses[processId]).forEach(function(requestURL) {
+          commandHandler(requestURL, { type: aData,
+                                       isAudio: true,
+                                       isVideo: true});
+        });
+        break;
+    }
+
+    // clean up process record if no page record in it.
+    if (Object.keys(gRecordingActiveProcesses[processId]).length == 0) {
+      delete gRecordingActiveProcesses[processId];
+    }
+  };
+  Services.obs.addObserver(recordingHandler, 'recording-device-events', false);
+  Services.obs.addObserver(recordingHandler, 'recording-device-ipc-events', false);
+
+  Services.obs.addObserver(function(aSubject, aTopic, aData) {
+    // send additional recording events if content process is being killed
+    let processId = aSubject.QueryInterface(Ci.nsIPropertyBag2).get('childID');
+    if (gRecordingActiveProcesses.hasOwnProperty(processId)) {
+      Services.obs.notifyObservers(aSubject, 'recording-device-ipc-events', 'content-shutdown');
+    }
+  }, 'ipc:content-shutdown', false);
+})();
+
+(function volumeStateTracker() {
+  Services.obs.addObserver(function(aSubject, aTopic, aData) {
+    shell.sendChromeEvent({
+      type: 'volume-state-changed',
+      active: (aData == 'Shared')
+    });
+}, 'volume-state-changed', false);
+})();
+
+if (isGonk) {
+  // Devices don't have all the same partition size for /cache where we
+  // store the http cache.
+  (function setHTTPCacheSize() {
+    let path = Services.prefs.getCharPref("browser.cache.disk.parent_directory");
+    let volumeService = Cc["@mozilla.org/telephony/volume-service;1"]
+                          .getService(Ci.nsIVolumeService);
+
+    let stats = volumeService.createOrGetVolumeByPath(path).getStats();
+
+    // We must set the size in KB, and keep a bit of free space.
+    let size = Math.floor(stats.totalBytes / 1024) - 1024;
+
+    // keep the default value if it is smaller than the physical partition size.
+    let oldSize = Services.prefs.getIntPref("browser.cache.disk.capacity");
+    if (size < oldSize) {
+      Services.prefs.setIntPref("browser.cache.disk.capacity", size);
+    }
+  })();
+
+  try {
+    let gmpService = Cc["@mozilla.org/gecko-media-plugin-service;1"]
+                       .getService(Ci.mozIGeckoMediaPluginChromeService);
+    gmpService.addPluginDirectory("/system/b2g/gmp-clearkey/0.1");
+  } catch(e) {
+    dump("Failed to add clearkey path! " + e + "\n");
+  }
+}
+
+// Calling this observer will cause a shutdown an a profile reset.
+// Use eg. : Services.obs.notifyObservers(null, 'b2g-reset-profile', null);
+Services.obs.addObserver(function resetProfile(subject, topic, data) {
+  Services.obs.removeObserver(resetProfile, topic);
+
+  // Listening for 'profile-before-change-telemetry' which is late in the
+  // shutdown sequence, but still has xpcom access.
+  Services.obs.addObserver(function clearProfile(subject, topic, data) {
+    Services.obs.removeObserver(clearProfile, topic);
+    if (isGonk) {
+      let json = Cc['@mozilla.org/file/local;1'].createInstance(Ci.nsIFile);
+      json.initWithPath('/system/b2g/webapps/webapps.json');
+      let toRemove = json.exists()
+        // This is a user build, just rm -r /data/local /data/b2g/mozilla
+        ? ['/data/local', '/data/b2g/mozilla']
+        // This is an eng build. We clear the profile and a set of files
+        // under /data/local.
+        : ['/data/b2g/mozilla',
+           '/data/local/permissions.sqlite',
+           '/data/local/storage',
+           '/data/local/OfflineCache'];
+
+      toRemove.forEach(function(dir) {
+        try {
+          let file = Cc['@mozilla.org/file/local;1'].createInstance(Ci.nsIFile);
+          file.initWithPath(dir);
+          file.remove(true);
+        } catch(e) { dump(e); }
+      });
+    } else {
+      // Desktop builds.
+      let profile = Services.dirsvc.get('ProfD', Ci.nsIFile);
+
+      // We don't want to remove everything from the profile, since this
+      // would prevent us from starting up.
+      let whitelist = ['defaults', 'extensions', 'settings.json',
+                       'user.js', 'webapps'];
+      let enumerator = profile.directoryEntries;
+      while (enumerator.hasMoreElements()) {
+        let file = enumerator.getNext().QueryInterface(Ci.nsIFile);
+        if (whitelist.indexOf(file.leafName) == -1) {
+          file.remove(true);
+        }
+      }
+    }
+  },
+  'profile-before-change-telemetry', false);
+
+  let appStartup = Cc['@mozilla.org/toolkit/app-startup;1']
+                     .getService(Ci.nsIAppStartup);
+  appStartup.quit(Ci.nsIAppStartup.eForceQuit);
+}, 'b2g-reset-profile', false);
+
+var showInstallScreen;
+
+if (AppConstants.MOZ_GRAPHENE) {
+  const restoreWindowGeometry = () => {
+    let screenX = Services.prefs.getIntPref("b2g.nativeWindowGeometry.screenX");
+    let screenY = Services.prefs.getIntPref("b2g.nativeWindowGeometry.screenY");
+    let width = Services.prefs.getIntPref("b2g.nativeWindowGeometry.width");
+    let height = Services.prefs.getIntPref("b2g.nativeWindowGeometry.height");
+
+    if (screenX == -1) {
+      // Center
+      screenX = (screen.width - width) / 2;
+      screenY = (screen.height - height) / 2;
+    }
+
+    moveTo(screenX, screenY);
+    resizeTo(width, height);
+  }
+  restoreWindowGeometry();
+
+  const saveWindowGeometry = () => {
+    window.removeEventListener("unload", saveWindowGeometry);
+    Services.prefs.setIntPref("b2g.nativeWindowGeometry.screenX", screenX);
+    Services.prefs.setIntPref("b2g.nativeWindowGeometry.screenY", screenY);
+    Services.prefs.setIntPref("b2g.nativeWindowGeometry.width", outerWidth);
+    Services.prefs.setIntPref("b2g.nativeWindowGeometry.height", outerHeight);
+  }
+  window.addEventListener("unload", saveWindowGeometry);
+
+  var baseWindow = window.QueryInterface(Ci.nsIInterfaceRequestor)
+                         .getInterface(Ci.nsIWebNavigation)
+                         .QueryInterface(Ci.nsIDocShellTreeItem)
+                         .treeOwner
+                         .QueryInterface(Ci.nsIInterfaceRequestor)
+                         .getInterface(Ci.nsIBaseWindow);
+
+  const showNativeWindow = () => baseWindow.visibility = true;
+  const hideNativeWindow = () => baseWindow.visibility = false;
+
+  showInstallScreen = () => {
+    const grapheneStrings =
+      Services.strings.createBundle('chrome://b2g-l10n/locale/graphene.properties');
+    document.querySelector('#installing > .message').textContent =
+      grapheneStrings.GetStringFromName('installing');
+    showNativeWindow();
+  }
+
+  const hideInstallScreen = () => {
+    document.body.classList.add('content-loaded');
+  }
+
+  window.addEventListener('ContentStart', () => {
+    shell.contentBrowser.contentWindow.addEventListener('load', () => {
+      hideInstallScreen();
+      showNativeWindow();
+    });
+  });
+
+  hideNativeWindow();
+}
diff --git a/b2g/chrome/content/shell_remote.html b/b2g/chrome/content/shell_remote.html
new file mode 100644
index 000000000..4f3f6efc8
--- /dev/null
+++ b/b2g/chrome/content/shell_remote.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<!-- 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/.  -->
+
+<html xmlns="http://www.w3.org/1999/xhtml"
+      id="shellRemote"
+      windowtype="navigator:remote-browser"
+      sizemode="fullscreen"
+      >
+
+<head>
+  <link rel="stylesheet" href="shell.css" type="text/css">
+  <script type="application/javascript;version=1.8"
+          src="chrome://b2g/content/shell_remote.js"> </script>
+</head>
+  <body id="container">
+  </body>
+</html>
diff --git a/b2g/chrome/content/shell_remote.js b/b2g/chrome/content/shell_remote.js
new file mode 100644
index 000000000..1f1115ef0
--- /dev/null
+++ b/b2g/chrome/content/shell_remote.js
@@ -0,0 +1,139 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- /
+/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* 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";
+
+var {classes: Cc, interfaces: Ci, utils: Cu} = Components;
+
+Cu.import("resource://gre/modules/Services.jsm");
+Cu.import("resource://gre/modules/SystemAppProxy.jsm");
+
+function debug(aStr) {
+  // dump(" -*- ShellRemote.js: " + aStr + "\n");
+}
+
+var remoteShell = {
+
+  _started: false,
+
+  get homeURL() {
+    let systemAppManifestURL = Services.io.newURI(this.systemAppManifestURL, null, null);
+    let shellRemoteURL = Services.prefs.getCharPref("b2g.multiscreen.system_remote_url");
+    shellRemoteURL = Services.io.newURI(shellRemoteURL, null, systemAppManifestURL);
+    return shellRemoteURL.spec;
+  },
+
+  get systemAppManifestURL() {
+    return Services.prefs.getCharPref("b2g.system_manifest_url");
+  },
+
+  hasStarted: function () {
+    return this._started;
+  },
+
+  start: function () {
+    this._started = true;
+    this._isEventListenerReady = false;
+    this.id = window.location.hash.substring(1);
+
+    let homeURL = this.homeURL;
+    if (!homeURL) {
+      debug("ERROR! Remote home URL undefined.");
+      return;
+    }
+    let manifestURL = this.systemAppManifestURL;
+    // <html:iframe id="this.id"
+    //              mozbrowser="true"
+    //              allowfullscreen="true"
+    //              src="blank.html"/>
+    let systemAppFrame =
+      document.createElementNS("http://www.w3.org/1999/xhtml", "html:iframe");
+    systemAppFrame.setAttribute("id", this.id);
+    systemAppFrame.setAttribute("mozbrowser", "true");
+    systemAppFrame.setAttribute("mozapp", manifestURL);
+    systemAppFrame.setAttribute("allowfullscreen", "true");
+    systemAppFrame.setAttribute("src", "blank.html");
+
+    let container = document.getElementById("container");
+    this.contentBrowser = container.appendChild(systemAppFrame);
+    this.contentBrowser.src = homeURL + window.location.hash;
+
+    window.addEventListener("unload", this);
+    this.contentBrowser.addEventListener("mozbrowserloadstart", this);
+  },
+
+  stop: function () {
+    window.removeEventListener("unload", this);
+    this.contentBrowser.removeEventListener("mozbrowserloadstart", this);
+    this.contentBrowser.removeEventListener("mozbrowserlocationchange", this, true);
+    SystemAppProxy.unregisterFrameWithId(this.id);
+  },
+
+  notifyContentStart: function(evt) {
+    this.contentBrowser.removeEventListener("mozbrowserloadstart", this);
+    this.contentBrowser.removeEventListener("mozbrowserlocationchange", this, true);
+
+    SystemAppProxy.registerFrameWithId(remoteShell.id, remoteShell.contentBrowser);
+    SystemAppProxy.addEventListenerWithId(this.id, "mozContentEvent", this);
+
+    let content = this.contentBrowser.contentWindow;
+    content.addEventListener("load", this, true);
+  },
+
+  notifyContentWindowLoaded: function () {
+    SystemAppProxy.setIsLoadedWithId(this.id);
+  },
+
+  notifyEventListenerReady: function () {
+    if (this._isEventListenerReady) {
+      Cu.reportError("shell_remote.js: SystemApp has already been declared as being ready.");
+      return;
+    }
+    this._isEventListenerReady = true;
+    SystemAppProxy.setIsReadyWithId(this.id);
+  },
+
+  handleEvent: function(evt) {
+    debug("Got an event: " + evt.type);
+    let content = this.contentBrowser.contentWindow;
+
+    switch(evt.type) {
+      case "mozContentEvent":
+        if (evt.detail.type === "system-message-listener-ready") {
+          this.notifyEventListenerReady();
+        }
+        break;
+      case "load":
+        if (content.document.location == "about:blank") {
+          return;
+        }
+        content.removeEventListener("load", this, true);
+        this.notifyContentWindowLoaded();
+        break;
+      case "mozbrowserloadstart":
+        if (content.document.location == "about:blank") {
+          this.contentBrowser.addEventListener("mozbrowserlocationchange", this, true);
+          return;
+        }
+      case "mozbrowserlocationchange":
+        if (content.document.location == "about:blank") {
+          return;
+        }
+        this.notifyContentStart();
+        break;
+      case "unload":
+        this.stop();
+        break;
+    }
+  }
+};
+
+window.onload = function() {
+  if (remoteShell.hasStarted() == false) {
+    remoteShell.start();
+  }
+};
+
diff --git a/b2g/chrome/content/test/mochitest/RecordingStatusChromeScript.js b/b2g/chrome/content/test/mochitest/RecordingStatusChromeScript.js
new file mode 100644
index 000000000..1a5ed8274
--- /dev/null
+++ b/b2g/chrome/content/test/mochitest/RecordingStatusChromeScript.js
@@ -0,0 +1,40 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+var { classes: Cc, interfaces: Ci, results: Cr, utils: Cu } = Components;
+const { Services } = Cu.import('resource://gre/modules/Services.jsm');
+const { SystemAppProxy } = Cu.import('resource://gre/modules/SystemAppProxy.jsm');
+
+var processId;
+
+function peekChildId(aSubject, aTopic, aData) {
+  Services.obs.removeObserver(peekChildId, 'recording-device-events');
+  Services.obs.removeObserver(peekChildId, 'recording-device-ipc-events');
+  let props = aSubject.QueryInterface(Ci.nsIPropertyBag2);
+  if (props.hasKey('childID')) {
+    processId = props.get('childID');
+  }
+}
+
+addMessageListener('init-chrome-event', function(message) {
+  // listen mozChromeEvent and forward to content process.
+  let type = message.type;
+  SystemAppProxy.addEventListener('mozChromeEvent', function(event) {
+    let details = event.detail;
+    if (details.type === type) {
+      sendAsyncMessage('chrome-event', details);
+    }
+  }, true);
+
+  Services.obs.addObserver(peekChildId, 'recording-device-events', false);
+  Services.obs.addObserver(peekChildId, 'recording-device-ipc-events', false);
+});
+
+addMessageListener('fake-content-shutdown', function(message) {
+    let props = Cc["@mozilla.org/hash-property-bag;1"]
+                  .createInstance(Ci.nsIWritablePropertyBag2);
+    if (processId) {
+      props.setPropertyAsUint64('childID', processId);
+    }
+    Services.obs.notifyObservers(props, 'recording-device-ipc-events', 'content-shutdown');
+});
diff --git a/b2g/chrome/content/test/mochitest/RecordingStatusHelper.js b/b2g/chrome/content/test/mochitest/RecordingStatusHelper.js
new file mode 100644
index 000000000..5e3e6814e
--- /dev/null
+++ b/b2g/chrome/content/test/mochitest/RecordingStatusHelper.js
@@ -0,0 +1,82 @@
+'use strict';
+
+// resolve multiple promise in parallel
+function expectAll(aValue) {
+  let deferred = new Promise(function(resolve, reject) {
+    let countdown = aValue.length;
+    let resolutionValues = new Array(countdown);
+
+    for (let i = 0; i < aValue.length; i++) {
+      let index = i;
+      aValue[i].then(function(val) {
+        resolutionValues[index] = val;
+        if (--countdown === 0) {
+          resolve(resolutionValues);
+        }
+      }, reject);
+    }
+  });
+
+  return deferred;
+}
+
+function TestInit() {
+  let url = SimpleTest.getTestFileURL("RecordingStatusChromeScript.js")
+  let script = SpecialPowers.loadChromeScript(url);
+
+  let helper = {
+    finish: function () {
+      script.destroy();
+    },
+    fakeShutdown: function () {
+      script.sendAsyncMessage('fake-content-shutdown', {});
+    }
+  };
+
+  script.addMessageListener('chrome-event', function (message) {
+    if (helper.hasOwnProperty('onEvent')) {
+      helper.onEvent(message);
+    } else {
+      ok(false, 'unexpected message: ' + JSON.stringify(message));
+    }
+  });
+
+  script.sendAsyncMessage("init-chrome-event", {
+    type: 'recording-status'
+  });
+
+  return Promise.resolve(helper);
+}
+
+function expectEvent(expected, eventHelper) {
+  return new Promise(function(resolve, reject) {
+    eventHelper.onEvent = function(message) {
+      delete eventHelper.onEvent;
+      ok(message, JSON.stringify(message));
+      is(message.type, 'recording-status', 'event type: ' + message.type);
+      is(message.active, expected.active, 'recording active: ' + message.active);
+      is(message.isAudio, expected.isAudio, 'audio recording active: ' + message.isAudio);
+      is(message.isVideo, expected.isVideo, 'video recording active: ' + message.isVideo);
+      resolve(eventHelper);
+    };
+    info('waiting for recording-status');
+  });
+}
+
+function expectStream(params, callback) {
+  return new Promise(function(resolve, reject) {
+    var req = navigator.mozGetUserMedia(
+      params,
+      function(stream) {
+        ok(true, 'create media stream');
+        callback(stream);
+        resolve();
+      },
+      function(err) {
+        ok(false, 'fail to create media stream');
+        reject(err);
+      }
+    );
+    info('waiting for gUM result');
+  });
+}
diff --git a/b2g/chrome/content/test/mochitest/file_getusermedia_iframe.html b/b2g/chrome/content/test/mochitest/file_getusermedia_iframe.html
new file mode 100644
index 000000000..f2b18eab3
--- /dev/null
+++ b/b2g/chrome/content/test/mochitest/file_getusermedia_iframe.html
@@ -0,0 +1,36 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Iframe for Recording Status</title>
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript;version=1.7" src="RecordingStatusHelper.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+
+<pre id="test">
+<script class="testbody" type="text/javascript;version=1.7">
+
+var localStream;
+
+window.addEventListener('message', function(event) {
+  switch (event.data) {
+    case 'start':
+      let gumDeferred = expectStream({ audio: true,
+                                       fake: true
+                                     }, function(stream) {
+                                       localStream = stream;
+                                       event.source.postMessage('start-finished', window.location.origin);
+                                     });
+      break;
+    case 'stop':
+      localStream.stop();
+      localStream = null;
+      break;
+  }
+}, false);
+
+</script>
+</pre>
+</body>
+</html>
diff --git a/b2g/chrome/content/test/mochitest/mochitest.ini b/b2g/chrome/content/test/mochitest/mochitest.ini
new file mode 100644
index 000000000..d18a20401
--- /dev/null
+++ b/b2g/chrome/content/test/mochitest/mochitest.ini
@@ -0,0 +1,11 @@
+[DEFAULT]
+skip-if = ((buildapp == 'mulet' || buildapp == 'b2g') && toolkit != 'gonk') #require OOP support for mochitest-b2g-desktop, Bug 957554
+support-files =
+  RecordingStatusChromeScript.js
+  RecordingStatusHelper.js
+  file_getusermedia_iframe.html
+
+[test_recordingStatus_basic.html]
+[test_recordingStatus_multiple_requests.html]
+[test_recordingStatus_iframe.html]
+[test_recordingStatus_kill_content_process.html]
diff --git a/b2g/chrome/content/test/mochitest/moz.build b/b2g/chrome/content/test/mochitest/moz.build
new file mode 100644
index 000000000..3b13ba431
--- /dev/null
+++ b/b2g/chrome/content/test/mochitest/moz.build
@@ -0,0 +1,7 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# 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/.
+
+MOCHITEST_MANIFESTS += ['mochitest.ini']
diff --git a/b2g/chrome/content/test/mochitest/test_recordingStatus_basic.html b/b2g/chrome/content/test/mochitest/test_recordingStatus_basic.html
new file mode 100644
index 000000000..21f746d33
--- /dev/null
+++ b/b2g/chrome/content/test/mochitest/test_recordingStatus_basic.html
@@ -0,0 +1,119 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Test for Recording Status</title>
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript;version=1.7" src="RecordingStatusHelper.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+
+<pre id="test">
+<script class="testbody" type="text/javascript;version=1.7">
+'use strict';
+
+SimpleTest.waitForExplicitFinish();
+
+function test() {
+  let localStreams = [];
+  TestInit().then(function(eventHelper) {
+    /* step 1: create one audio stream
+     * expect: see one mozChromeEvent for audio recording start.
+     */
+    let eventDeferred = expectEvent({ active: true,
+                                      isAudio: true,
+                                      isVideo: false
+                                    }, eventHelper);
+
+    let gumDeferred = expectStream({ audio: true,
+                                     fake: true
+                                   }, function(stream) {
+                                     localStreams.push(stream);
+                                   });
+
+    return expectAll([eventDeferred, gumDeferred]);
+  }).then(function([eventHelper]) {
+    /* step 2: close the audio stream
+     * expect: see one mozChromeEvent for recording stop.
+     */
+    let eventDeferred = expectEvent({ active: false,
+                                      isAudio: false,
+                                      isVideo: false,
+                                    }, eventHelper);
+
+    localStreams.shift().stop();
+    info('stop audio stream');
+    return eventDeferred;
+  }).then(function(eventHelper) {
+    /* step 3: create one video stream
+     * expect: see one mozChromeEvent for video recording start
+     */
+    let eventDeferred = expectEvent({ active: true,
+                                      isAudio: false,
+                                      isVideo: true
+                                    }, eventHelper);
+
+    let gumDeferred = expectStream({ video: true,
+                                     fake: true
+                                   }, function(stream) {
+                                     localStreams.push(stream);
+                                   });
+
+    return expectAll([eventDeferred, gumDeferred]);
+  }).then(function([eventHelper]) {
+    /* step 4: close the audio stream
+     * expect: see one mozChromeEvent for recording stop.
+     */
+    let eventDeferred = expectEvent({ active: false,
+                                      isAudio: false,
+                                      isVideo: false,
+                                    }, eventHelper);
+
+    localStreams.shift().stop();
+    info('stop video stream');
+    return eventDeferred;
+  }).then(function(eventHelper) {
+    /* step 3: create one audio/video stream
+     * expect: see one mozChromeEvent for audio/video recording start
+     */
+    let eventDeferred = expectEvent({ active: true,
+                                      isAudio: true,
+                                      isVideo: true
+                                    }, eventHelper);
+
+    let gumDeferred = expectStream({ audio: true,
+                                     video: true,
+                                     fake: true
+                                   }, function(stream) {
+                                     localStreams.push(stream);
+                                   });
+
+    return expectAll([eventDeferred, gumDeferred]);
+  }).then(function([eventHelper]) {
+    /* step 4: close the audio stream
+     * expect: see one mozChromeEvent for recording stop.
+     */
+    let eventDeferred = expectEvent({ active: false,
+                                      isAudio: false,
+                                      isVideo: false,
+                                    }, eventHelper);
+
+    localStreams.shift().stop();
+    info('stop audio/video stream');
+    return eventDeferred;
+  }).then(function(eventHelper) {
+    eventHelper.finish();
+    SimpleTest.finish();
+  });
+}
+
+SpecialPowers.pushPrefEnv({
+  "set": [
+    ['media.navigator.permission.disabled', true]
+  ]
+}, test);
+
+</script>
+</pre>
+</body>
+</html>
diff --git a/b2g/chrome/content/test/mochitest/test_recordingStatus_iframe.html b/b2g/chrome/content/test/mochitest/test_recordingStatus_iframe.html
new file mode 100644
index 000000000..88c33c897
--- /dev/null
+++ b/b2g/chrome/content/test/mochitest/test_recordingStatus_iframe.html
@@ -0,0 +1,71 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Test for Recording Status in iframe</title>
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript;version=1.7" src="RecordingStatusHelper.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+
+<pre id="test">
+<iframe id="gum-iframe"></iframe>
+<script class="testbody" type="text/javascript;version=1.7">
+SimpleTest.waitForExplicitFinish();
+
+function test() {
+  TestInit().then(function(eventHelper) {
+    /* step 1: load iframe whilch creates audio stream
+     * expect: see one mozChromeEvent for audio recording start.
+     */
+    let eventDeferred = expectEvent({ active: true,
+                                      isAudio: true,
+                                      isVideo: false
+                                    }, eventHelper);
+
+    let loadDeferred = new Promise(function(resolve, reject) {
+      let gumIframe = document.getElementById('gum-iframe');
+      gumIframe.src = 'file_getusermedia_iframe.html';
+
+      window.addEventListener('message', function(event) {
+        if (event.data === 'start-finished') {
+          resolve();
+        }
+      }, false);
+
+      gumIframe.onload = function() {
+        info('start audio stream in iframe');
+        gumIframe.contentWindow.postMessage('start', window.location.origin);
+      };
+    });
+
+    return expectAll([eventDeferred, loadDeferred]);
+  }).then(function([eventHelper]) {
+    /* step 2: close the audio stream
+     * expect: see one mozChromeEvent for recording stop.
+     */
+    let eventDeferred = expectEvent({ active: false,
+                                      isAudio: false,
+                                      isVideo: false
+                                    }, eventHelper);
+
+    let win = document.getElementById('gum-iframe').contentWindow;
+    win.postMessage('stop', window.location.origin);
+    info('stop audio stream in iframe');
+    return eventDeferred;
+  }).then(function(eventHelper) {
+    eventHelper.finish();
+    SimpleTest.finish();
+  });
+}
+
+SpecialPowers.pushPrefEnv({
+  "set": [
+    ['media.navigator.permission.disabled', true]
+  ]
+}, test);
+
+</script>
+</pre>
+</body>
+</html>
diff --git a/b2g/chrome/content/test/mochitest/test_recordingStatus_kill_content_process.html b/b2g/chrome/content/test/mochitest/test_recordingStatus_kill_content_process.html
new file mode 100644
index 000000000..239c2c2d5
--- /dev/null
+++ b/b2g/chrome/content/test/mochitest/test_recordingStatus_kill_content_process.html
@@ -0,0 +1,72 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Test for Recording Status after process shutdown</title>
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript;version=1.7" src="RecordingStatusHelper.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+
+<pre id="test">
+<script class="testbody" type="text/javascript;version=1.7">
+SimpleTest.waitForExplicitFinish();
+
+function test() {
+  let localStreams = [];
+  TestInit().then(function(eventHelper) {
+    /* step 1: load iframe whilch creates audio stream
+     * expect: see one mozChromeEvent for audio recording start.
+     */
+    let eventDeferred = expectEvent({ active: true,
+                                      isAudio: true,
+                                      isVideo: false
+                                    }, eventHelper);
+
+    let gumDeferred = expectStream({ audio: true,
+                                     fake: true
+                                   }, function(stream) { localStreams.push(stream); });
+
+    return expectAll([eventDeferred, gumDeferred]);
+  }).then(function([eventHelper]) {
+    /* step 2: create video stream
+     * expect: see one mozChromeEvent for audio recording start.
+     */
+    let eventDeferred = expectEvent({ active: true,
+                                      isAudio: true,
+                                      isVideo: true
+                                    }, eventHelper);
+
+    let gumDeferred = expectStream({ video: true,
+                                     fake: true
+                                   }, function(stream) { localStreams.push(stream); });
+
+    return expectAll([eventDeferred, gumDeferred]);
+  }).then(function([eventHelper]) {
+    /* step 3: close the audio stream
+     * expect: see one mozChromeEvent for recording stop.
+     */
+    let eventDeferred = expectEvent({ active: false,
+                                      isAudio: false,
+                                      isVideo: false
+                                    }, eventHelper);
+
+    eventHelper.fakeShutdown();
+    info('simulate content process been killed');
+    return eventDeferred;
+  }).then(function(eventHelper) {
+    eventHelper.finish();
+    SimpleTest.finish();
+  });
+}
+
+SpecialPowers.pushPrefEnv({
+  "set": [
+    ['media.navigator.permission.disabled', true]
+  ]
+}, test);
+
+</script>
+</pre>
+</body>
+</html>
diff --git a/b2g/chrome/content/test/mochitest/test_recordingStatus_multiple_requests.html b/b2g/chrome/content/test/mochitest/test_recordingStatus_multiple_requests.html
new file mode 100644
index 000000000..7d31a94f8
--- /dev/null
+++ b/b2g/chrome/content/test/mochitest/test_recordingStatus_multiple_requests.html
@@ -0,0 +1,108 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Test for Recording Status with multiple gUM requests</title>
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript;version=1.7" src="RecordingStatusHelper.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+
+<pre id="test">
+<script class="testbody" type="text/javascript;version=1.7">
+'use strict';
+
+SimpleTest.waitForExplicitFinish();
+
+function test() {
+  let localStreams = [];
+  TestInit().then(function(eventHelper) {
+    /* step 1: create one audio stream
+     * expect: see one mozChromeEvent for recording start.
+     */
+    let eventDeferred = expectEvent({ active: true,
+                                      isAudio: true,
+                                      isVideo: false
+                                    }, eventHelper);
+
+    let gumDeferred = expectStream({ audio: true,
+                                     fake: true
+                                   }, function(stream) {
+                                     localStreams.push(stream);
+                                   });
+
+    return expectAll([eventDeferred, gumDeferred]);
+  }).then(function([eventHelper]) {
+    /* step 2: create another audio stream
+     * expect: no mozChromeEvent after audio stream is created
+     */
+    let gumDeferred = expectStream({ audio: true,
+                                     fake: true
+                                   }, function(stream) {
+                                     localStreams.push(stream);
+                                   });
+
+    return expectAll([Promise.resolve(eventHelper), gumDeferred]);
+  }).then(function([eventHelper]) {
+    /* step 3: create video stream
+     * expect: see one mozChromeEvent for recording start
+     */
+    let eventDeferred = expectEvent({ active: true,
+                                      isAudio: true,
+                                      isVideo: true
+                                    }, eventHelper);
+
+    let gumDeferred = expectStream({ video: true,
+                                     fake: true
+                                    }, function(stream) {
+                                      localStreams.push(stream);
+                                    });
+
+    return expectAll([eventDeferred, gumDeferred]);
+  }).then(function([eventHelper]) {
+    /* step 4: stop first audio stream
+     * expect: no mozChromeEvent after first audio stream is stopped
+     */
+    localStreams.shift().stop();
+    info('stop the first audio stream');
+    return Promise.resolve(eventHelper);
+  }).then(function(eventHelper) {
+    /* step 5: stop the second audio stream
+     * expect: see one mozChromeEvent for audio recording stop.
+     */
+    let eventDeferred = expectEvent({ active: true,
+                                      isAudio: false,
+                                      isVideo: true
+                                    }, eventHelper);
+
+    localStreams.shift().stop();
+    info('stop the second audio stream');
+    return eventDeferred;
+  }).then(function(eventHelper) {
+    /* step 6: stop the video stream
+     * expect: see one mozChromeEvent for video recording stop.
+     */
+    let eventDeferred = expectEvent({ active: false,
+                                      isAudio: false,
+                                      isVideo: false
+                                    }, eventHelper);
+
+    localStreams.shift().stop();
+    info('stop the video stream');
+    return eventDeferred;
+  }).then(function(eventHelper) {
+    eventHelper.finish();
+    SimpleTest.finish();
+  });
+}
+
+SpecialPowers.pushPrefEnv({
+  "set": [
+    ['media.navigator.permission.disabled', true]
+  ]
+}, test);
+
+</script>
+</pre>
+</body>
+</html>
diff --git a/b2g/chrome/content/touchcontrols.css b/b2g/chrome/content/touchcontrols.css
new file mode 100644
index 000000000..7c407c331
--- /dev/null
+++ b/b2g/chrome/content/touchcontrols.css
@@ -0,0 +1,233 @@
+/* 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/. */
+
+@namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul);
+
+/* video controls */
+.controlsOverlay {
+  -moz-box-pack: center;
+  -moz-box-align: end;
+  -moz-box-flex: 1;
+  -moz-box-orient: horizontal;
+}
+
+.controlsOverlay[scaled] {
+  /* scaled attribute in videocontrols.css causes conflict
+     due to different -moz-box-orient values */
+  -moz-box-align: end;
+}
+
+.controlBar {
+  -moz-box-flex: 1;
+  background-color: rgba(50,50,50,0.8);
+  width: 100%;
+}
+
+.buttonsBar {
+  -moz-box-flex: 1;
+  -moz-box-align: center;
+}
+
+.controlsSpacer {
+  display: none;
+  -moz-box-flex: 0;
+}
+
+.fullscreenButton,
+.playButton,
+.castingButton,
+.muteButton {
+  -moz-appearance: none;
+  padding: 2px;
+  border: none !important;
+  min-height: 24px;
+  min-width: 24px;
+}
+
+.fullscreenButton {
+  background: url("chrome://b2g/content/images/fullscreen-hdpi.png") no-repeat center;
+  background-size: contain;
+  background-origin: content-box;
+}
+
+.fullscreenButton[fullscreened="true"] {
+  background: url("chrome://b2g/content/images/exitfullscreen-hdpi.png") no-repeat center;
+  background-size: contain;
+  background-origin: content-box;
+}
+
+.controlBar[fullscreen-unavailable] .fullscreenButton {
+  display: none;
+}
+
+.playButton {
+  background: url("chrome://b2g/content/images/pause-hdpi.png") no-repeat center;
+  background-size: contain;
+  background-origin: content-box;
+}
+
+/*
+ * Normally the button bar has fullscreen spacer play spacer mute, but if
+ * this is an audio control rather than a video control, the fullscreen button
+ * is hidden by videocontrols.xml, and that alters the position of the
+ * play button.  This workaround moves it back to center.
+ */
+.controlBar[fullscreen-unavailable] .playButton {
+  transform: translateX(28px);
+}
+
+.playButton[paused="true"] {
+  background: url("chrome://b2g/content/images/play-hdpi.png") no-repeat center;
+  background-size: contain;
+  background-origin: content-box;
+}
+
+.castingButton {
+  display: none;
+}
+
+.muteButton {
+  background: url("chrome://b2g/content/images/mute-hdpi.png") no-repeat center;
+  background-size: contain;
+  background-origin: content-box;
+}
+
+.muteButton[muted="true"] {
+  background: url("chrome://b2g/content/images/unmute-hdpi.png") no-repeat center;
+  background-size: contain;
+  background-origin: content-box;
+}
+
+/* bars */
+.scrubberStack {
+  -moz-box-flex: 1;
+  padding: 0px 18px;
+}
+
+.flexibleBar,
+.flexibleBar .progress-bar,
+.bufferBar,
+.bufferBar .progress-bar,
+.progressBar,
+.progressBar .progress-bar,
+.scrubber,
+.scrubber .scale-slider,
+.scrubber .scale-thumb {
+  -moz-appearance: none;
+  border: none;
+  padding: 0px;
+  margin: 0px;
+  background-color: transparent;
+}
+
+.flexibleBar,
+.bufferBar,
+.progressBar {
+  height: 24px;
+  padding: 11px 0px;
+}
+
+.flexibleBar {
+  padding: 12px 0px;
+}
+
+.flexibleBar .progress-bar {
+  border: 1px #777777 solid;
+  border-radius: 1px;
+}
+
+.bufferBar .progress-bar {
+  border: 2px #AFB1B3 solid;
+  border-radius: 2px;
+}
+
+.progressBar .progress-bar {
+  border: 2px #FF9500 solid;
+  border-radius: 2px;
+}
+
+
+.scrubber {
+  margin-left: -8px;
+  margin-right: -8px;
+}
+
+.positionLabel, .durationLabel {
+  font-family: 'Roboto', Helvetica, Arial, sans-serif;
+  font-size: 12px;
+  color: white;
+}
+
+.scrubber .scale-thumb {
+  display: -moz-box;
+  margin: 0px !important;
+  padding: 0px !important;
+  background: url("chrome://b2g/content/images/scrubber-hdpi.png") no-repeat;
+  background-size: 12px 12px;
+  height: 12px;
+  width: 12px;
+}
+
+.statusOverlay {
+  -moz-box-align: center;
+  -moz-box-pack: center;
+  background-color: rgb(50,50,50);
+}
+
+.statusIcon {
+  margin-bottom: 28px;
+  width: 36px;
+  height: 36px;
+}
+
+.statusIcon[type="throbber"] {
+  background: url("chrome://b2g/content/images/throbber.png") no-repeat center;
+}
+
+.statusIcon[type="error"] {
+  background: url("chrome://b2g/content/images/error.png") no-repeat center;
+}
+
+/* CSS Transitions */
+.controlBar:not([immediate]) {
+  transition-property: opacity;
+  transition-duration: 200ms;
+}
+
+.controlBar[fadeout] {
+  opacity: 0;
+}
+
+.statusOverlay:not([immediate]) {
+  transition-property: opacity;
+  transition-duration: 300ms;
+  transition-delay: 750ms;
+}
+
+.statusOverlay[fadeout] {
+  opacity: 0;
+}
+
+.volumeStack,
+.controlBar[firstshow="true"] .fullscreenButton,
+.controlBar[firstshow="true"] .muteButton,
+.controlBar[firstshow="true"] .scrubberStack,
+.controlBar[firstshow="true"] .durationBox,
+.timeLabel {
+  display: none;
+}
+
+/* Error description formatting */
+.errorLabel {
+  font-family: Helvetica, Arial, sans-serif;
+  font-size: 11px;
+  color: #bbb;
+  text-shadow:
+    -1px -1px 0 #000,
+    1px -1px 0 #000,
+    -1px 1px 0 #000,
+    1px 1px 0 #000;
+  padding: 0 10px;
+  text-align: center;
+}
diff --git a/b2g/chrome/jar.mn b/b2g/chrome/jar.mn
new file mode 100644
index 000000000..1fdea9a50
--- /dev/null
+++ b/b2g/chrome/jar.mn
@@ -0,0 +1,60 @@
+#filter substitution
+# 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/.
+
+
+chrome.jar:
+% content branding %content/branding/ contentaccessible=yes
+% content b2g %content/
+
+  content/arrow.svg                     (content/arrow.svg)
+  content/settings.js                   (content/settings.js)
+* content/shell.html                    (content/shell.html)
+  content/shell.js                      (content/shell.js)
+  content/shell_remote.html             (content/shell_remote.html)
+  content/shell_remote.js               (content/shell_remote.js)
+* content/shell.css                     (content/shell.css)
+  content/blank.html                    (content/blank.html)
+  content/blank.css                     (content/blank.css)
+#ifdef MOZ_WIDGET_GONK
+  content/devtools/adb.js               (content/devtools/adb.js)
+#endif
+  content/devtools/debugger.js          (content/devtools/debugger.js)
+  content/devtools/hud.js               (content/devtools/hud.js)
+#ifndef MOZ_WIDGET_GONK
+  content/desktop.css                   (content/desktop.css)
+  content/images/desktop/home-black.png (content/images/desktop/home-black.png)
+  content/images/desktop/home-white.png (content/images/desktop/home-white.png)
+  content/images/desktop/rotate.png     (content/images/desktop/rotate.png)
+  content/desktop.js                    (content/desktop.js)
+  content/screen.js                     (content/screen.js)
+#endif
+* content/content.css                   (content/content.css)
+  content/touchcontrols.css             (content/touchcontrols.css)
+
+  content/identity.js                   (content/identity.js)
+
+#ifndef MOZ_GRAPHENE
+% override chrome://global/skin/media/videocontrols.css chrome://b2g/content/touchcontrols.css
+#endif
+% override chrome://global/content/aboutCertError.xhtml chrome://b2g/content/aboutCertError.xhtml
+% override chrome://global/skin/netError.css chrome://b2g/content/netError.css
+
+  content/ErrorPage.js                  (content/ErrorPage.js)
+  content/aboutCertError.xhtml          (content/aboutCertError.xhtml)
+  content/netError.css                  (content/netError.css)
+  content/images/errorpage-larry-black.png (content/images/errorpage-larry-black.png)
+  content/images/errorpage-larry-white.png (content/images/errorpage-larry-white.png)
+  content/images/errorpage-warning.png (content/images/errorpage-warning.png)
+  content/images/arrowdown-16.png      (content/images/arrowdown-16.png)
+  content/images/arrowright-16.png     (content/images/arrowright-16.png)
+  content/images/scrubber-hdpi.png     (content/images/scrubber-hdpi.png)
+  content/images/unmute-hdpi.png       (content/images/unmute-hdpi.png)
+  content/images/pause-hdpi.png        (content/images/pause-hdpi.png)
+  content/images/play-hdpi.png         (content/images/play-hdpi.png)
+  content/images/mute-hdpi.png         (content/images/mute-hdpi.png)
+  content/images/fullscreen-hdpi.png     (content/images/fullscreen-hdpi.png)
+  content/images/exitfullscreen-hdpi.png (content/images/exitfullscreen-hdpi.png)
+  content/images/throbber.png          (content/images/throbber.png)
+  content/images/error.png             (content/images/error.png)
diff --git a/b2g/chrome/moz.build b/b2g/chrome/moz.build
new file mode 100644
index 000000000..99af44a5c
--- /dev/null
+++ b/b2g/chrome/moz.build
@@ -0,0 +1,13 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# 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/.
+
+DEFINES['AB_CD'] = CONFIG['MOZ_UI_LOCALE']
+DEFINES['PACKAGE'] = 'b2g'
+DEFINES['MOZ_APP_VERSION'] = CONFIG['MOZ_APP_VERSION']
+
+JAR_MANIFESTS += ['jar.mn']
+
+TEST_DIRS += ['content/test/mochitest']
author	Matt A. Tobin <mattatobin@localhost.localdomain>	2018-02-02 04:16:08 -0500
committer	Matt A. Tobin <mattatobin@localhost.localdomain>	2018-02-02 04:16:08 -0500
commit	5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree	10027f336435511475e392454359edea8e25895d /b2g/chrome
parent	49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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