Add m-esr52 at 52.6.0

48 files changed, 4590 insertions, 0 deletions

diff --git a/devtools/client/jsonview/.eslintrc.js b/devtools/client/jsonview/.eslintrc.js
new file mode 100644
index 000000000..bd1e31981
--- /dev/null
+++ b/devtools/client/jsonview/.eslintrc.js
@@ -0,0 +1,11 @@
+"use strict";
+
+module.exports = {
+  "globals": {
+    "define": true,
+    "document": true,
+    "window": true,
+    "CustomEvent": true,
+    "Locale": true
+  }
+};
diff --git a/devtools/client/jsonview/components/headers-panel.js b/devtools/client/jsonview/components/headers-panel.js
new file mode 100644
index 000000000..9229aaa01
--- /dev/null
+++ b/devtools/client/jsonview/components/headers-panel.js
@@ -0,0 +1,79 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
+/* 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";
+
+define(function (require, exports, module) {
+  const { DOM: dom, createFactory, createClass, PropTypes } = require("devtools/client/shared/vendor/react");
+  const { createFactories } = require("devtools/client/shared/components/reps/rep-utils");
+  const { Headers } = createFactories(require("./headers"));
+  const { Toolbar, ToolbarButton } = createFactories(require("./reps/toolbar"));
+
+  const { div } = dom;
+
+  /**
+   * This template represents the 'Headers' panel
+   * s responsible for rendering its content.
+   */
+  let HeadersPanel = createClass({
+    displayName: "HeadersPanel",
+
+    propTypes: {
+      actions: PropTypes.object,
+      data: PropTypes.object,
+    },
+
+    getInitialState: function () {
+      return {
+        data: {}
+      };
+    },
+
+    render: function () {
+      let data = this.props.data;
+
+      return (
+        div({className: "headersPanelBox"},
+          HeadersToolbar({actions: this.props.actions}),
+          div({className: "panelContent"},
+            Headers({data: data})
+          )
+        )
+      );
+    }
+  });
+
+  /**
+   * This template is responsible for rendering a toolbar
+   * within the 'Headers' panel.
+   */
+  let HeadersToolbar = createFactory(createClass({
+    displayName: "HeadersToolbar",
+
+    propTypes: {
+      actions: PropTypes.object,
+    },
+
+    // Commands
+
+    onCopy: function (event) {
+      this.props.actions.onCopyHeaders();
+    },
+
+    render: function () {
+      return (
+        Toolbar({},
+          ToolbarButton({className: "btn copy", onClick: this.onCopy},
+            Locale.$STR("jsonViewer.Copy")
+          )
+        )
+      );
+    },
+  }));
+
+  // Exports from this module
+  exports.HeadersPanel = HeadersPanel;
+});
diff --git a/devtools/client/jsonview/components/headers.js b/devtools/client/jsonview/components/headers.js
new file mode 100644
index 000000000..38ac4051c
--- /dev/null
+++ b/devtools/client/jsonview/components/headers.js
@@ -0,0 +1,105 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+define(function (require, exports, module) {
+  const { DOM: dom, createFactory, createClass, PropTypes } = require("devtools/client/shared/vendor/react");
+
+  const { div, span, table, tbody, tr, td, } = dom;
+
+  /**
+   * This template is responsible for rendering basic layout
+   * of the 'Headers' panel. It displays HTTP headers groups such as
+   * received or response headers.
+   */
+  let Headers = createClass({
+    displayName: "Headers",
+
+    propTypes: {
+      data: PropTypes.object,
+    },
+
+    getInitialState: function () {
+      return {};
+    },
+
+    render: function () {
+      let data = this.props.data;
+
+      return (
+        div({className: "netInfoHeadersTable"},
+          div({className: "netHeadersGroup"},
+            div({className: "netInfoHeadersGroup"},
+              Locale.$STR("jsonViewer.responseHeaders")
+            ),
+            table({cellPadding: 0, cellSpacing: 0},
+              HeaderList({headers: data.response})
+            )
+          ),
+          div({className: "netHeadersGroup"},
+            div({className: "netInfoHeadersGroup"},
+              Locale.$STR("jsonViewer.requestHeaders")
+            ),
+            table({cellPadding: 0, cellSpacing: 0},
+              HeaderList({headers: data.request})
+            )
+          )
+        )
+      );
+    }
+  });
+
+  /**
+   * This template renders headers list,
+   * name + value pairs.
+   */
+  let HeaderList = createFactory(createClass({
+    displayName: "HeaderList",
+
+    propTypes: {
+      headers: PropTypes.arrayOf(PropTypes.shape({
+        name: PropTypes.string,
+        value: PropTypes.string
+      }))
+    },
+
+    getInitialState: function () {
+      return {
+        headers: []
+      };
+    },
+
+    render: function () {
+      let headers = this.props.headers;
+
+      headers.sort(function (a, b) {
+        return a.name > b.name ? 1 : -1;
+      });
+
+      let rows = [];
+      headers.forEach(header => {
+        rows.push(
+          tr({key: header.name},
+            td({className: "netInfoParamName"},
+              span({title: header.name}, header.name)
+            ),
+            td({className: "netInfoParamValue"}, header.value)
+          )
+        );
+      });
+
+      return (
+        tbody({},
+          rows
+        )
+      );
+    }
+  }));
+
+  // Exports from this module
+  exports.Headers = Headers;
+});
diff --git a/devtools/client/jsonview/components/json-panel.js b/devtools/client/jsonview/components/json-panel.js
new file mode 100644
index 000000000..c7280a0b1
--- /dev/null
+++ b/devtools/client/jsonview/components/json-panel.js
@@ -0,0 +1,194 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
+/* 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";
+
+define(function (require, exports, module) {
+  const { DOM: dom, createFactory, createClass, PropTypes } = require("devtools/client/shared/vendor/react");
+  const { createFactories } = require("devtools/client/shared/components/reps/rep-utils");
+  const TreeView = createFactory(require("devtools/client/shared/components/tree/tree-view"));
+  const { Rep } = createFactories(require("devtools/client/shared/components/reps/rep"));
+  const { SearchBox } = createFactories(require("./search-box"));
+  const { Toolbar, ToolbarButton } = createFactories(require("./reps/toolbar"));
+
+  const { div } = dom;
+  const AUTO_EXPAND_MAX_SIZE = 100 * 1024;
+  const AUTO_EXPAND_MAX_LEVEL = 7;
+
+  /**
+   * This template represents the 'JSON' panel. The panel is
+   * responsible for rendering an expandable tree that allows simple
+   * inspection of JSON structure.
+   */
+  let JsonPanel = createClass({
+    displayName: "JsonPanel",
+
+    propTypes: {
+      data: PropTypes.oneOfType([
+        PropTypes.string,
+        PropTypes.array,
+        PropTypes.object
+      ]),
+      jsonTextLength: PropTypes.number,
+      searchFilter: PropTypes.string,
+      actions: PropTypes.object,
+    },
+
+    getInitialState: function () {
+      return {};
+    },
+
+    componentDidMount: function () {
+      document.addEventListener("keypress", this.onKeyPress, true);
+    },
+
+    componentWillUnmount: function () {
+      document.removeEventListener("keypress", this.onKeyPress, true);
+    },
+
+    onKeyPress: function (e) {
+      // XXX shortcut for focusing the Filter field (see Bug 1178771).
+    },
+
+    onFilter: function (object) {
+      if (!this.props.searchFilter) {
+        return true;
+      }
+
+      let json = JSON.stringify(object).toLowerCase();
+      return json.indexOf(this.props.searchFilter.toLowerCase()) >= 0;
+    },
+
+    getExpandedNodes: function (object, path = "", level = 0) {
+      if (typeof object != "object") {
+        return null;
+      }
+
+      if (level > AUTO_EXPAND_MAX_LEVEL) {
+        return null;
+      }
+
+      let expandedNodes = new Set();
+      for (let prop in object) {
+        let nodePath = path + "/" + prop;
+        expandedNodes.add(nodePath);
+
+        let nodes = this.getExpandedNodes(object[prop], nodePath, level + 1);
+        if (nodes) {
+          expandedNodes = new Set([...expandedNodes, ...nodes]);
+        }
+      }
+      return expandedNodes;
+    },
+
+    renderValue: props => {
+      let member = props.member;
+
+      // Hide object summary when object is expanded (bug 1244912).
+      if (typeof member.value == "object" && member.open) {
+        return null;
+      }
+
+      // Render the value (summary) using Reps library.
+      return Rep(Object.assign({}, props, {
+        cropLimit: 50,
+      }));
+    },
+
+    renderTree: function () {
+      // Append custom column for displaying values. This column
+      // Take all available horizontal space.
+      let columns = [{
+        id: "value",
+        width: "100%"
+      }];
+
+      // Expand the document by default if its size isn't bigger than 100KB.
+      let expandedNodes = new Set();
+      if (this.props.jsonTextLength <= AUTO_EXPAND_MAX_SIZE) {
+        expandedNodes = this.getExpandedNodes(this.props.data);
+      }
+
+      // Render tree component.
+      return TreeView({
+        object: this.props.data,
+        mode: "tiny",
+        onFilter: this.onFilter,
+        columns: columns,
+        renderValue: this.renderValue,
+        expandedNodes: expandedNodes,
+      });
+    },
+
+    render: function () {
+      let content;
+      let data = this.props.data;
+
+      try {
+        if (typeof data == "object") {
+          content = this.renderTree();
+        } else {
+          content = div({className: "jsonParseError"},
+            data + ""
+          );
+        }
+      } catch (err) {
+        content = div({className: "jsonParseError"},
+          err + ""
+        );
+      }
+
+      return (
+        div({className: "jsonPanelBox"},
+          JsonToolbar({actions: this.props.actions}),
+          div({className: "panelContent"},
+            content
+          )
+        )
+      );
+    }
+  });
+
+  /**
+   * This template represents a toolbar within the 'JSON' panel.
+   */
+  let JsonToolbar = createFactory(createClass({
+    displayName: "JsonToolbar",
+
+    propTypes: {
+      actions: PropTypes.object,
+    },
+
+    // Commands
+
+    onSave: function (event) {
+      this.props.actions.onSaveJson();
+    },
+
+    onCopy: function (event) {
+      this.props.actions.onCopyJson();
+    },
+
+    render: function () {
+      return (
+        Toolbar({},
+          ToolbarButton({className: "btn save", onClick: this.onSave},
+            Locale.$STR("jsonViewer.Save")
+          ),
+          ToolbarButton({className: "btn copy", onClick: this.onCopy},
+            Locale.$STR("jsonViewer.Copy")
+          ),
+          SearchBox({
+            actions: this.props.actions
+          })
+        )
+      );
+    },
+  }));
+
+  // Exports from this module
+  exports.JsonPanel = JsonPanel;
+});
diff --git a/devtools/client/jsonview/components/main-tabbed-area.js b/devtools/client/jsonview/components/main-tabbed-area.js
new file mode 100644
index 000000000..ecba73807
--- /dev/null
+++ b/devtools/client/jsonview/components/main-tabbed-area.js
@@ -0,0 +1,89 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
+/* 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";
+
+define(function (require, exports, module) {
+  const { createClass, PropTypes } = require("devtools/client/shared/vendor/react");
+  const { createFactories } = require("devtools/client/shared/components/reps/rep-utils");
+  const { JsonPanel } = createFactories(require("./json-panel"));
+  const { TextPanel } = createFactories(require("./text-panel"));
+  const { HeadersPanel } = createFactories(require("./headers-panel"));
+  const { Tabs, TabPanel } = createFactories(require("devtools/client/shared/components/tabs/tabs"));
+
+  /**
+   * This object represents the root application template
+   * responsible for rendering the basic tab layout.
+   */
+  let MainTabbedArea = createClass({
+    displayName: "MainTabbedArea",
+
+    propTypes: {
+      jsonText: PropTypes.string,
+      tabActive: PropTypes.number,
+      actions: PropTypes.object,
+      headers: PropTypes.object,
+      searchFilter: PropTypes.string,
+      json: PropTypes.oneOfType([
+        PropTypes.string,
+        PropTypes.object,
+        PropTypes.array
+      ])
+    },
+
+    getInitialState: function () {
+      return {
+        json: {},
+        headers: {},
+        jsonText: this.props.jsonText,
+        tabActive: this.props.tabActive
+      };
+    },
+
+    onTabChanged: function (index) {
+      this.setState({tabActive: index});
+    },
+
+    render: function () {
+      return (
+        Tabs({
+          tabActive: this.state.tabActive,
+          onAfterChange: this.onTabChanged},
+          TabPanel({
+            className: "json",
+            title: Locale.$STR("jsonViewer.tab.JSON")},
+            JsonPanel({
+              data: this.props.json,
+              jsonTextLength: this.props.jsonText.length,
+              actions: this.props.actions,
+              searchFilter: this.state.searchFilter
+            })
+          ),
+          TabPanel({
+            className: "rawdata",
+            title: Locale.$STR("jsonViewer.tab.RawData")},
+            TextPanel({
+              data: this.state.jsonText,
+              actions: this.props.actions
+            })
+          ),
+          TabPanel({
+            className: "headers",
+            title: Locale.$STR("jsonViewer.tab.Headers")},
+            HeadersPanel({
+              data: this.props.headers,
+              actions: this.props.actions,
+              searchFilter: this.props.searchFilter
+            })
+          )
+        )
+      );
+    }
+  });
+
+  // Exports from this module
+  exports.MainTabbedArea = MainTabbedArea;
+});
diff --git a/devtools/client/jsonview/components/moz.build b/devtools/client/jsonview/components/moz.build
new file mode 100644
index 000000000..fa66c8709
--- /dev/null
+++ b/devtools/client/jsonview/components/moz.build
@@ -0,0 +1,18 @@
+# -*- 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/.
+
+DIRS += [
+    'reps'
+]
+
+DevToolsModules(
+    'headers-panel.js',
+    'headers.js',
+    'json-panel.js',
+    'main-tabbed-area.js',
+    'search-box.js',
+    'text-panel.js'
+)
diff --git a/devtools/client/jsonview/components/reps/moz.build b/devtools/client/jsonview/components/reps/moz.build
new file mode 100644
index 000000000..1d239b7bd
--- /dev/null
+++ b/devtools/client/jsonview/components/reps/moz.build
@@ -0,0 +1,9 @@
+# -*- 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/.
+
+DevToolsModules(
+    'toolbar.js',
+)
diff --git a/devtools/client/jsonview/components/reps/toolbar.js b/devtools/client/jsonview/components/reps/toolbar.js
new file mode 100644
index 000000000..52a35ffbe
--- /dev/null
+++ b/devtools/client/jsonview/components/reps/toolbar.js
@@ -0,0 +1,58 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
+/* 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";
+
+define(function (require, exports, module) {
+  const React = require("devtools/client/shared/vendor/react");
+  const DOM = React.DOM;
+
+  /**
+   * Renders a simple toolbar.
+   */
+  let Toolbar = React.createClass({
+    displayName: "Toolbar",
+
+    propTypes: {
+      children: React.PropTypes.oneOfType([
+        React.PropTypes.array,
+        React.PropTypes.element
+      ])
+    },
+
+    render: function () {
+      return (
+        DOM.div({className: "toolbar"},
+          this.props.children
+        )
+      );
+    }
+  });
+
+  /**
+   * Renders a simple toolbar button.
+   */
+  let ToolbarButton = React.createClass({
+    displayName: "ToolbarButton",
+
+    propTypes: {
+      active: React.PropTypes.bool,
+      disabled: React.PropTypes.bool,
+      children: React.PropTypes.string,
+    },
+
+    render: function () {
+      let props = Object.assign({className: "btn"}, this.props);
+      return (
+        DOM.button(props, this.props.children)
+      );
+    },
+  });
+
+  // Exports from this module
+  exports.Toolbar = Toolbar;
+  exports.ToolbarButton = ToolbarButton;
+});
diff --git a/devtools/client/jsonview/components/search-box.js b/devtools/client/jsonview/components/search-box.js
new file mode 100644
index 000000000..fc9bcbcb8
--- /dev/null
+++ b/devtools/client/jsonview/components/search-box.js
@@ -0,0 +1,55 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
+/* 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";
+
+define(function (require, exports, module) {
+  const { DOM: dom, createClass, PropTypes } = require("devtools/client/shared/vendor/react");
+
+  const { input } = dom;
+
+  // For smooth incremental searching (in case the user is typing quickly).
+  const searchDelay = 250;
+
+  /**
+   * This object represents a search box located at the
+   * top right corner of the application.
+   */
+  let SearchBox = createClass({
+    displayName: "SearchBox",
+
+    propTypes: {
+      actions: PropTypes.object,
+    },
+
+    onSearch: function (event) {
+      let searchBox = event.target;
+      let win = searchBox.ownerDocument.defaultView;
+
+      if (this.searchTimeout) {
+        win.clearTimeout(this.searchTimeout);
+      }
+
+      let callback = this.doSearch.bind(this, searchBox);
+      this.searchTimeout = win.setTimeout(callback, searchDelay);
+    },
+
+    doSearch: function (searchBox) {
+      this.props.actions.onSearch(searchBox.value);
+    },
+
+    render: function () {
+      return (
+        input({className: "searchBox",
+          placeholder: Locale.$STR("jsonViewer.filterJSON"),
+          onChange: this.onSearch})
+      );
+    },
+  });
+
+  // Exports from this module
+  exports.SearchBox = SearchBox;
+});
diff --git a/devtools/client/jsonview/components/text-panel.js b/devtools/client/jsonview/components/text-panel.js
new file mode 100644
index 000000000..1df2e349d
--- /dev/null
+++ b/devtools/client/jsonview/components/text-panel.js
@@ -0,0 +1,95 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
+/* 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";
+
+define(function (require, exports, module) {
+  const { DOM: dom, createFactory, createClass, PropTypes } = require("devtools/client/shared/vendor/react");
+  const { createFactories } = require("devtools/client/shared/components/reps/rep-utils");
+  const { Toolbar, ToolbarButton } = createFactories(require("./reps/toolbar"));
+  const { div, pre } = dom;
+
+  /**
+   * This template represents the 'Raw Data' panel displaying
+   * JSON as a text received from the server.
+   */
+  let TextPanel = createClass({
+    displayName: "TextPanel",
+
+    propTypes: {
+      actions: PropTypes.object,
+      data: PropTypes.string
+    },
+
+    getInitialState: function () {
+      return {};
+    },
+
+    render: function () {
+      return (
+        div({className: "textPanelBox"},
+          TextToolbar({actions: this.props.actions}),
+          div({className: "panelContent"},
+            pre({className: "data"},
+              this.props.data
+            )
+          )
+        )
+      );
+    }
+  });
+
+  /**
+   * This object represents a toolbar displayed within the
+   * 'Raw Data' panel.
+   */
+  let TextToolbar = createFactory(createClass({
+    displayName: "TextToolbar",
+
+    propTypes: {
+      actions: PropTypes.object,
+    },
+
+    // Commands
+
+    onPrettify: function (event) {
+      this.props.actions.onPrettify();
+    },
+
+    onSave: function (event) {
+      this.props.actions.onSaveJson();
+    },
+
+    onCopy: function (event) {
+      this.props.actions.onCopyJson();
+    },
+
+    render: function () {
+      return (
+        Toolbar({},
+          ToolbarButton({
+            className: "btn save",
+            onClick: this.onSave},
+            Locale.$STR("jsonViewer.Save")
+          ),
+          ToolbarButton({
+            className: "btn copy",
+            onClick: this.onCopy},
+            Locale.$STR("jsonViewer.Copy")
+          ),
+          ToolbarButton({
+            className: "btn prettyprint",
+            onClick: this.onPrettify},
+            Locale.$STR("jsonViewer.PrettyPrint")
+          )
+        )
+      );
+    },
+  }));
+
+  // Exports from this module
+  exports.TextPanel = TextPanel;
+});
diff --git a/devtools/client/jsonview/converter-child.js b/devtools/client/jsonview/converter-child.js
new file mode 100644
index 000000000..61aa0c9a3
--- /dev/null
+++ b/devtools/client/jsonview/converter-child.js
@@ -0,0 +1,345 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
+/* 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";
+
+const {Cc, Ci, components} = require("chrome");
+const Services = require("Services");
+const {Class} = require("sdk/core/heritage");
+const {Unknown} = require("sdk/platform/xpcom");
+const xpcom = require("sdk/platform/xpcom");
+const Events = require("sdk/dom/events");
+const Clipboard = require("sdk/clipboard");
+
+loader.lazyRequireGetter(this, "NetworkHelper",
+                               "devtools/shared/webconsole/network-helper");
+loader.lazyRequireGetter(this, "JsonViewUtils",
+                               "devtools/client/jsonview/utils");
+
+const childProcessMessageManager =
+  Cc["@mozilla.org/childprocessmessagemanager;1"]
+    .getService(Ci.nsISyncMessageSender);
+
+// Amount of space that will be allocated for the stream's backing-store.
+// Must be power of 2. Used to copy the data stream in onStopRequest.
+const SEGMENT_SIZE = Math.pow(2, 17);
+
+const JSON_VIEW_MIME_TYPE = "application/vnd.mozilla.json.view";
+const CONTRACT_ID = "@mozilla.org/streamconv;1?from=" +
+  JSON_VIEW_MIME_TYPE + "&to=*/*";
+const CLASS_ID = "{d8c9acee-dec5-11e4-8c75-1681e6b88ec1}";
+
+// Localization
+let jsonViewStrings = Services.strings.createBundle(
+  "chrome://devtools/locale/jsonview.properties");
+
+/**
+ * This object detects 'application/vnd.mozilla.json.view' content type
+ * and converts it into a JSON Viewer application that allows simple
+ * JSON inspection.
+ *
+ * Inspired by JSON View: https://github.com/bhollis/jsonview/
+ */
+let Converter = Class({
+  extends: Unknown,
+
+  interfaces: [
+    "nsIStreamConverter",
+    "nsIStreamListener",
+    "nsIRequestObserver"
+  ],
+
+  get wrappedJSObject() {
+    return this;
+  },
+
+  /**
+   * This component works as such:
+   * 1. asyncConvertData captures the listener
+   * 2. onStartRequest fires, initializes stuff, modifies the listener
+   *    to match our output type
+   * 3. onDataAvailable transcodes the data into a UTF-8 string
+   * 4. onStopRequest gets the collected data and converts it,
+   *    spits it to the listener
+   * 5. convert does nothing, it's just the synchronous version
+   *    of asyncConvertData
+   */
+  convert: function (fromStream, fromType, toType, ctx) {
+    return fromStream;
+  },
+
+  asyncConvertData: function (fromType, toType, listener, ctx) {
+    this.listener = listener;
+  },
+
+  onDataAvailable: function (request, context, inputStream, offset, count) {
+    // From https://developer.mozilla.org/en/Reading_textual_data
+    let is = Cc["@mozilla.org/intl/converter-input-stream;1"]
+      .createInstance(Ci.nsIConverterInputStream);
+    is.init(inputStream, this.charset, -1,
+      Ci.nsIConverterInputStream.DEFAULT_REPLACEMENT_CHARACTER);
+
+    // Seed it with something positive
+    while (count) {
+      let str = {};
+      let bytesRead = is.readString(count, str);
+      if (!bytesRead) {
+        break;
+      }
+      count -= bytesRead;
+      this.data += str.value;
+    }
+  },
+
+  onStartRequest: function (request, context) {
+    this.data = "";
+    this.uri = request.QueryInterface(Ci.nsIChannel).URI.spec;
+
+    // Sets the charset if it is available. (For documents loaded from the
+    // filesystem, this is not set.)
+    this.charset =
+      request.QueryInterface(Ci.nsIChannel).contentCharset || "UTF-8";
+
+    this.channel = request;
+    this.channel.contentType = "text/html";
+    this.channel.contentCharset = "UTF-8";
+    // Because content might still have a reference to this window,
+    // force setting it to a null principal to avoid it being same-
+    // origin with (other) content.
+    this.channel.loadInfo.resetPrincipalsToNullPrincipal();
+
+    this.listener.onStartRequest(this.channel, context);
+  },
+
+  /**
+   * This should go something like this:
+   * 1. Make sure we have a unicode string.
+   * 2. Convert it to a Javascript object.
+   * 2.1 Removes the callback
+   * 3. Convert that to HTML? Or XUL?
+   * 4. Spit it back out at the listener
+   */
+  onStopRequest: function (request, context, statusCode) {
+    let headers = {
+      response: [],
+      request: []
+    };
+
+    let win = NetworkHelper.getWindowForRequest(request);
+
+    let Locale = {
+      $STR: key => {
+        try {
+          return jsonViewStrings.GetStringFromName(key);
+        } catch (err) {
+          console.error(err);
+          return undefined;
+        }
+      }
+    };
+
+    JsonViewUtils.exportIntoContentScope(win, Locale, "Locale");
+
+    Events.once(win, "DOMContentLoaded", event => {
+      win.addEventListener("contentMessage",
+        this.onContentMessage.bind(this), false, true);
+    });
+
+    // The request doesn't have to be always nsIHttpChannel
+    // (e.g. in case of data: URLs)
+    if (request instanceof Ci.nsIHttpChannel) {
+      request.visitResponseHeaders({
+        visitHeader: function (name, value) {
+          headers.response.push({name: name, value: value});
+        }
+      });
+
+      request.visitRequestHeaders({
+        visitHeader: function (name, value) {
+          headers.request.push({name: name, value: value});
+        }
+      });
+    }
+
+    let outputDoc = "";
+
+    try {
+      headers = JSON.stringify(headers);
+      outputDoc = this.toHTML(this.data, headers, this.uri);
+    } catch (e) {
+      console.error("JSON Viewer ERROR " + e);
+      outputDoc = this.toErrorPage(e, this.data, this.uri);
+    }
+
+    let storage = Cc["@mozilla.org/storagestream;1"]
+      .createInstance(Ci.nsIStorageStream);
+
+    storage.init(SEGMENT_SIZE, 0xffffffff, null);
+    let out = storage.getOutputStream(0);
+
+    let binout = Cc["@mozilla.org/binaryoutputstream;1"]
+      .createInstance(Ci.nsIBinaryOutputStream);
+
+    binout.setOutputStream(out);
+    binout.writeUtf8Z(outputDoc);
+    binout.close();
+
+    // We need to trim 4 bytes off the front (this could be underlying bug).
+    let trunc = 4;
+    let instream = storage.newInputStream(trunc);
+
+    // Pass the data to the main content listener
+    this.listener.onDataAvailable(this.channel, context, instream, 0,
+      instream.available());
+
+    this.listener.onStopRequest(this.channel, context, statusCode);
+
+    this.listener = null;
+  },
+
+  htmlEncode: function (t) {
+    return t !== null ? t.toString()
+      .replace(/&/g, "&amp;")
+      .replace(/"/g, "&quot;")
+      .replace(/</g, "&lt;")
+      .replace(/>/g, "&gt;") : "";
+  },
+
+  toHTML: function (json, headers, title) {
+    let themeClassName = "theme-" + JsonViewUtils.getCurrentTheme();
+    let clientBaseUrl = "resource://devtools/client/";
+    let baseUrl = clientBaseUrl + "jsonview/";
+    let themeVarsUrl = clientBaseUrl + "themes/variables.css";
+    let commonUrl = clientBaseUrl + "themes/common.css";
+    let toolbarsUrl = clientBaseUrl + "themes/toolbars.css";
+
+    let os;
+    let platform = Services.appinfo.OS;
+    if (platform.startsWith("WINNT")) {
+      os = "win";
+    } else if (platform.startsWith("Darwin")) {
+      os = "mac";
+    } else {
+      os = "linux";
+    }
+
+    return "<!DOCTYPE html>\n" +
+      "<html platform=\"" + os + "\" class=\"" + themeClassName + "\">" +
+      "<head><title>" + this.htmlEncode(title) + "</title>" +
+      "<base href=\"" + this.htmlEncode(baseUrl) + "\">" +
+      "<link rel=\"stylesheet\" type=\"text/css\" href=\"" +
+        themeVarsUrl + "\">" +
+      "<link rel=\"stylesheet\" type=\"text/css\" href=\"" +
+        commonUrl + "\">" +
+      "<link rel=\"stylesheet\" type=\"text/css\" href=\"" +
+        toolbarsUrl + "\">" +
+      "<link rel=\"stylesheet\" type=\"text/css\" href=\"css/main.css\">" +
+      "<script data-main=\"viewer-config\" src=\"lib/require.js\"></script>" +
+      "</head><body>" +
+      "<div id=\"content\"></div>" +
+      "<div id=\"json\">" + this.htmlEncode(json) + "</div>" +
+      "<div id=\"headers\">" + this.htmlEncode(headers) + "</div>" +
+      "</body></html>";
+  },
+
+  toErrorPage: function (error, data, uri) {
+    // Escape unicode nulls
+    data = data.replace("\u0000", "\uFFFD");
+
+    let errorInfo = error + "";
+
+    let output = "<div id=\"error\">" + "error parsing";
+    if (errorInfo.message) {
+      output += "<div class=\"errormessage\">" + errorInfo.message + "</div>";
+    }
+
+    output += "</div><div id=\"json\">" + this.highlightError(data,
+      errorInfo.line, errorInfo.column) + "</div>";
+
+    return "<!DOCTYPE html>\n" +
+      "<html><head><title>" + this.htmlEncode(uri + " - Error") + "</title>" +
+      "<base href=\"" + this.htmlEncode(this.data.url()) + "\">" +
+      "</head><body>" +
+      output +
+      "</body></html>";
+  },
+
+  // Chrome <-> Content communication
+
+  onContentMessage: function (e) {
+    // Do not handle events from different documents.
+    let win = NetworkHelper.getWindowForRequest(this.channel);
+    if (win != e.target) {
+      return;
+    }
+
+    let value = e.detail.value;
+    switch (e.detail.type) {
+      case "copy":
+        Clipboard.set(value, "text");
+        break;
+
+      case "copy-headers":
+        this.copyHeaders(value);
+        break;
+
+      case "save":
+        childProcessMessageManager.sendAsyncMessage(
+          "devtools:jsonview:save", value);
+    }
+  },
+
+  copyHeaders: function (headers) {
+    let value = "";
+    let eol = (Services.appinfo.OS !== "WINNT") ? "\n" : "\r\n";
+
+    let responseHeaders = headers.response;
+    for (let i = 0; i < responseHeaders.length; i++) {
+      let header = responseHeaders[i];
+      value += header.name + ": " + header.value + eol;
+    }
+
+    value += eol;
+
+    let requestHeaders = headers.request;
+    for (let i = 0; i < requestHeaders.length; i++) {
+      let header = requestHeaders[i];
+      value += header.name + ": " + header.value + eol;
+    }
+
+    Clipboard.set(value, "text");
+  }
+});
+
+// Stream converter component definition
+let service = xpcom.Service({
+  id: components.ID(CLASS_ID),
+  contract: CONTRACT_ID,
+  Component: Converter,
+  register: false,
+  unregister: false
+});
+
+function register() {
+  if (!xpcom.isRegistered(service)) {
+    xpcom.register(service);
+    return true;
+  }
+  return false;
+}
+
+function unregister() {
+  if (xpcom.isRegistered(service)) {
+    xpcom.unregister(service);
+    return true;
+  }
+  return false;
+}
+
+exports.JsonViewService = {
+  register: register,
+  unregister: unregister
+};
diff --git a/devtools/client/jsonview/converter-observer.js b/devtools/client/jsonview/converter-observer.js
new file mode 100644
index 000000000..9b149c565
--- /dev/null
+++ b/devtools/client/jsonview/converter-observer.js
@@ -0,0 +1,97 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
+/* 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";
+
+const Cu = Components.utils;
+
+const {XPCOMUtils} = Cu.import("resource://gre/modules/XPCOMUtils.jsm", {});
+const {Services} = Cu.import("resource://gre/modules/Services.jsm", {});
+
+// Load devtools module lazily.
+XPCOMUtils.defineLazyGetter(this, "devtools", function () {
+  const {devtools} = Cu.import("resource://devtools/shared/Loader.jsm", {});
+  return devtools;
+});
+
+// Load JsonView services lazily.
+XPCOMUtils.defineLazyGetter(this, "JsonViewService", function () {
+  const {JsonViewService} = devtools.require("devtools/client/jsonview/converter-child");
+  return JsonViewService;
+});
+
+XPCOMUtils.defineLazyGetter(this, "JsonViewSniffer", function () {
+  const {JsonViewSniffer} = devtools.require("devtools/client/jsonview/converter-sniffer");
+  return JsonViewSniffer;
+});
+
+// Constants
+const JSON_VIEW_PREF = "devtools.jsonview.enabled";
+
+/**
+ * Listen for 'devtools.jsonview.enabled' preference changes and
+ * register/unregister the JSON View XPCOM services as appropriate.
+ */
+function ConverterObserver() {
+}
+
+ConverterObserver.prototype = {
+  initialize: function () {
+    // Only the DevEdition has this feature available by default.
+    // Users need to manually flip 'devtools.jsonview.enabled' preference
+    // to have it available in other distributions.
+    if (this.isEnabled()) {
+      this.register();
+    }
+
+    Services.prefs.addObserver(JSON_VIEW_PREF, this, false);
+    Services.obs.addObserver(this, "xpcom-shutdown", false);
+  },
+
+  observe: function (subject, topic, data) {
+    switch (topic) {
+      case "xpcom-shutdown":
+        this.onShutdown();
+        break;
+      case "nsPref:changed":
+        this.onPrefChanged();
+        break;
+    }
+  },
+
+  onShutdown: function () {
+    Services.prefs.removeObserver(JSON_VIEW_PREF, observer);
+    Services.obs.removeObserver(observer, "xpcom-shutdown");
+  },
+
+  onPrefChanged: function () {
+    if (this.isEnabled()) {
+      this.register();
+    } else {
+      this.unregister();
+    }
+  },
+
+  register: function () {
+    JsonViewSniffer.register();
+    JsonViewService.register();
+  },
+
+  unregister: function () {
+    JsonViewSniffer.unregister();
+    JsonViewService.unregister();
+  },
+
+  isEnabled: function () {
+    return Services.prefs.getBoolPref(JSON_VIEW_PREF);
+  },
+};
+
+// Listen to JSON View 'enable' pref and perform dynamic
+// registration or unregistration of the main application
+// component.
+var observer = new ConverterObserver();
+observer.initialize();
diff --git a/devtools/client/jsonview/converter-sniffer.js b/devtools/client/jsonview/converter-sniffer.js
new file mode 100644
index 000000000..65e5d2aad
--- /dev/null
+++ b/devtools/client/jsonview/converter-sniffer.js
@@ -0,0 +1,106 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
+/* 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";
+
+const {Cc, Ci, components} = require("chrome");
+const xpcom = require("sdk/platform/xpcom");
+const {Unknown} = require("sdk/platform/xpcom");
+const {Class} = require("sdk/core/heritage");
+
+const categoryManager = Cc["@mozilla.org/categorymanager;1"]
+  .getService(Ci.nsICategoryManager);
+
+loader.lazyRequireGetter(this, "NetworkHelper",
+  "devtools/shared/webconsole/network-helper");
+
+// Constants
+const JSON_TYPE = "application/json";
+const CONTRACT_ID = "@mozilla.org/devtools/jsonview-sniffer;1";
+const CLASS_ID = "{4148c488-dca1-49fc-a621-2a0097a62422}";
+const JSON_VIEW_MIME_TYPE = "application/vnd.mozilla.json.view";
+const JSON_VIEW_TYPE = "JSON View";
+const CONTENT_SNIFFER_CATEGORY = "net-content-sniffers";
+
+/**
+ * This component represents a sniffer (implements nsIContentSniffer
+ * interface) responsible for changing top level 'application/json'
+ * document types to: 'application/vnd.mozilla.json.view'.
+ *
+ * This internal type is consequently rendered by JSON View component
+ * that represents the JSON through a viewer interface.
+ */
+var Sniffer = Class({
+  extends: Unknown,
+
+  interfaces: [
+    "nsIContentSniffer",
+  ],
+
+  get wrappedJSObject() {
+    return this;
+  },
+
+  getMIMETypeFromContent: function (request, data, length) {
+    // JSON View is enabled only for top level loads only.
+    if (!NetworkHelper.isTopLevelLoad(request)) {
+      return "";
+    }
+
+    if (request instanceof Ci.nsIChannel) {
+      try {
+        if (request.contentDisposition ==
+          Ci.nsIChannel.DISPOSITION_ATTACHMENT) {
+          return "";
+        }
+      } catch (e) {
+        // Channel doesn't support content dispositions
+      }
+
+      // Check the response content type and if it's application/json
+      // change it to new internal type consumed by JSON View.
+      if (request.contentType == JSON_TYPE) {
+        return JSON_VIEW_MIME_TYPE;
+      }
+    }
+
+    return "";
+  }
+});
+
+var service = xpcom.Service({
+  id: components.ID(CLASS_ID),
+  contract: CONTRACT_ID,
+  Component: Sniffer,
+  register: false,
+  unregister: false
+});
+
+function register() {
+  if (!xpcom.isRegistered(service)) {
+    xpcom.register(service);
+    categoryManager.addCategoryEntry(CONTENT_SNIFFER_CATEGORY, JSON_VIEW_TYPE,
+      CONTRACT_ID, false, false);
+    return true;
+  }
+
+  return false;
+}
+
+function unregister() {
+  if (xpcom.isRegistered(service)) {
+    categoryManager.deleteCategoryEntry(CONTENT_SNIFFER_CATEGORY,
+      JSON_VIEW_TYPE, false);
+    xpcom.unregister(service);
+    return true;
+  }
+  return false;
+}
+
+exports.JsonViewSniffer = {
+  register: register,
+  unregister: unregister
+};
diff --git a/devtools/client/jsonview/css/general.css b/devtools/client/jsonview/css/general.css
new file mode 100644
index 000000000..0c68d65e7
--- /dev/null
+++ b/devtools/client/jsonview/css/general.css
@@ -0,0 +1,46 @@
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* 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/. */
+
+/******************************************************************************/
+/* General */
+
+body {
+  color: var(--theme-body-color);
+  background-color: var(--theme-body-background);
+  padding: 0;
+  margin: 0;
+  overflow-x: hidden;
+}
+
+*:focus {
+  outline: none !important;
+}
+
+#content {
+  height: 100%;
+}
+
+pre {
+  background-color: white;
+  border: none;
+  font-family: var(--monospace-font-family);
+}
+
+#json,
+#headers {
+  display: none;
+}
+
+/******************************************************************************/
+/* Dark Theme */
+
+body.theme-dark {
+  color: var(--theme-body-color);
+  background-color: var(--theme-body-background);
+}
+
+.theme-dark pre {
+  background-color: var(--theme-body-background);
+}
diff --git a/devtools/client/jsonview/css/headers-panel.css b/devtools/client/jsonview/css/headers-panel.css
new file mode 100644
index 000000000..89cec46e0
--- /dev/null
+++ b/devtools/client/jsonview/css/headers-panel.css
@@ -0,0 +1,78 @@
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* 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/. */
+
+/******************************************************************************/
+/* Headers Panel */
+
+.headersPanelBox {
+  height: 100%;
+}
+
+.headersPanelBox .netInfoHeadersTable {
+  overflow: auto;
+  height: 100%;
+}
+
+.headersPanelBox .netHeadersGroup {
+  padding: 10px;
+}
+
+.headersPanelBox td {
+  vertical-align: bottom;
+}
+
+.headersPanelBox .netInfoHeadersGroup {
+  color: var(--theme-body-color-alt);
+  margin-bottom: 10px;
+  border-bottom: 1px solid var(--theme-splitter-color);
+  padding-top: 8px;
+  padding-bottom: 4px;
+  font-weight: bold;
+  -moz-user-select: none;
+}
+
+.headersPanelBox .netInfoParamValue {
+  word-wrap: break-word;
+}
+
+.headersPanelBox .netInfoParamName {
+  padding: 2px 10px 0 0;
+  font-weight: bold;
+  vertical-align: top;
+  text-align: right;
+  white-space: nowrap;
+}
+
+/******************************************************************************/
+/* Theme colors have been generated/copied from Network Panel's header view */
+
+/* Light Theme */
+.theme-light .netInfoParamName {
+  color: var(--theme-highlight-red);
+}
+
+.theme-light .netInfoParamValue {
+  color: var(--theme-highlight-purple);
+}
+
+/* Dark Theme */
+.theme-dark .netInfoParamName {
+  color: var(--theme-highlight-purple);
+}
+
+.theme-dark .netInfoParamValue {
+  color: var(--theme-highlight-gray);
+}
+
+/* Firebug Theme */
+.theme-firebug .netInfoHeadersTable {
+  font-family: Lucida Grande, Tahoma, sans-serif;
+  font-size: 11px;
+  line-height: 12px;
+}
+
+.theme-firebug .netInfoParamValue {
+  font-family: var(--monospace-font-family);
+}
diff --git a/devtools/client/jsonview/css/json-panel.css b/devtools/client/jsonview/css/json-panel.css
new file mode 100644
index 000000000..b107d34a0
--- /dev/null
+++ b/devtools/client/jsonview/css/json-panel.css
@@ -0,0 +1,16 @@
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* 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/. */
+
+/******************************************************************************/
+/* JSON Panel */
+
+.jsonParseError {
+  font-size: 12px;
+  font-family: Lucida Grande, Tahoma, sans-serif;
+  line-height: 15px;
+  width: 100%;
+  padding: 10px;
+  color: red;
+}
diff --git a/devtools/client/jsonview/css/main.css b/devtools/client/jsonview/css/main.css
new file mode 100644
index 000000000..04f3cb87c
--- /dev/null
+++ b/devtools/client/jsonview/css/main.css
@@ -0,0 +1,59 @@
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* 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/. */
+
+@import "resource://devtools/client/shared/components/reps/reps.css";
+@import "resource://devtools/client/shared/components/tree/tree-view.css";
+@import "resource://devtools/client/shared/components/tabs/tabs.css";
+
+@import "general.css";
+@import "search-box.css";
+@import "toolbar.css";
+@import "json-panel.css";
+@import "text-panel.css";
+@import "headers-panel.css";
+
+/******************************************************************************/
+/* Panel Content */
+
+.panelContent {
+  overflow-y: auto;
+  width: 100%;
+}
+
+/* The tree takes the entire horizontal space within the panel content. */
+.panelContent .treeTable {
+  width: 100%;
+  font-family: var(--monospace-font-family);
+}
+
+:root[platform="linux"] .treeTable {
+  font-size: 80%; /* To handle big monospace font */
+}
+
+/* Make sure there is a little space between label and value columns. */
+.panelContent .treeTable .treeLabelCell {
+  padding-right: 17px;
+}
+
+/******************************************************************************/
+/* Theme Firebug */
+
+.theme-firebug .panelContent {
+  height: calc(100% - 30px);
+}
+
+/* JSON View is using bigger font-size for the main tabs so,
+  let's overwrite the default value. */
+.theme-firebug .tabs .tabs-navigation {
+  font-size: 14px;
+}
+
+/******************************************************************************/
+/* Theme Light & Theme Dark*/
+
+.theme-dark .panelContent,
+.theme-light .panelContent {
+  height: calc(100% - 27px);
+}
diff --git a/devtools/client/jsonview/css/moz.build b/devtools/client/jsonview/css/moz.build
new file mode 100644
index 000000000..e881b3469
--- /dev/null
+++ b/devtools/client/jsonview/css/moz.build
@@ -0,0 +1,16 @@
+# -*- 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/.
+
+DevToolsModules(
+    'general.css',
+    'headers-panel.css',
+    'json-panel.css',
+    'main.css',
+    'search-box.css',
+    'search.svg',
+    'text-panel.css',
+    'toolbar.css'
+)
diff --git a/devtools/client/jsonview/css/search-box.css b/devtools/client/jsonview/css/search-box.css
new file mode 100644
index 000000000..99615b648
--- /dev/null
+++ b/devtools/client/jsonview/css/search-box.css
@@ -0,0 +1,24 @@
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* 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/. */
+
+/******************************************************************************/
+/* Search Box */
+
+.searchBox {
+  height: 18px;
+  font: message-box;
+  background-color: var(--theme-body-background);
+  background-image: url("chrome://devtools/skin/images/filter.svg#filterinput");
+  background-repeat: no-repeat;
+  background-position: 2px center;
+  border: 1px solid var(--theme-splitter-color);
+  border-radius: 2px;
+  color: var(--theme-content-color1);
+  width: 200px;
+  margin-top: 0;
+  margin-right: 1px;
+  float: right;
+  padding-left: 20px;
+}
diff --git a/devtools/client/jsonview/css/search.svg b/devtools/client/jsonview/css/search.svg
new file mode 100644
index 000000000..53f2d3651
--- /dev/null
+++ b/devtools/client/jsonview/css/search.svg
@@ -0,0 +1,22 @@
+<!-- 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/. -->
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" xmlns:xlink="http://www.w3.org/1999/xlink">
+  <defs>
+    <linearGradient id="a">
+      <stop offset="0" stop-color="#427dc2"/>
+      <stop offset="1" stop-color="#5e9fce"/>
+    </linearGradient>
+    <linearGradient id="b">
+      <stop offset="0" stop-color="#2f5d93"/>
+      <stop offset="1" stop-color="#3a87bd"/>
+    </linearGradient>
+    <filter id="c" width="1.239" height="1.241" x="-.12" y="-.12" color-interpolation-filters="sRGB">
+      <feGaussianBlur stdDeviation=".637"/>
+    </filter>
+    <linearGradient id="d" x1="4.094" x2="4.094" y1="13.423" y2="2.743" xlink:href="#a" gradientUnits="userSpaceOnUse"/>
+    <linearGradient id="e" x1="8.711" x2="8.711" y1="13.58" y2="2.566" xlink:href="#b" gradientUnits="userSpaceOnUse"/>
+  </defs>
+  <path fill="#fff" stroke="#fff" stroke-width="1.5" d="M10.14 1.656c-2.35 0-4.25 1.9-4.25 4.25 0 .752.19 1.45.532 2.063L1.61 12.78l1.562 1.564 4.78-4.78c.64.384 1.387.592 2.19.592 2.35 0 4.25-1.9 4.25-4.25s-1.9-4.25-4.25-4.25zm0 1.532c1.504 0 2.72 1.214 2.72 2.718s-1.216 2.72-2.72 2.72c-1.503 0-2.718-1.216-2.718-2.72 0-1.504 1.215-2.718 2.72-2.718z" stroke-linejoin="round" filter="url(#c)"/>
+  <path fill="url(#d)" stroke="url(#e)" stroke-width=".6" d="M10 2C7.79 2 6 3.79 6 6c0 .828.256 1.612.688 2.25l-4.875 4.875 1.062 1.063L7.75 9.31C8.388 9.745 9.172 10 10 10c2.21 0 4-1.79 4-4s-1.79-4-4-4zm0 1c1.657 0 3 1.343 3 3s-1.343 3-3 3-3-1.343-3-3 1.343-3 3-3z" stroke-linejoin="round"/>
+</svg>
diff --git a/devtools/client/jsonview/css/text-panel.css b/devtools/client/jsonview/css/text-panel.css
new file mode 100644
index 000000000..99b238556
--- /dev/null
+++ b/devtools/client/jsonview/css/text-panel.css
@@ -0,0 +1,26 @@
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* 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/. */
+
+/******************************************************************************/
+/* Text Panel */
+
+.textPanelBox {
+  height: 100%;
+}
+
+.textPanelBox .data {
+  overflow: auto;
+  height: 100%;
+}
+
+.textPanelBox pre {
+  margin: 0;
+  font-family: var(--monospace-font-family);
+  color: var(--theme-content-color1);
+}
+
+:root[platform="linux"] .textPanelBox .data {
+  font-size: 80%; /* To handle big monospace font */
+}
diff --git a/devtools/client/jsonview/css/toolbar.css b/devtools/client/jsonview/css/toolbar.css
new file mode 100644
index 000000000..833b2119f
--- /dev/null
+++ b/devtools/client/jsonview/css/toolbar.css
@@ -0,0 +1,92 @@
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* 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/. */
+
+/******************************************************************************/
+/* Toolbar */
+
+.toolbar {
+  line-height: 20px;
+  height: 22px;
+  font: message-box;
+  padding: 4px 0 3px 0;
+}
+
+.toolbar .btn {
+  margin-left: 5px;
+  background-color: #E6E6E6;
+  border: 1px solid rgb(204, 204, 204);
+  text-decoration: none;
+  display: inline-block;
+  text-align: center;
+  white-space: nowrap;
+  vertical-align: middle;
+  cursor: pointer;
+  -moz-user-select: none;
+  padding: 0 2px;
+  border-radius: 2px;
+}
+
+.toolbar .btn::-moz-focus-inner {
+  border: 1px solid transparent;
+}
+
+/******************************************************************************/
+/* Firebug Theme */
+
+.theme-firebug .toolbar {
+  border-bottom: 1px solid rgb(170, 188, 207);
+  background-color: var(--theme-tab-toolbar-background) !important;
+  background-image: linear-gradient(rgba(255, 255, 255, 0.8), rgba(255, 255, 255, 0.2));
+}
+
+.theme-firebug .toolbar .btn {
+  border-radius: 2px;
+  color: #141414;
+  background-color: white;
+}
+
+.theme-firebug .toolbar .btn:hover {
+  color: #333;
+  background-color: #e6e6e6;
+  border-color: #adadad;
+}
+
+.theme-firebug .toolbar .btn:active {
+  background-image: none;
+  outline: 0;
+  box-shadow: inset 0 3px 5px rgba(0, 0, 0, .125);
+}
+
+/******************************************************************************/
+/* Light Theme & Dark Theme*/
+
+.theme-dark .toolbar,
+.theme-light .toolbar {
+  background-color: var(--theme-toolbar-background);
+  border-bottom: 1px solid var(--theme-splitter-color);
+  padding: 1px;
+  padding-left: 2px;
+}
+
+.theme-dark .toolbar .btn,
+.theme-light .toolbar .btn {
+  min-height: 18px;
+  color: var(--theme-content-color1);
+  text-shadow: none;
+  margin: 1px 2px 1px 2px;
+  border: none;
+  background-color: rgba(170, 170, 170, .2); /* --toolbar-tab-hover */
+  transition: background 0.05s ease-in-out;
+}
+
+.theme-dark .toolbar .btn:hover,
+.theme-light .toolbar .btn:hover {
+  background: rgba(170, 170, 170, .3); /* Splitters */
+}
+
+.theme-dark .toolbar .btn:not([disabled]):hover:active,
+.theme-light .toolbar .btn:not([disabled]):hover:active {
+  background: rgba(170, 170, 170, .4); /* --toolbar-tab-hover-active */
+}
diff --git a/devtools/client/jsonview/json-viewer.js b/devtools/client/jsonview/json-viewer.js
new file mode 100644
index 000000000..d96081da2
--- /dev/null
+++ b/devtools/client/jsonview/json-viewer.js
@@ -0,0 +1,112 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
+/* 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";
+
+define(function (require, exports, module) {
+  const { render } = require("devtools/client/shared/vendor/react-dom");
+  const { createFactories } = require("devtools/client/shared/components/reps/rep-utils");
+  const { MainTabbedArea } = createFactories(require("./components/main-tabbed-area"));
+
+  const json = document.getElementById("json");
+  const headers = document.getElementById("headers");
+
+  let jsonData;
+
+  try {
+    jsonData = JSON.parse(json.textContent);
+  } catch (err) {
+    jsonData = err + "";
+  }
+
+  // Application state object.
+  let input = {
+    jsonText: json.textContent,
+    jsonPretty: null,
+    json: jsonData,
+    headers: JSON.parse(headers.textContent),
+    tabActive: 0,
+    prettified: false
+  };
+
+  json.remove();
+  headers.remove();
+
+  /**
+   * Application actions/commands. This list implements all commands
+   * available for the JSON viewer.
+   */
+  input.actions = {
+    onCopyJson: function () {
+      dispatchEvent("copy", input.prettified ? input.jsonPretty : input.jsonText);
+    },
+
+    onSaveJson: function () {
+      dispatchEvent("save", input.prettified ? input.jsonPretty : input.jsonText);
+    },
+
+    onCopyHeaders: function () {
+      dispatchEvent("copy-headers", input.headers);
+    },
+
+    onSearch: function (value) {
+      theApp.setState({searchFilter: value});
+    },
+
+    onPrettify: function (data) {
+      if (input.prettified) {
+        theApp.setState({jsonText: input.jsonText});
+      } else {
+        if (!input.jsonPretty) {
+          input.jsonPretty = JSON.stringify(jsonData, null, "  ");
+        }
+        theApp.setState({jsonText: input.jsonPretty});
+      }
+
+      input.prettified = !input.prettified;
+    },
+  };
+
+  /**
+   * Helper for dispatching an event. It's handled in chrome scope.
+   *
+   * @param {String} type Event detail type
+   * @param {Object} value Event detail value
+   */
+  function dispatchEvent(type, value) {
+    let data = {
+      detail: {
+        type,
+        value,
+      }
+    };
+
+    let contentMessageEvent = new CustomEvent("contentMessage", data);
+    window.dispatchEvent(contentMessageEvent);
+  }
+
+  /**
+   * Render the main application component. It's the main tab bar displayed
+   * at the top of the window. This component also represents ReacJS root.
+   */
+  let content = document.getElementById("content");
+  let theApp = render(MainTabbedArea(input), content);
+
+  let onResize = event => {
+    window.document.body.style.height = window.innerHeight + "px";
+    window.document.body.style.width = window.innerWidth + "px";
+  };
+
+  window.addEventListener("resize", onResize);
+  onResize();
+
+  // Send notification event to the window. Can be useful for
+  // tests as well as extensions.
+  let event = new CustomEvent("JSONViewInitialized", {});
+  window.jsonViewInitialized = true;
+  window.dispatchEvent(event);
+});
+
diff --git a/devtools/client/jsonview/lib/moz.build b/devtools/client/jsonview/lib/moz.build
new file mode 100644
index 000000000..fff9a99f9
--- /dev/null
+++ b/devtools/client/jsonview/lib/moz.build
@@ -0,0 +1,9 @@
+# -*- 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/.
+
+DevToolsModules(
+    'require.js'
+)
diff --git a/devtools/client/jsonview/lib/require.js b/devtools/client/jsonview/lib/require.js
new file mode 100644
index 000000000..77a5bb1d3
--- /dev/null
+++ b/devtools/client/jsonview/lib/require.js
@@ -0,0 +1,2076 @@
+/** vim: et:ts=4:sw=4:sts=4
+ * @license RequireJS 2.1.15 Copyright (c) 2010-2014, The Dojo Foundation All Rights Reserved.
+ * Available via the MIT or new BSD license.
+ * see: http://github.com/jrburke/requirejs for details
+ */
+//Not using strict: uneven strict support in browsers, #392, and causes
+//problems with requirejs.exec()/transpiler plugins that may not be strict.
+/*jslint regexp: true, nomen: true, sloppy: true */
+/*global window, navigator, document, importScripts, setTimeout, opera */
+
+var requirejs, require, define;
+(function (global) {
+    var req, s, head, baseElement, dataMain, src,
+        interactiveScript, currentlyAddingScript, mainScript, subPath,
+        version = '2.1.15',
+        commentRegExp = /(\/\*([\s\S]*?)\*\/|([^:]|^)\/\/(.*)$)/mg,
+        cjsRequireRegExp = /[^.]\s*require\s*\(\s*["']([^'"\s]+)["']\s*\)/g,
+        jsSuffixRegExp = /\.js$/,
+        currDirRegExp = /^\.\//,
+        op = Object.prototype,
+        ostring = op.toString,
+        hasOwn = op.hasOwnProperty,
+        ap = Array.prototype,
+        apsp = ap.splice,
+        isBrowser = !!(typeof window !== 'undefined' && typeof navigator !== 'undefined' && window.document),
+        isWebWorker = !isBrowser && typeof importScripts !== 'undefined',
+        //PS3 indicates loaded and complete, but need to wait for complete
+        //specifically. Sequence is 'loading', 'loaded', execution,
+        // then 'complete'. The UA check is unfortunate, but not sure how
+        //to feature test w/o causing perf issues.
+        readyRegExp = isBrowser && navigator.platform === 'PLAYSTATION 3' ?
+                      /^complete$/ : /^(complete|loaded)$/,
+        defContextName = '_',
+        //Oh the tragedy, detecting opera. See the usage of isOpera for reason.
+        isOpera = typeof opera !== 'undefined' && opera.toString() === '[object Opera]',
+        contexts = {},
+        cfg = {},
+        globalDefQueue = [],
+        useInteractive = false;
+
+    function isFunction(it) {
+        return ostring.call(it) === '[object Function]';
+    }
+
+    function isArray(it) {
+        return ostring.call(it) === '[object Array]';
+    }
+
+    /**
+     * Helper function for iterating over an array. If the func returns
+     * a true value, it will break out of the loop.
+     */
+    function each(ary, func) {
+        if (ary) {
+            var i;
+            for (i = 0; i < ary.length; i += 1) {
+                if (ary[i] && func(ary[i], i, ary)) {
+                    break;
+                }
+            }
+        }
+    }
+
+    /**
+     * Helper function for iterating over an array backwards. If the func
+     * returns a true value, it will break out of the loop.
+     */
+    function eachReverse(ary, func) {
+        if (ary) {
+            var i;
+            for (i = ary.length - 1; i > -1; i -= 1) {
+                if (ary[i] && func(ary[i], i, ary)) {
+                    break;
+                }
+            }
+        }
+    }
+
+    function hasProp(obj, prop) {
+        return hasOwn.call(obj, prop);
+    }
+
+    function getOwn(obj, prop) {
+        return hasProp(obj, prop) && obj[prop];
+    }
+
+    /**
+     * Cycles over properties in an object and calls a function for each
+     * property value. If the function returns a truthy value, then the
+     * iteration is stopped.
+     */
+    function eachProp(obj, func) {
+        var prop;
+        for (prop in obj) {
+            if (hasProp(obj, prop)) {
+                if (func(obj[prop], prop)) {
+                    break;
+                }
+            }
+        }
+    }
+
+    /**
+     * Simple function to mix in properties from source into target,
+     * but only if target does not already have a property of the same name.
+     */
+    function mixin(target, source, force, deepStringMixin) {
+        if (source) {
+            eachProp(source, function (value, prop) {
+                if (force || !hasProp(target, prop)) {
+                    if (deepStringMixin && typeof value === 'object' && value &&
+                        !isArray(value) && !isFunction(value) &&
+                        !(value instanceof RegExp)) {
+
+                        if (!target[prop]) {
+                            target[prop] = {};
+                        }
+                        mixin(target[prop], value, force, deepStringMixin);
+                    } else {
+                        target[prop] = value;
+                    }
+                }
+            });
+        }
+        return target;
+    }
+
+    //Similar to Function.prototype.bind, but the 'this' object is specified
+    //first, since it is easier to read/figure out what 'this' will be.
+    function bind(obj, fn) {
+        return function () {
+            return fn.apply(obj, arguments);
+        };
+    }
+
+    function scripts() {
+        return document.getElementsByTagName('script');
+    }
+
+    function defaultOnError(err) {
+        throw err;
+    }
+
+    //Allow getting a global that is expressed in
+    //dot notation, like 'a.b.c'.
+    function getGlobal(value) {
+        if (!value) {
+            return value;
+        }
+        var g = global;
+        each(value.split('.'), function (part) {
+            g = g[part];
+        });
+        return g;
+    }
+
+    /**
+     * Constructs an error with a pointer to an URL with more information.
+     * @param {String} id the error ID that maps to an ID on a web page.
+     * @param {String} message human readable error.
+     * @param {Error} [err] the original error, if there is one.
+     *
+     * @returns {Error}
+     */
+    function makeError(id, msg, err, requireModules) {
+        var e = new Error(msg + '\nhttp://requirejs.org/docs/errors.html#' + id);
+        e.requireType = id;
+        e.requireModules = requireModules;
+        if (err) {
+            e.originalError = err;
+        }
+        return e;
+    }
+
+    if (typeof define !== 'undefined') {
+        //If a define is already in play via another AMD loader,
+        //do not overwrite.
+        return;
+    }
+
+    if (typeof requirejs !== 'undefined') {
+        if (isFunction(requirejs)) {
+            //Do not overwrite an existing requirejs instance.
+            return;
+        }
+        cfg = requirejs;
+        requirejs = undefined;
+    }
+
+    //Allow for a require config object
+    if (typeof require !== 'undefined' && !isFunction(require)) {
+        //assume it is a config object.
+        cfg = require;
+        require = undefined;
+    }
+
+    function newContext(contextName) {
+        var inCheckLoaded, Module, context, handlers,
+            checkLoadedTimeoutId,
+            config = {
+                //Defaults. Do not set a default for map
+                //config to speed up normalize(), which
+                //will run faster if there is no default.
+                waitSeconds: 7,
+                baseUrl: './',
+                paths: {},
+                bundles: {},
+                pkgs: {},
+                shim: {},
+                config: {}
+            },
+            registry = {},
+            //registry of just enabled modules, to speed
+            //cycle breaking code when lots of modules
+            //are registered, but not activated.
+            enabledRegistry = {},
+            undefEvents = {},
+            defQueue = [],
+            defined = {},
+            urlFetched = {},
+            bundlesMap = {},
+            requireCounter = 1,
+            unnormalizedCounter = 1;
+
+        /**
+         * Trims the . and .. from an array of path segments.
+         * It will keep a leading path segment if a .. will become
+         * the first path segment, to help with module name lookups,
+         * which act like paths, but can be remapped. But the end result,
+         * all paths that use this function should look normalized.
+         * NOTE: this method MODIFIES the input array.
+         * @param {Array} ary the array of path segments.
+         */
+        function trimDots(ary) {
+            var i, part;
+            for (i = 0; i < ary.length; i++) {
+                part = ary[i];
+                if (part === '.') {
+                    ary.splice(i, 1);
+                    i -= 1;
+                } else if (part === '..') {
+                    // If at the start, or previous value is still ..,
+                    // keep them so that when converted to a path it may
+                    // still work when converted to a path, even though
+                    // as an ID it is less than ideal. In larger point
+                    // releases, may be better to just kick out an error.
+                    if (i === 0 || (i == 1 && ary[2] === '..') || ary[i - 1] === '..') {
+                        continue;
+                    } else if (i > 0) {
+                        ary.splice(i - 1, 2);
+                        i -= 2;
+                    }
+                }
+            }
+        }
+
+        /**
+         * Given a relative module name, like ./something, normalize it to
+         * a real name that can be mapped to a path.
+         * @param {String} name the relative name
+         * @param {String} baseName a real name that the name arg is relative
+         * to.
+         * @param {Boolean} applyMap apply the map config to the value. Should
+         * only be done if this normalization is for a dependency ID.
+         * @returns {String} normalized name
+         */
+        function normalize(name, baseName, applyMap) {
+            var pkgMain, mapValue, nameParts, i, j, nameSegment, lastIndex,
+                foundMap, foundI, foundStarMap, starI, normalizedBaseParts,
+                baseParts = (baseName && baseName.split('/')),
+                map = config.map,
+                starMap = map && map['*'];
+
+            //Adjust any relative paths.
+            if (name) {
+                name = name.split('/');
+                lastIndex = name.length - 1;
+
+                // If wanting node ID compatibility, strip .js from end
+                // of IDs. Have to do this here, and not in nameToUrl
+                // because node allows either .js or non .js to map
+                // to same file.
+                if (config.nodeIdCompat && jsSuffixRegExp.test(name[lastIndex])) {
+                    name[lastIndex] = name[lastIndex].replace(jsSuffixRegExp, '');
+                }
+
+                // Starts with a '.' so need the baseName
+                if (name[0].charAt(0) === '.' && baseParts) {
+                    //Convert baseName to array, and lop off the last part,
+                    //so that . matches that 'directory' and not name of the baseName's
+                    //module. For instance, baseName of 'one/two/three', maps to
+                    //'one/two/three.js', but we want the directory, 'one/two' for
+                    //this normalization.
+                    normalizedBaseParts = baseParts.slice(0, baseParts.length - 1);
+                    name = normalizedBaseParts.concat(name);
+                }
+
+                trimDots(name);
+                name = name.join('/');
+            }
+
+            //Apply map config if available.
+            if (applyMap && map && (baseParts || starMap)) {
+                nameParts = name.split('/');
+
+                outerLoop: for (i = nameParts.length; i > 0; i -= 1) {
+                    nameSegment = nameParts.slice(0, i).join('/');
+
+                    if (baseParts) {
+                        //Find the longest baseName segment match in the config.
+                        //So, do joins on the biggest to smallest lengths of baseParts.
+                        for (j = baseParts.length; j > 0; j -= 1) {
+                            mapValue = getOwn(map, baseParts.slice(0, j).join('/'));
+
+                            //baseName segment has config, find if it has one for
+                            //this name.
+                            if (mapValue) {
+                                mapValue = getOwn(mapValue, nameSegment);
+                                if (mapValue) {
+                                    //Match, update name to the new value.
+                                    foundMap = mapValue;
+                                    foundI = i;
+                                    break outerLoop;
+                                }
+                            }
+                        }
+                    }
+
+                    //Check for a star map match, but just hold on to it,
+                    //if there is a shorter segment match later in a matching
+                    //config, then favor over this star map.
+                    if (!foundStarMap && starMap && getOwn(starMap, nameSegment)) {
+                        foundStarMap = getOwn(starMap, nameSegment);
+                        starI = i;
+                    }
+                }
+
+                if (!foundMap && foundStarMap) {
+                    foundMap = foundStarMap;
+                    foundI = starI;
+                }
+
+                if (foundMap) {
+                    nameParts.splice(0, foundI, foundMap);
+                    name = nameParts.join('/');
+                }
+            }
+
+            // If the name points to a package's name, use
+            // the package main instead.
+            pkgMain = getOwn(config.pkgs, name);
+
+            return pkgMain ? pkgMain : name;
+        }
+
+        function removeScript(name) {
+            if (isBrowser) {
+                each(scripts(), function (scriptNode) {
+                    if (scriptNode.getAttribute('data-requiremodule') === name &&
+                            scriptNode.getAttribute('data-requirecontext') === context.contextName) {
+                        scriptNode.parentNode.removeChild(scriptNode);
+                        return true;
+                    }
+                });
+            }
+        }
+
+        function hasPathFallback(id) {
+            var pathConfig = getOwn(config.paths, id);
+            if (pathConfig && isArray(pathConfig) && pathConfig.length > 1) {
+                //Pop off the first array value, since it failed, and
+                //retry
+                pathConfig.shift();
+                context.require.undef(id);
+
+                //Custom require that does not do map translation, since
+                //ID is "absolute", already mapped/resolved.
+                context.makeRequire(null, {
+                    skipMap: true
+                })([id]);
+
+                return true;
+            }
+        }
+
+        //Turns a plugin!resource to [plugin, resource]
+        //with the plugin being undefined if the name
+        //did not have a plugin prefix.
+        function splitPrefix(name) {
+            var prefix,
+                index = name ? name.indexOf('!') : -1;
+            if (index > -1) {
+                prefix = name.substring(0, index);
+                name = name.substring(index + 1, name.length);
+            }
+            return [prefix, name];
+        }
+
+        /**
+         * Creates a module mapping that includes plugin prefix, module
+         * name, and path. If parentModuleMap is provided it will
+         * also normalize the name via require.normalize()
+         *
+         * @param {String} name the module name
+         * @param {String} [parentModuleMap] parent module map
+         * for the module name, used to resolve relative names.
+         * @param {Boolean} isNormalized: is the ID already normalized.
+         * This is true if this call is done for a define() module ID.
+         * @param {Boolean} applyMap: apply the map config to the ID.
+         * Should only be true if this map is for a dependency.
+         *
+         * @returns {Object}
+         */
+        function makeModuleMap(name, parentModuleMap, isNormalized, applyMap) {
+            var url, pluginModule, suffix, nameParts,
+                prefix = null,
+                parentName = parentModuleMap ? parentModuleMap.name : null,
+                originalName = name,
+                isDefine = true,
+                normalizedName = '';
+
+            //If no name, then it means it is a require call, generate an
+            //internal name.
+            if (!name) {
+                isDefine = false;
+                name = '_@r' + (requireCounter += 1);
+            }
+
+            nameParts = splitPrefix(name);
+            prefix = nameParts[0];
+            name = nameParts[1];
+
+            if (prefix) {
+                prefix = normalize(prefix, parentName, applyMap);
+                pluginModule = getOwn(defined, prefix);
+            }
+
+            //Account for relative paths if there is a base name.
+            if (name) {
+                if (prefix) {
+                    if (pluginModule && pluginModule.normalize) {
+                        //Plugin is loaded, use its normalize method.
+                        normalizedName = pluginModule.normalize(name, function (name) {
+                            return normalize(name, parentName, applyMap);
+                        });
+                    } else {
+                        // If nested plugin references, then do not try to
+                        // normalize, as it will not normalize correctly. This
+                        // places a restriction on resourceIds, and the longer
+                        // term solution is not to normalize until plugins are
+                        // loaded and all normalizations to allow for async
+                        // loading of a loader plugin. But for now, fixes the
+                        // common uses. Details in #1131
+                        normalizedName = name.indexOf('!') === -1 ?
+                                         normalize(name, parentName, applyMap) :
+                                         name;
+                    }
+                } else {
+                    //A regular module.
+                    normalizedName = normalize(name, parentName, applyMap);
+
+                    //Normalized name may be a plugin ID due to map config
+                    //application in normalize. The map config values must
+                    //already be normalized, so do not need to redo that part.
+                    nameParts = splitPrefix(normalizedName);
+                    prefix = nameParts[0];
+                    normalizedName = nameParts[1];
+                    isNormalized = true;
+
+                    url = context.nameToUrl(normalizedName);
+                }
+            }
+
+            //If the id is a plugin id that cannot be determined if it needs
+            //normalization, stamp it with a unique ID so two matching relative
+            //ids that may conflict can be separate.
+            suffix = prefix && !pluginModule && !isNormalized ?
+                     '_unnormalized' + (unnormalizedCounter += 1) :
+                     '';
+
+            return {
+                prefix: prefix,
+                name: normalizedName,
+                parentMap: parentModuleMap,
+                unnormalized: !!suffix,
+                url: url,
+                originalName: originalName,
+                isDefine: isDefine,
+                id: (prefix ?
+                        prefix + '!' + normalizedName :
+                        normalizedName) + suffix
+            };
+        }
+
+        function getModule(depMap) {
+            var id = depMap.id,
+                mod = getOwn(registry, id);
+
+            if (!mod) {
+                mod = registry[id] = new context.Module(depMap);
+            }
+
+            return mod;
+        }
+
+        function on(depMap, name, fn) {
+            var id = depMap.id,
+                mod = getOwn(registry, id);
+
+            if (hasProp(defined, id) &&
+                    (!mod || mod.defineEmitComplete)) {
+                if (name === 'defined') {
+                    fn(defined[id]);
+                }
+            } else {
+                mod = getModule(depMap);
+                if (mod.error && name === 'error') {
+                    fn(mod.error);
+                } else {
+                    mod.on(name, fn);
+                }
+            }
+        }
+
+        function onError(err, errback) {
+            var ids = err.requireModules,
+                notified = false;
+
+            if (errback) {
+                errback(err);
+            } else {
+                each(ids, function (id) {
+                    var mod = getOwn(registry, id);
+                    if (mod) {
+                        //Set error on module, so it skips timeout checks.
+                        mod.error = err;
+                        if (mod.events.error) {
+                            notified = true;
+                            mod.emit('error', err);
+                        }
+                    }
+                });
+
+                if (!notified) {
+                    req.onError(err);
+                }
+            }
+        }
+
+        /**
+         * Internal method to transfer globalQueue items to this context's
+         * defQueue.
+         */
+        function takeGlobalQueue() {
+            //Push all the globalDefQueue items into the context's defQueue
+            if (globalDefQueue.length) {
+                //Array splice in the values since the context code has a
+                //local var ref to defQueue, so cannot just reassign the one
+                //on context.
+                apsp.apply(defQueue,
+                           [defQueue.length, 0].concat(globalDefQueue));
+                globalDefQueue = [];
+            }
+        }
+
+        handlers = {
+            'require': function (mod) {
+                if (mod.require) {
+                    return mod.require;
+                } else {
+                    return (mod.require = context.makeRequire(mod.map));
+                }
+            },
+            'exports': function (mod) {
+                mod.usingExports = true;
+                if (mod.map.isDefine) {
+                    if (mod.exports) {
+                        return (defined[mod.map.id] = mod.exports);
+                    } else {
+                        return (mod.exports = defined[mod.map.id] = {});
+                    }
+                }
+            },
+            'module': function (mod) {
+                if (mod.module) {
+                    return mod.module;
+                } else {
+                    return (mod.module = {
+                        id: mod.map.id,
+                        uri: mod.map.url,
+                        config: function () {
+                            return  getOwn(config.config, mod.map.id) || {};
+                        },
+                        exports: mod.exports || (mod.exports = {})
+                    });
+                }
+            }
+        };
+
+        function cleanRegistry(id) {
+            //Clean up machinery used for waiting modules.
+            delete registry[id];
+            delete enabledRegistry[id];
+        }
+
+        function breakCycle(mod, traced, processed) {
+            var id = mod.map.id;
+
+            if (mod.error) {
+                mod.emit('error', mod.error);
+            } else {
+                traced[id] = true;
+                each(mod.depMaps, function (depMap, i) {
+                    var depId = depMap.id,
+                        dep = getOwn(registry, depId);
+
+                    //Only force things that have not completed
+                    //being defined, so still in the registry,
+                    //and only if it has not been matched up
+                    //in the module already.
+                    if (dep && !mod.depMatched[i] && !processed[depId]) {
+                        if (getOwn(traced, depId)) {
+                            mod.defineDep(i, defined[depId]);
+                            mod.check(); //pass false?
+                        } else {
+                            breakCycle(dep, traced, processed);
+                        }
+                    }
+                });
+                processed[id] = true;
+            }
+        }
+
+        function checkLoaded() {
+            var err, usingPathFallback,
+                waitInterval = config.waitSeconds * 1000,
+                //It is possible to disable the wait interval by using waitSeconds of 0.
+                expired = waitInterval && (context.startTime + waitInterval) < new Date().getTime(),
+                noLoads = [],
+                reqCalls = [],
+                stillLoading = false,
+                needCycleCheck = true;
+
+            //Do not bother if this call was a result of a cycle break.
+            if (inCheckLoaded) {
+                return;
+            }
+
+            inCheckLoaded = true;
+
+            //Figure out the state of all the modules.
+            eachProp(enabledRegistry, function (mod) {
+                var map = mod.map,
+                    modId = map.id;
+
+                //Skip things that are not enabled or in error state.
+                if (!mod.enabled) {
+                    return;
+                }
+
+                if (!map.isDefine) {
+                    reqCalls.push(mod);
+                }
+
+                if (!mod.error) {
+                    //If the module should be executed, and it has not
+                    //been inited and time is up, remember it.
+                    if (!mod.inited && expired) {
+                        if (hasPathFallback(modId)) {
+                            usingPathFallback = true;
+                            stillLoading = true;
+                        } else {
+                            noLoads.push(modId);
+                            removeScript(modId);
+                        }
+                    } else if (!mod.inited && mod.fetched && map.isDefine) {
+                        stillLoading = true;
+                        if (!map.prefix) {
+                            //No reason to keep looking for unfinished
+                            //loading. If the only stillLoading is a
+                            //plugin resource though, keep going,
+                            //because it may be that a plugin resource
+                            //is waiting on a non-plugin cycle.
+                            return (needCycleCheck = false);
+                        }
+                    }
+                }
+            });
+
+            if (expired && noLoads.length) {
+                //If wait time expired, throw error of unloaded modules.
+                err = makeError('timeout', 'Load timeout for modules: ' + noLoads, null, noLoads);
+                err.contextName = context.contextName;
+                return onError(err);
+            }
+
+            //Not expired, check for a cycle.
+            if (needCycleCheck) {
+                each(reqCalls, function (mod) {
+                    breakCycle(mod, {}, {});
+                });
+            }
+
+            //If still waiting on loads, and the waiting load is something
+            //other than a plugin resource, or there are still outstanding
+            //scripts, then just try back later.
+            if ((!expired || usingPathFallback) && stillLoading) {
+                //Something is still waiting to load. Wait for it, but only
+                //if a timeout is not already in effect.
+                if ((isBrowser || isWebWorker) && !checkLoadedTimeoutId) {
+                    checkLoadedTimeoutId = setTimeout(function () {
+                        checkLoadedTimeoutId = 0;
+                        checkLoaded();
+                    }, 50);
+                }
+            }
+
+            inCheckLoaded = false;
+        }
+
+        Module = function (map) {
+            this.events = getOwn(undefEvents, map.id) || {};
+            this.map = map;
+            this.shim = getOwn(config.shim, map.id);
+            this.depExports = [];
+            this.depMaps = [];
+            this.depMatched = [];
+            this.pluginMaps = {};
+            this.depCount = 0;
+
+            /* this.exports this.factory
+               this.depMaps = [],
+               this.enabled, this.fetched
+            */
+        };
+
+        Module.prototype = {
+            init: function (depMaps, factory, errback, options) {
+                options = options || {};
+
+                //Do not do more inits if already done. Can happen if there
+                //are multiple define calls for the same module. That is not
+                //a normal, common case, but it is also not unexpected.
+                if (this.inited) {
+                    return;
+                }
+
+                this.factory = factory;
+
+                if (errback) {
+                    //Register for errors on this module.
+                    this.on('error', errback);
+                } else if (this.events.error) {
+                    //If no errback already, but there are error listeners
+                    //on this module, set up an errback to pass to the deps.
+                    errback = bind(this, function (err) {
+                        this.emit('error', err);
+                    });
+                }
+
+                //Do a copy of the dependency array, so that
+                //source inputs are not modified. For example
+                //"shim" deps are passed in here directly, and
+                //doing a direct modification of the depMaps array
+                //would affect that config.
+                this.depMaps = depMaps && depMaps.slice(0);
+
+                this.errback = errback;
+
+                //Indicate this module has be initialized
+                this.inited = true;
+
+                this.ignore = options.ignore;
+
+                //Could have option to init this module in enabled mode,
+                //or could have been previously marked as enabled. However,
+                //the dependencies are not known until init is called. So
+                //if enabled previously, now trigger dependencies as enabled.
+                if (options.enabled || this.enabled) {
+                    //Enable this module and dependencies.
+                    //Will call this.check()
+                    this.enable();
+                } else {
+                    this.check();
+                }
+            },
+
+            defineDep: function (i, depExports) {
+                //Because of cycles, defined callback for a given
+                //export can be called more than once.
+                if (!this.depMatched[i]) {
+                    this.depMatched[i] = true;
+                    this.depCount -= 1;
+                    this.depExports[i] = depExports;
+                }
+            },
+
+            fetch: function () {
+                if (this.fetched) {
+                    return;
+                }
+                this.fetched = true;
+
+                context.startTime = (new Date()).getTime();
+
+                var map = this.map;
+
+                //If the manager is for a plugin managed resource,
+                //ask the plugin to load it now.
+                if (this.shim) {
+                    context.makeRequire(this.map, {
+                        enableBuildCallback: true
+                    })(this.shim.deps || [], bind(this, function () {
+                        return map.prefix ? this.callPlugin() : this.load();
+                    }));
+                } else {
+                    //Regular dependency.
+                    return map.prefix ? this.callPlugin() : this.load();
+                }
+            },
+
+            load: function () {
+                var url = this.map.url;
+
+                //Regular dependency.
+                if (!urlFetched[url]) {
+                    urlFetched[url] = true;
+                    context.load(this.map.id, url);
+                }
+            },
+
+            /**
+             * Checks if the module is ready to define itself, and if so,
+             * define it.
+             */
+            check: function () {
+                if (!this.enabled || this.enabling) {
+                    return;
+                }
+
+                var err, cjsModule,
+                    id = this.map.id,
+                    depExports = this.depExports,
+                    exports = this.exports,
+                    factory = this.factory;
+
+                if (!this.inited) {
+                    this.fetch();
+                } else if (this.error) {
+                    this.emit('error', this.error);
+                } else if (!this.defining) {
+                    //The factory could trigger another require call
+                    //that would result in checking this module to
+                    //define itself again. If already in the process
+                    //of doing that, skip this work.
+                    this.defining = true;
+
+                    if (this.depCount < 1 && !this.defined) {
+                        if (isFunction(factory)) {
+                            //If there is an error listener, favor passing
+                            //to that instead of throwing an error. However,
+                            //only do it for define()'d  modules. require
+                            //errbacks should not be called for failures in
+                            //their callbacks (#699). However if a global
+                            //onError is set, use that.
+                            if ((this.events.error && this.map.isDefine) ||
+                                req.onError !== defaultOnError) {
+                                try {
+                                    exports = context.execCb(id, factory, depExports, exports);
+                                } catch (e) {
+                                    err = e;
+                                }
+                            } else {
+                                exports = context.execCb(id, factory, depExports, exports);
+                            }
+
+                            // Favor return value over exports. If node/cjs in play,
+                            // then will not have a return value anyway. Favor
+                            // module.exports assignment over exports object.
+                            if (this.map.isDefine && exports === undefined) {
+                                cjsModule = this.module;
+                                if (cjsModule) {
+                                    exports = cjsModule.exports;
+                                } else if (this.usingExports) {
+                                    //exports already set the defined value.
+                                    exports = this.exports;
+                                }
+                            }
+
+                            if (err) {
+                                err.requireMap = this.map;
+                                err.requireModules = this.map.isDefine ? [this.map.id] : null;
+                                err.requireType = this.map.isDefine ? 'define' : 'require';
+                                return onError((this.error = err));
+                            }
+
+                        } else {
+                            //Just a literal value
+                            exports = factory;
+                        }
+
+                        this.exports = exports;
+
+                        if (this.map.isDefine && !this.ignore) {
+                            defined[id] = exports;
+
+                            if (req.onResourceLoad) {
+                                req.onResourceLoad(context, this.map, this.depMaps);
+                            }
+                        }
+
+                        //Clean up
+                        cleanRegistry(id);
+
+                        this.defined = true;
+                    }
+
+                    //Finished the define stage. Allow calling check again
+                    //to allow define notifications below in the case of a
+                    //cycle.
+                    this.defining = false;
+
+                    if (this.defined && !this.defineEmitted) {
+                        this.defineEmitted = true;
+                        this.emit('defined', this.exports);
+                        this.defineEmitComplete = true;
+                    }
+
+                }
+            },
+
+            callPlugin: function () {
+                var map = this.map,
+                    id = map.id,
+                    //Map already normalized the prefix.
+                    pluginMap = makeModuleMap(map.prefix);
+
+                //Mark this as a dependency for this plugin, so it
+                //can be traced for cycles.
+                this.depMaps.push(pluginMap);
+
+                on(pluginMap, 'defined', bind(this, function (plugin) {
+                    var load, normalizedMap, normalizedMod,
+                        bundleId = getOwn(bundlesMap, this.map.id),
+                        name = this.map.name,
+                        parentName = this.map.parentMap ? this.map.parentMap.name : null,
+                        localRequire = context.makeRequire(map.parentMap, {
+                            enableBuildCallback: true
+                        });
+
+                    //If current map is not normalized, wait for that
+                    //normalized name to load instead of continuing.
+                    if (this.map.unnormalized) {
+                        //Normalize the ID if the plugin allows it.
+                        if (plugin.normalize) {
+                            name = plugin.normalize(name, function (name) {
+                                return normalize(name, parentName, true);
+                            }) || '';
+                        }
+
+                        //prefix and name should already be normalized, no need
+                        //for applying map config again either.
+                        normalizedMap = makeModuleMap(map.prefix + '!' + name,
+                                                      this.map.parentMap);
+                        on(normalizedMap,
+                            'defined', bind(this, function (value) {
+                                this.init([], function () { return value; }, null, {
+                                    enabled: true,
+                                    ignore: true
+                                });
+                            }));
+
+                        normalizedMod = getOwn(registry, normalizedMap.id);
+                        if (normalizedMod) {
+                            //Mark this as a dependency for this plugin, so it
+                            //can be traced for cycles.
+                            this.depMaps.push(normalizedMap);
+
+                            if (this.events.error) {
+                                normalizedMod.on('error', bind(this, function (err) {
+                                    this.emit('error', err);
+                                }));
+                            }
+                            normalizedMod.enable();
+                        }
+
+                        return;
+                    }
+
+                    //If a paths config, then just load that file instead to
+                    //resolve the plugin, as it is built into that paths layer.
+                    if (bundleId) {
+                        this.map.url = context.nameToUrl(bundleId);
+                        this.load();
+                        return;
+                    }
+
+                    load = bind(this, function (value) {
+                        this.init([], function () { return value; }, null, {
+                            enabled: true
+                        });
+                    });
+
+                    load.error = bind(this, function (err) {
+                        this.inited = true;
+                        this.error = err;
+                        err.requireModules = [id];
+
+                        //Remove temp unnormalized modules for this module,
+                        //since they will never be resolved otherwise now.
+                        eachProp(registry, function (mod) {
+                            if (mod.map.id.indexOf(id + '_unnormalized') === 0) {
+                                cleanRegistry(mod.map.id);
+                            }
+                        });
+
+                        onError(err);
+                    });
+
+                    //Allow plugins to load other code without having to know the
+                    //context or how to 'complete' the load.
+                    load.fromText = bind(this, function (text, textAlt) {
+                        /*jslint evil: true */
+                        var moduleName = map.name,
+                            moduleMap = makeModuleMap(moduleName),
+                            hasInteractive = useInteractive;
+
+                        //As of 2.1.0, support just passing the text, to reinforce
+                        //fromText only being called once per resource. Still
+                        //support old style of passing moduleName but discard
+                        //that moduleName in favor of the internal ref.
+                        if (textAlt) {
+                            text = textAlt;
+                        }
+
+                        //Turn off interactive script matching for IE for any define
+                        //calls in the text, then turn it back on at the end.
+                        if (hasInteractive) {
+                            useInteractive = false;
+                        }
+
+                        //Prime the system by creating a module instance for
+                        //it.
+                        getModule(moduleMap);
+
+                        //Transfer any config to this other module.
+                        if (hasProp(config.config, id)) {
+                            config.config[moduleName] = config.config[id];
+                        }
+
+                        try {
+                            req.exec(text);
+                        } catch (e) {
+                            return onError(makeError('fromtexteval',
+                                             'fromText eval for ' + id +
+                                            ' failed: ' + e,
+                                             e,
+                                             [id]));
+                        }
+
+                        if (hasInteractive) {
+                            useInteractive = true;
+                        }
+
+                        //Mark this as a dependency for the plugin
+                        //resource
+                        this.depMaps.push(moduleMap);
+
+                        //Support anonymous modules.
+                        context.completeLoad(moduleName);
+
+                        //Bind the value of that module to the value for this
+                        //resource ID.
+                        localRequire([moduleName], load);
+                    });
+
+                    //Use parentName here since the plugin's name is not reliable,
+                    //could be some weird string with no path that actually wants to
+                    //reference the parentName's path.
+                    plugin.load(map.name, localRequire, load, config);
+                }));
+
+                context.enable(pluginMap, this);
+                this.pluginMaps[pluginMap.id] = pluginMap;
+            },
+
+            enable: function () {
+                enabledRegistry[this.map.id] = this;
+                this.enabled = true;
+
+                //Set flag mentioning that the module is enabling,
+                //so that immediate calls to the defined callbacks
+                //for dependencies do not trigger inadvertent load
+                //with the depCount still being zero.
+                this.enabling = true;
+
+                //Enable each dependency
+                each(this.depMaps, bind(this, function (depMap, i) {
+                    var id, mod, handler;
+
+                    if (typeof depMap === 'string') {
+                        //Dependency needs to be converted to a depMap
+                        //and wired up to this module.
+                        depMap = makeModuleMap(depMap,
+                                               (this.map.isDefine ? this.map : this.map.parentMap),
+                                               false,
+                                               !this.skipMap);
+                        this.depMaps[i] = depMap;
+
+                        handler = getOwn(handlers, depMap.id);
+
+                        if (handler) {
+                            this.depExports[i] = handler(this);
+                            return;
+                        }
+
+                        this.depCount += 1;
+
+                        on(depMap, 'defined', bind(this, function (depExports) {
+                            this.defineDep(i, depExports);
+                            this.check();
+                        }));
+
+                        if (this.errback) {
+                            on(depMap, 'error', bind(this, this.errback));
+                        }
+                    }
+
+                    id = depMap.id;
+                    mod = registry[id];
+
+                    //Skip special modules like 'require', 'exports', 'module'
+                    //Also, don't call enable if it is already enabled,
+                    //important in circular dependency cases.
+                    if (!hasProp(handlers, id) && mod && !mod.enabled) {
+                        context.enable(depMap, this);
+                    }
+                }));
+
+                //Enable each plugin that is used in
+                //a dependency
+                eachProp(this.pluginMaps, bind(this, function (pluginMap) {
+                    var mod = getOwn(registry, pluginMap.id);
+                    if (mod && !mod.enabled) {
+                        context.enable(pluginMap, this);
+                    }
+                }));
+
+                this.enabling = false;
+
+                this.check();
+            },
+
+            on: function (name, cb) {
+                var cbs = this.events[name];
+                if (!cbs) {
+                    cbs = this.events[name] = [];
+                }
+                cbs.push(cb);
+            },
+
+            emit: function (name, evt) {
+                each(this.events[name], function (cb) {
+                    cb(evt);
+                });
+                if (name === 'error') {
+                    //Now that the error handler was triggered, remove
+                    //the listeners, since this broken Module instance
+                    //can stay around for a while in the registry.
+                    delete this.events[name];
+                }
+            }
+        };
+
+        function callGetModule(args) {
+            //Skip modules already defined.
+            if (!hasProp(defined, args[0])) {
+                getModule(makeModuleMap(args[0], null, true)).init(args[1], args[2]);
+            }
+        }
+
+        function removeListener(node, func, name, ieName) {
+            //Favor detachEvent because of IE9
+            //issue, see attachEvent/addEventListener comment elsewhere
+            //in this file.
+            if (node.detachEvent && !isOpera) {
+                //Probably IE. If not it will throw an error, which will be
+                //useful to know.
+                if (ieName) {
+                    node.detachEvent(ieName, func);
+                }
+            } else {
+                node.removeEventListener(name, func, false);
+            }
+        }
+
+        /**
+         * Given an event from a script node, get the requirejs info from it,
+         * and then removes the event listeners on the node.
+         * @param {Event} evt
+         * @returns {Object}
+         */
+        function getScriptData(evt) {
+            //Using currentTarget instead of target for Firefox 2.0's sake. Not
+            //all old browsers will be supported, but this one was easy enough
+            //to support and still makes sense.
+            var node = evt.currentTarget || evt.srcElement;
+
+            //Remove the listeners once here.
+            removeListener(node, context.onScriptLoad, 'load', 'onreadystatechange');
+            removeListener(node, context.onScriptError, 'error');
+
+            return {
+                node: node,
+                id: node && node.getAttribute('data-requiremodule')
+            };
+        }
+
+        function intakeDefines() {
+            var args;
+
+            //Any defined modules in the global queue, intake them now.
+            takeGlobalQueue();
+
+            //Make sure any remaining defQueue items get properly processed.
+            while (defQueue.length) {
+                args = defQueue.shift();
+                if (args[0] === null) {
+                    return onError(makeError('mismatch', 'Mismatched anonymous define() module: ' + args[args.length - 1]));
+                } else {
+                    //args are id, deps, factory. Should be normalized by the
+                    //define() function.
+                    callGetModule(args);
+                }
+            }
+        }
+
+        context = {
+            config: config,
+            contextName: contextName,
+            registry: registry,
+            defined: defined,
+            urlFetched: urlFetched,
+            defQueue: defQueue,
+            Module: Module,
+            makeModuleMap: makeModuleMap,
+            nextTick: req.nextTick,
+            onError: onError,
+
+            /**
+             * Set a configuration for the context.
+             * @param {Object} cfg config object to integrate.
+             */
+            configure: function (cfg) {
+                //Make sure the baseUrl ends in a slash.
+                if (cfg.baseUrl) {
+                    if (cfg.baseUrl.charAt(cfg.baseUrl.length - 1) !== '/') {
+                        cfg.baseUrl += '/';
+                    }
+                }
+
+                //Save off the paths since they require special processing,
+                //they are additive.
+                var shim = config.shim,
+                    objs = {
+                        paths: true,
+                        bundles: true,
+                        config: true,
+                        map: true
+                    };
+
+                eachProp(cfg, function (value, prop) {
+                    if (objs[prop]) {
+                        if (!config[prop]) {
+                            config[prop] = {};
+                        }
+                        mixin(config[prop], value, true, true);
+                    } else {
+                        config[prop] = value;
+                    }
+                });
+
+                //Reverse map the bundles
+                if (cfg.bundles) {
+                    eachProp(cfg.bundles, function (value, prop) {
+                        each(value, function (v) {
+                            if (v !== prop) {
+                                bundlesMap[v] = prop;
+                            }
+                        });
+                    });
+                }
+
+                //Merge shim
+                if (cfg.shim) {
+                    eachProp(cfg.shim, function (value, id) {
+                        //Normalize the structure
+                        if (isArray(value)) {
+                            value = {
+                                deps: value
+                            };
+                        }
+                        if ((value.exports || value.init) && !value.exportsFn) {
+                            value.exportsFn = context.makeShimExports(value);
+                        }
+                        shim[id] = value;
+                    });
+                    config.shim = shim;
+                }
+
+                //Adjust packages if necessary.
+                if (cfg.packages) {
+                    each(cfg.packages, function (pkgObj) {
+                        var location, name;
+
+                        pkgObj = typeof pkgObj === 'string' ? { name: pkgObj } : pkgObj;
+
+                        name = pkgObj.name;
+                        location = pkgObj.location;
+                        if (location) {
+                            config.paths[name] = pkgObj.location;
+                        }
+
+                        //Save pointer to main module ID for pkg name.
+                        //Remove leading dot in main, so main paths are normalized,
+                        //and remove any trailing .js, since different package
+                        //envs have different conventions: some use a module name,
+                        //some use a file name.
+                        config.pkgs[name] = pkgObj.name + '/' + (pkgObj.main || 'main')
+                                     .replace(currDirRegExp, '')
+                                     .replace(jsSuffixRegExp, '');
+                    });
+                }
+
+                //If there are any "waiting to execute" modules in the registry,
+                //update the maps for them, since their info, like URLs to load,
+                //may have changed.
+                eachProp(registry, function (mod, id) {
+                    //If module already has init called, since it is too
+                    //late to modify them, and ignore unnormalized ones
+                    //since they are transient.
+                    if (!mod.inited && !mod.map.unnormalized) {
+                        mod.map = makeModuleMap(id);
+                    }
+                });
+
+                //If a deps array or a config callback is specified, then call
+                //require with those args. This is useful when require is defined as a
+                //config object before require.js is loaded.
+                if (cfg.deps || cfg.callback) {
+                    context.require(cfg.deps || [], cfg.callback);
+                }
+            },
+
+            makeShimExports: function (value) {
+                function fn() {
+                    var ret;
+                    if (value.init) {
+                        ret = value.init.apply(global, arguments);
+                    }
+                    return ret || (value.exports && getGlobal(value.exports));
+                }
+                return fn;
+            },
+
+            makeRequire: function (relMap, options) {
+                options = options || {};
+
+                function localRequire(deps, callback, errback) {
+                    var id, map, requireMod;
+
+                    if (options.enableBuildCallback && callback && isFunction(callback)) {
+                        callback.__requireJsBuild = true;
+                    }
+
+                    if (typeof deps === 'string') {
+                        if (isFunction(callback)) {
+                            //Invalid call
+                            return onError(makeError('requireargs', 'Invalid require call'), errback);
+                        }
+
+                        //If require|exports|module are requested, get the
+                        //value for them from the special handlers. Caveat:
+                        //this only works while module is being defined.
+                        if (relMap && hasProp(handlers, deps)) {
+                            return handlers[deps](registry[relMap.id]);
+                        }
+
+                        //Synchronous access to one module. If require.get is
+                        //available (as in the Node adapter), prefer that.
+                        if (req.get) {
+                            return req.get(context, deps, relMap, localRequire);
+                        }
+
+                        //Normalize module name, if it contains . or ..
+                        map = makeModuleMap(deps, relMap, false, true);
+                        id = map.id;
+
+                        if (!hasProp(defined, id)) {
+                            return onError(makeError('notloaded', 'Module name "' +
+                                        id +
+                                        '" has not been loaded yet for context: ' +
+                                        contextName +
+                                        (relMap ? '' : '. Use require([])')));
+                        }
+                        return defined[id];
+                    }
+
+                    //Grab defines waiting in the global queue.
+                    intakeDefines();
+
+                    //Mark all the dependencies as needing to be loaded.
+                    context.nextTick(function () {
+                        //Some defines could have been added since the
+                        //require call, collect them.
+                        intakeDefines();
+
+                        requireMod = getModule(makeModuleMap(null, relMap));
+
+                        //Store if map config should be applied to this require
+                        //call for dependencies.
+                        requireMod.skipMap = options.skipMap;
+
+                        requireMod.init(deps, callback, errback, {
+                            enabled: true
+                        });
+
+                        checkLoaded();
+                    });
+
+                    return localRequire;
+                }
+
+                mixin(localRequire, {
+                    isBrowser: isBrowser,
+
+                    /**
+                     * Converts a module name + .extension into an URL path.
+                     * *Requires* the use of a module name. It does not support using
+                     * plain URLs like nameToUrl.
+                     */
+                    toUrl: function (moduleNamePlusExt) {
+                        var ext,
+                            index = moduleNamePlusExt.lastIndexOf('.'),
+                            segment = moduleNamePlusExt.split('/')[0],
+                            isRelative = segment === '.' || segment === '..';
+
+                        //Have a file extension alias, and it is not the
+                        //dots from a relative path.
+                        if (index !== -1 && (!isRelative || index > 1)) {
+                            ext = moduleNamePlusExt.substring(index, moduleNamePlusExt.length);
+                            moduleNamePlusExt = moduleNamePlusExt.substring(0, index);
+                        }
+
+                        return context.nameToUrl(normalize(moduleNamePlusExt,
+                                                relMap && relMap.id, true), ext,  true);
+                    },
+
+                    defined: function (id) {
+                        return hasProp(defined, makeModuleMap(id, relMap, false, true).id);
+                    },
+
+                    specified: function (id) {
+                        id = makeModuleMap(id, relMap, false, true).id;
+                        return hasProp(defined, id) || hasProp(registry, id);
+                    }
+                });
+
+                //Only allow undef on top level require calls
+                if (!relMap) {
+                    localRequire.undef = function (id) {
+                        //Bind any waiting define() calls to this context,
+                        //fix for #408
+                        takeGlobalQueue();
+
+                        var map = makeModuleMap(id, relMap, true),
+                            mod = getOwn(registry, id);
+
+                        removeScript(id);
+
+                        delete defined[id];
+                        delete urlFetched[map.url];
+                        delete undefEvents[id];
+
+                        //Clean queued defines too. Go backwards
+                        //in array so that the splices do not
+                        //mess up the iteration.
+                        eachReverse(defQueue, function(args, i) {
+                            if(args[0] === id) {
+                                defQueue.splice(i, 1);
+                            }
+                        });
+
+                        if (mod) {
+                            //Hold on to listeners in case the
+                            //module will be attempted to be reloaded
+                            //using a different config.
+                            if (mod.events.defined) {
+                                undefEvents[id] = mod.events;
+                            }
+
+                            cleanRegistry(id);
+                        }
+                    };
+                }
+
+                return localRequire;
+            },
+
+            /**
+             * Called to enable a module if it is still in the registry
+             * awaiting enablement. A second arg, parent, the parent module,
+             * is passed in for context, when this method is overridden by
+             * the optimizer. Not shown here to keep code compact.
+             */
+            enable: function (depMap) {
+                var mod = getOwn(registry, depMap.id);
+                if (mod) {
+                    getModule(depMap).enable();
+                }
+            },
+
+            /**
+             * Internal method used by environment adapters to complete a load event.
+             * A load event could be a script load or just a load pass from a synchronous
+             * load call.
+             * @param {String} moduleName the name of the module to potentially complete.
+             */
+            completeLoad: function (moduleName) {
+                var found, args, mod,
+                    shim = getOwn(config.shim, moduleName) || {},
+                    shExports = shim.exports;
+
+                takeGlobalQueue();
+
+                while (defQueue.length) {
+                    args = defQueue.shift();
+                    if (args[0] === null) {
+                        args[0] = moduleName;
+                        //If already found an anonymous module and bound it
+                        //to this name, then this is some other anon module
+                        //waiting for its completeLoad to fire.
+                        if (found) {
+                            break;
+                        }
+                        found = true;
+                    } else if (args[0] === moduleName) {
+                        //Found matching define call for this script!
+                        found = true;
+                    }
+
+                    callGetModule(args);
+                }
+
+                //Do this after the cycle of callGetModule in case the result
+                //of those calls/init calls changes the registry.
+                mod = getOwn(registry, moduleName);
+
+                if (!found && !hasProp(defined, moduleName) && mod && !mod.inited) {
+                    if (config.enforceDefine && (!shExports || !getGlobal(shExports))) {
+                        if (hasPathFallback(moduleName)) {
+                            return;
+                        } else {
+                            return onError(makeError('nodefine',
+                                             'No define call for ' + moduleName,
+                                             null,
+                                             [moduleName]));
+                        }
+                    } else {
+                        //A script that does not call define(), so just simulate
+                        //the call for it.
+                        callGetModule([moduleName, (shim.deps || []), shim.exportsFn]);
+                    }
+                }
+
+                checkLoaded();
+            },
+
+            /**
+             * Converts a module name to a file path. Supports cases where
+             * moduleName may actually be just an URL.
+             * Note that it **does not** call normalize on the moduleName,
+             * it is assumed to have already been normalized. This is an
+             * internal API, not a public one. Use toUrl for the public API.
+             */
+            nameToUrl: function (moduleName, ext, skipExt) {
+                var paths, syms, i, parentModule, url,
+                    parentPath, bundleId,
+                    pkgMain = getOwn(config.pkgs, moduleName);
+
+                if (pkgMain) {
+                    moduleName = pkgMain;
+                }
+
+                bundleId = getOwn(bundlesMap, moduleName);
+
+                if (bundleId) {
+                    return context.nameToUrl(bundleId, ext, skipExt);
+                }
+
+                //If a colon is in the URL, it indicates a protocol is used and it is just
+                //an URL to a file, or if it starts with a slash, contains a query arg (i.e. ?)
+                //or ends with .js, then assume the user meant to use an url and not a module id.
+                //The slash is important for protocol-less URLs as well as full paths.
+                if (req.jsExtRegExp.test(moduleName)) {
+                    //Just a plain path, not module name lookup, so just return it.
+                    //Add extension if it is included. This is a bit wonky, only non-.js things pass
+                    //an extension, this method probably needs to be reworked.
+                    url = moduleName + (ext || '');
+                } else {
+                    //A module that needs to be converted to a path.
+                    paths = config.paths;
+
+                    syms = moduleName.split('/');
+                    //For each module name segment, see if there is a path
+                    //registered for it. Start with most specific name
+                    //and work up from it.
+                    for (i = syms.length; i > 0; i -= 1) {
+                        parentModule = syms.slice(0, i).join('/');
+
+                        parentPath = getOwn(paths, parentModule);
+                        if (parentPath) {
+                            //If an array, it means there are a few choices,
+                            //Choose the one that is desired
+                            if (isArray(parentPath)) {
+                                parentPath = parentPath[0];
+                            }
+                            syms.splice(0, i, parentPath);
+                            break;
+                        }
+                    }
+
+                    //Join the path parts together, then figure out if baseUrl is needed.
+                    url = syms.join('/');
+                    url += (ext || (/^data\:|\?/.test(url) || skipExt ? '' : '.js'));
+                    url = (url.charAt(0) === '/' || url.match(/^[\w\+\.\-]+:/) ? '' : config.baseUrl) + url;
+                }
+
+                return config.urlArgs ? url +
+                                        ((url.indexOf('?') === -1 ? '?' : '&') +
+                                         config.urlArgs) : url;
+            },
+
+            //Delegates to req.load. Broken out as a separate function to
+            //allow overriding in the optimizer.
+            load: function (id, url) {
+                req.load(context, id, url);
+            },
+
+            /**
+             * Executes a module callback function. Broken out as a separate function
+             * solely to allow the build system to sequence the files in the built
+             * layer in the right sequence.
+             *
+             * @private
+             */
+            execCb: function (name, callback, args, exports) {
+                return callback.apply(exports, args);
+            },
+
+            /**
+             * callback for script loads, used to check status of loading.
+             *
+             * @param {Event} evt the event from the browser for the script
+             * that was loaded.
+             */
+            onScriptLoad: function (evt) {
+                //Using currentTarget instead of target for Firefox 2.0's sake. Not
+                //all old browsers will be supported, but this one was easy enough
+                //to support and still makes sense.
+                if (evt.type === 'load' ||
+                        (readyRegExp.test((evt.currentTarget || evt.srcElement).readyState))) {
+                    //Reset interactive script so a script node is not held onto for
+                    //to long.
+                    interactiveScript = null;
+
+                    //Pull out the name of the module and the context.
+                    var data = getScriptData(evt);
+                    context.completeLoad(data.id);
+                }
+            },
+
+            /**
+             * Callback for script errors.
+             */
+            onScriptError: function (evt) {
+                var data = getScriptData(evt);
+                if (!hasPathFallback(data.id)) {
+                    return onError(makeError('scripterror', 'Script error for: ' + data.id, evt, [data.id]));
+                }
+            }
+        };
+
+        context.require = context.makeRequire();
+        return context;
+    }
+
+    /**
+     * Main entry point.
+     *
+     * If the only argument to require is a string, then the module that
+     * is represented by that string is fetched for the appropriate context.
+     *
+     * If the first argument is an array, then it will be treated as an array
+     * of dependency string names to fetch. An optional function callback can
+     * be specified to execute when all of those dependencies are available.
+     *
+     * Make a local req variable to help Caja compliance (it assumes things
+     * on a require that are not standardized), and to give a short
+     * name for minification/local scope use.
+     */
+    req = requirejs = function (deps, callback, errback, optional) {
+
+        //Find the right context, use default
+        var context, config,
+            contextName = defContextName;
+
+        // Determine if have config object in the call.
+        if (!isArray(deps) && typeof deps !== 'string') {
+            // deps is a config object
+            config = deps;
+            if (isArray(callback)) {
+                // Adjust args if there are dependencies
+                deps = callback;
+                callback = errback;
+                errback = optional;
+            } else {
+                deps = [];
+            }
+        }
+
+        if (config && config.context) {
+            contextName = config.context;
+        }
+
+        context = getOwn(contexts, contextName);
+        if (!context) {
+            context = contexts[contextName] = req.s.newContext(contextName);
+        }
+
+        if (config) {
+            context.configure(config);
+        }
+
+        return context.require(deps, callback, errback);
+    };
+
+    /**
+     * Support require.config() to make it easier to cooperate with other
+     * AMD loaders on globally agreed names.
+     */
+    req.config = function (config) {
+        return req(config);
+    };
+
+    /**
+     * Execute something after the current tick
+     * of the event loop. Override for other envs
+     * that have a better solution than setTimeout.
+     * @param  {Function} fn function to execute later.
+     */
+    req.nextTick = typeof setTimeout !== 'undefined' ? function (fn) {
+        setTimeout(fn, 4);
+    } : function (fn) { fn(); };
+
+    /**
+     * Export require as a global, but only if it does not already exist.
+     */
+    if (!require) {
+        require = req;
+    }
+
+    req.version = version;
+
+    //Used to filter out dependencies that are already paths.
+    req.jsExtRegExp = /^\/|:|\?|\.js$/;
+    req.isBrowser = isBrowser;
+    s = req.s = {
+        contexts: contexts,
+        newContext: newContext
+    };
+
+    //Create default context.
+    req({});
+
+    //Exports some context-sensitive methods on global require.
+    each([
+        'toUrl',
+        'undef',
+        'defined',
+        'specified'
+    ], function (prop) {
+        //Reference from contexts instead of early binding to default context,
+        //so that during builds, the latest instance of the default context
+        //with its config gets used.
+        req[prop] = function () {
+            var ctx = contexts[defContextName];
+            return ctx.require[prop].apply(ctx, arguments);
+        };
+    });
+
+    if (isBrowser) {
+        head = s.head = document.getElementsByTagName('head')[0];
+        //If BASE tag is in play, using appendChild is a problem for IE6.
+        //When that browser dies, this can be removed. Details in this jQuery bug:
+        //http://dev.jquery.com/ticket/2709
+        baseElement = document.getElementsByTagName('base')[0];
+        if (baseElement) {
+            head = s.head = baseElement.parentNode;
+        }
+    }
+
+    /**
+     * Any errors that require explicitly generates will be passed to this
+     * function. Intercept/override it if you want custom error handling.
+     * @param {Error} err the error object.
+     */
+    req.onError = defaultOnError;
+
+    /**
+     * Creates the node for the load command. Only used in browser envs.
+     */
+    req.createNode = function (config, moduleName, url) {
+        var node = config.xhtml ?
+                document.createElementNS('http://www.w3.org/1999/xhtml', 'html:script') :
+                document.createElement('script');
+        node.type = config.scriptType || 'text/javascript';
+        node.charset = 'utf-8';
+        node.async = true;
+        return node;
+    };
+
+    /**
+     * Does the request to load a module for the browser case.
+     * Make this a separate function to allow other environments
+     * to override it.
+     *
+     * @param {Object} context the require context to find state.
+     * @param {String} moduleName the name of the module.
+     * @param {Object} url the URL to the module.
+     */
+    req.load = function (context, moduleName, url) {
+        var config = (context && context.config) || {},
+            node;
+        if (isBrowser) {
+            //In the browser so use a script tag
+            node = req.createNode(config, moduleName, url);
+
+            node.setAttribute('data-requirecontext', context.contextName);
+            node.setAttribute('data-requiremodule', moduleName);
+
+            //Set up load listener. Test attachEvent first because IE9 has
+            //a subtle issue in its addEventListener and script onload firings
+            //that do not match the behavior of all other browsers with
+            //addEventListener support, which fire the onload event for a
+            //script right after the script execution. See:
+            //https://connect.microsoft.com/IE/feedback/details/648057/script-onload-event-is-not-fired-immediately-after-script-execution
+            //UNFORTUNATELY Opera implements attachEvent but does not follow the script
+            //script execution mode.
+            if (node.attachEvent &&
+                    //Check if node.attachEvent is artificially added by custom script or
+                    //natively supported by browser
+                    //read https://github.com/jrburke/requirejs/issues/187
+                    //if we can NOT find [native code] then it must NOT natively supported.
+                    //in IE8, node.attachEvent does not have toString()
+                    //Note the test for "[native code" with no closing brace, see:
+                    //https://github.com/jrburke/requirejs/issues/273
+                    !(node.attachEvent.toString && node.attachEvent.toString().indexOf('[native code') < 0) &&
+                    !isOpera) {
+                //Probably IE. IE (at least 6-8) do not fire
+                //script onload right after executing the script, so
+                //we cannot tie the anonymous define call to a name.
+                //However, IE reports the script as being in 'interactive'
+                //readyState at the time of the define call.
+                useInteractive = true;
+
+                node.attachEvent('onreadystatechange', context.onScriptLoad);
+                //It would be great to add an error handler here to catch
+                //404s in IE9+. However, onreadystatechange will fire before
+                //the error handler, so that does not help. If addEventListener
+                //is used, then IE will fire error before load, but we cannot
+                //use that pathway given the connect.microsoft.com issue
+                //mentioned above about not doing the 'script execute,
+                //then fire the script load event listener before execute
+                //next script' that other browsers do.
+                //Best hope: IE10 fixes the issues,
+                //and then destroys all installs of IE 6-9.
+                //node.attachEvent('onerror', context.onScriptError);
+            } else {
+                node.addEventListener('load', context.onScriptLoad, false);
+                node.addEventListener('error', context.onScriptError, false);
+            }
+            node.src = url;
+
+            //For some cache cases in IE 6-8, the script executes before the end
+            //of the appendChild execution, so to tie an anonymous define
+            //call to the module name (which is stored on the node), hold on
+            //to a reference to this node, but clear after the DOM insertion.
+            currentlyAddingScript = node;
+            if (baseElement) {
+                head.insertBefore(node, baseElement);
+            } else {
+                head.appendChild(node);
+            }
+            currentlyAddingScript = null;
+
+            return node;
+        } else if (isWebWorker) {
+            try {
+                //In a web worker, use importScripts. This is not a very
+                //efficient use of importScripts, importScripts will block until
+                //its script is downloaded and evaluated. However, if web workers
+                //are in play, the expectation that a build has been done so that
+                //only one script needs to be loaded anyway. This may need to be
+                //reevaluated if other use cases become common.
+                importScripts(url);
+
+                //Account for anonymous modules
+                context.completeLoad(moduleName);
+            } catch (e) {
+                context.onError(makeError('importscripts',
+                                'importScripts failed for ' +
+                                    moduleName + ' at ' + url,
+                                e,
+                                [moduleName]));
+            }
+        }
+    };
+
+    function getInteractiveScript() {
+        if (interactiveScript && interactiveScript.readyState === 'interactive') {
+            return interactiveScript;
+        }
+
+        eachReverse(scripts(), function (script) {
+            if (script.readyState === 'interactive') {
+                return (interactiveScript = script);
+            }
+        });
+        return interactiveScript;
+    }
+
+    //Look for a data-main script attribute, which could also adjust the baseUrl.
+    if (isBrowser && !cfg.skipDataMain) {
+        //Figure out baseUrl. Get it from the script tag with require.js in it.
+        eachReverse(scripts(), function (script) {
+            //Set the 'head' where we can append children by
+            //using the script's parent.
+            if (!head) {
+                head = script.parentNode;
+            }
+
+            //Look for a data-main attribute to set main script for the page
+            //to load. If it is there, the path to data main becomes the
+            //baseUrl, if it is not already set.
+            dataMain = script.getAttribute('data-main');
+            if (dataMain) {
+                //Preserve dataMain in case it is a path (i.e. contains '?')
+                mainScript = dataMain;
+
+                //Set final baseUrl if there is not already an explicit one.
+                if (!cfg.baseUrl) {
+                    //Pull off the directory of data-main for use as the
+                    //baseUrl.
+                    src = mainScript.split('/');
+                    mainScript = src.pop();
+                    subPath = src.length ? src.join('/')  + '/' : './';
+
+                    cfg.baseUrl = subPath;
+                }
+
+                //Strip off any trailing .js since mainScript is now
+                //like a module name.
+                mainScript = mainScript.replace(jsSuffixRegExp, '');
+
+                 //If mainScript is still a path, fall back to dataMain
+                if (req.jsExtRegExp.test(mainScript)) {
+                    mainScript = dataMain;
+                }
+
+                //Put the data-main script in the files to load.
+                cfg.deps = cfg.deps ? cfg.deps.concat(mainScript) : [mainScript];
+
+                return true;
+            }
+        });
+    }
+
+    /**
+     * The function that handles definitions of modules. Differs from
+     * require() in that a string for the module should be the first argument,
+     * and the function to execute after dependencies are loaded should
+     * return a value to define the module corresponding to the first argument's
+     * name.
+     */
+    define = function (name, deps, callback) {
+        var node, context;
+
+        //Allow for anonymous modules
+        if (typeof name !== 'string') {
+            //Adjust args appropriately
+            callback = deps;
+            deps = name;
+            name = null;
+        }
+
+        //This module may not have dependencies
+        if (!isArray(deps)) {
+            callback = deps;
+            deps = null;
+        }
+
+        //If no name, and callback is a function, then figure out if it a
+        //CommonJS thing with dependencies.
+        if (!deps && isFunction(callback)) {
+            deps = [];
+            //Remove comments from the callback string,
+            //look for require calls, and pull them into the dependencies,
+            //but only if there are function args.
+            if (callback.length) {
+                callback
+                    .toString()
+                    .replace(commentRegExp, '')
+                    .replace(cjsRequireRegExp, function (match, dep) {
+                        deps.push(dep);
+                    });
+
+                //May be a CommonJS thing even without require calls, but still
+                //could use exports, and module. Avoid doing exports and module
+                //work though if it just needs require.
+                //REQUIRES the function to expect the CommonJS variables in the
+                //order listed below.
+                deps = (callback.length === 1 ? ['require'] : ['require', 'exports', 'module']).concat(deps);
+            }
+        }
+
+        //If in IE 6-8 and hit an anonymous define() call, do the interactive
+        //work.
+        if (useInteractive) {
+            node = currentlyAddingScript || getInteractiveScript();
+            if (node) {
+                if (!name) {
+                    name = node.getAttribute('data-requiremodule');
+                }
+                context = contexts[node.getAttribute('data-requirecontext')];
+            }
+        }
+
+        //Always save off evaluating the def call until the script onload handler.
+        //This allows multiple modules to be in a file without prematurely
+        //tracing dependencies, and allows for anonymous module support,
+        //where the module name is not known until the script onload event
+        //occurs. If no context, use the global queue, and get it processed
+        //in the onscript load callback.
+        (context ? context.defQueue : globalDefQueue).push([name, deps, callback]);
+    };
+
+    define.amd = {
+        jQuery: true
+    };
+
+
+    /**
+     * Executes the text. Normally just uses eval, but can be modified
+     * to use a better, environment-specific call. Only used for transpiling
+     * loader plugins, not for plain JS modules.
+     * @param {String} text the text to execute/evaluate.
+     */
+    req.exec = function (text) {
+        /*jslint evil: true */
+        return eval(text);
+    };
+
+    //Set up with config info.
+    req(cfg);
+}(this));
diff --git a/devtools/client/jsonview/main.js b/devtools/client/jsonview/main.js
new file mode 100644
index 000000000..a438e2e34
--- /dev/null
+++ b/devtools/client/jsonview/main.js
@@ -0,0 +1,62 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
+/* 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/. */
+/* globals JsonViewUtils*/
+
+"use strict";
+
+const { Cu } = require("chrome");
+const Services = require("Services");
+
+const { XPCOMUtils } = Cu.import("resource://gre/modules/XPCOMUtils.jsm", {});
+
+XPCOMUtils.defineLazyGetter(this, "JsonViewUtils", function () {
+  return require("devtools/client/jsonview/utils");
+});
+
+/**
+ * Singleton object that represents the JSON View in-content tool.
+ * It has the same lifetime as the browser. Initialization done by
+ * DevTools() object from devtools/client/framework/devtools.js
+ */
+var JsonView = {
+  initialize: function () {
+    // Load JSON converter module. This converter is responsible
+    // for handling 'application/json' documents and converting
+    // them into a simple web-app that allows easy inspection
+    // of the JSON data.
+    Services.ppmm.loadProcessScript(
+      "resource://devtools/client/jsonview/converter-observer.js",
+      true);
+
+    this.onSaveListener = this.onSave.bind(this);
+
+    // Register for messages coming from the child process.
+    Services.ppmm.addMessageListener(
+      "devtools:jsonview:save", this.onSaveListener);
+  },
+
+  destroy: function () {
+    Services.ppmm.removeMessageListener(
+      "devtools:jsonview:save", this.onSaveListener);
+  },
+
+  // Message handlers for events from child processes
+
+  /**
+   * Save JSON to a file needs to be implemented here
+   * in the parent process.
+   */
+  onSave: function (message) {
+    let value = message.data;
+    let file = JsonViewUtils.getTargetFile();
+    if (file) {
+      JsonViewUtils.saveToFile(file, value);
+    }
+  }
+};
+
+// Exports from this module
+module.exports.JsonView = JsonView;
diff --git a/devtools/client/jsonview/moz.build b/devtools/client/jsonview/moz.build
new file mode 100644
index 000000000..06a98ed9b
--- /dev/null
+++ b/devtools/client/jsonview/moz.build
@@ -0,0 +1,23 @@
+# -*- 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/.
+
+DIRS += [
+    'components',
+    'css',
+    'lib'
+]
+
+DevToolsModules(
+    'converter-child.js',
+    'converter-observer.js',
+    'converter-sniffer.js',
+    'json-viewer.js',
+    'main.js',
+    'utils.js',
+    'viewer-config.js'
+)
+
+BROWSER_CHROME_MANIFESTS += ['test/browser.ini']
diff --git a/devtools/client/jsonview/test/.eslintrc.js b/devtools/client/jsonview/test/.eslintrc.js
new file mode 100644
index 000000000..8d15a76d9
--- /dev/null
+++ b/devtools/client/jsonview/test/.eslintrc.js
@@ -0,0 +1,6 @@
+"use strict";
+
+module.exports = {
+  // Extend from the shared list of defined globals for mochitests.
+  "extends": "../../../.eslintrc.mochitests.js"
+};
diff --git a/devtools/client/jsonview/test/array_json.json b/devtools/client/jsonview/test/array_json.json
new file mode 100644
index 000000000..f91c3e08d
--- /dev/null
+++ b/devtools/client/jsonview/test/array_json.json
@@ -0,0 +1 @@
+[{"name": "jan"},{"name": "honza"},{"name": "odvarko"}]
diff --git a/devtools/client/jsonview/test/array_json.json^headers^ b/devtools/client/jsonview/test/array_json.json^headers^
new file mode 100644
index 000000000..6010bfd18
--- /dev/null
+++ b/devtools/client/jsonview/test/array_json.json^headers^
@@ -0,0 +1 @@
+Content-Type: application/json; charset=utf-8
diff --git a/devtools/client/jsonview/test/browser.ini b/devtools/client/jsonview/test/browser.ini
new file mode 100644
index 000000000..14f640c8c
--- /dev/null
+++ b/devtools/client/jsonview/test/browser.ini
@@ -0,0 +1,28 @@
+[DEFAULT]
+tags = devtools
+subsuite = devtools
+support-files =
+  array_json.json
+  array_json.json^headers^
+  doc_frame_script.js
+  head.js
+  invalid_json.json
+  invalid_json.json^headers^
+  simple_json.json
+  simple_json.json^headers^
+  valid_json.json
+  valid_json.json^headers^
+  !/devtools/client/commandline/test/head.js
+  !/devtools/client/framework/test/head.js
+  !/devtools/client/framework/test/shared-head.js
+
+[browser_jsonview_copy_headers.js]
+subsuite = clipboard
+[browser_jsonview_copy_json.js]
+subsuite = clipboard
+[browser_jsonview_copy_rawdata.js]
+subsuite = clipboard
+[browser_jsonview_filter.js]
+[browser_jsonview_invalid_json.js]
+[browser_jsonview_valid_json.js]
+[browser_jsonview_save_json.js]
diff --git a/devtools/client/jsonview/test/browser_jsonview_copy_headers.js b/devtools/client/jsonview/test/browser_jsonview_copy_headers.js
new file mode 100644
index 000000000..1ffe9f8ca
--- /dev/null
+++ b/devtools/client/jsonview/test/browser_jsonview_copy_headers.js
@@ -0,0 +1,35 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const TEST_JSON_URL = URL_ROOT + "valid_json.json";
+
+add_task(function* () {
+  info("Test valid JSON started");
+
+  yield addJsonViewTab(TEST_JSON_URL);
+
+  // Select the RawData tab
+  yield selectJsonViewContentTab("headers");
+
+  // Check displayed headers
+  let count = yield getElementCount(".headersPanelBox .netHeadersGroup");
+  is(count, 2, "There must be two header groups");
+
+  let text = yield getElementText(".headersPanelBox .netInfoHeadersTable");
+  isnot(text, "", "Headers text must not be empty");
+
+  let browser = gBrowser.selectedBrowser;
+
+  // Verify JSON copy into the clipboard.
+  yield waitForClipboardPromise(function setup() {
+    BrowserTestUtils.synthesizeMouseAtCenter(
+      ".headersPanelBox .toolbar button.copy",
+      {}, browser);
+  }, function validator(value) {
+    return value.indexOf("application/json") > 0;
+  });
+});
diff --git a/devtools/client/jsonview/test/browser_jsonview_copy_json.js b/devtools/client/jsonview/test/browser_jsonview_copy_json.js
new file mode 100644
index 000000000..b4c08b843
--- /dev/null
+++ b/devtools/client/jsonview/test/browser_jsonview_copy_json.js
@@ -0,0 +1,31 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const TEST_JSON_URL = URL_ROOT + "simple_json.json";
+
+add_task(function* () {
+  info("Test copy JSON started");
+
+  yield addJsonViewTab(TEST_JSON_URL);
+
+  let countBefore = yield getElementCount(".jsonPanelBox .treeTable .treeRow");
+  ok(countBefore == 1, "There must be one row");
+
+  let text = yield getElementText(".jsonPanelBox .treeTable .treeRow");
+  is(text, "name\"value\"", "There must be proper JSON displayed");
+
+  // Verify JSON copy into the clipboard.
+  let value = "{\"name\": \"value\"}\n";
+  let browser = gBrowser.selectedBrowser;
+  let selector = ".jsonPanelBox .toolbar button.copy";
+  yield waitForClipboardPromise(function setup() {
+    BrowserTestUtils.synthesizeMouseAtCenter(selector, {}, browser);
+  }, function validator(result) {
+    let str = normalizeNewLines(result);
+    return str == value;
+  });
+});
diff --git a/devtools/client/jsonview/test/browser_jsonview_copy_rawdata.js b/devtools/client/jsonview/test/browser_jsonview_copy_rawdata.js
new file mode 100644
index 000000000..d2346ea42
--- /dev/null
+++ b/devtools/client/jsonview/test/browser_jsonview_copy_rawdata.js
@@ -0,0 +1,53 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const TEST_JSON_URL = URL_ROOT + "simple_json.json";
+
+let jsonText = "{\"name\": \"value\"}\n";
+let prettyJson = "{\n  \"name\": \"value\"\n}";
+
+add_task(function* () {
+  info("Test copy raw data started");
+
+  yield addJsonViewTab(TEST_JSON_URL);
+
+  // Select the RawData tab
+  yield selectJsonViewContentTab("rawdata");
+
+  // Check displayed JSON
+  let text = yield getElementText(".textPanelBox .data");
+  is(text, jsonText, "Proper JSON must be displayed in DOM");
+
+  let browser = gBrowser.selectedBrowser;
+
+  // Verify JSON copy into the clipboard.
+  yield waitForClipboardPromise(function setup() {
+    BrowserTestUtils.synthesizeMouseAtCenter(
+      ".textPanelBox .toolbar button.copy",
+      {}, browser);
+  }, jsonText);
+
+  // Click 'Pretty Print' button
+  yield BrowserTestUtils.synthesizeMouseAtCenter(
+    ".textPanelBox .toolbar button.prettyprint",
+    {}, browser);
+
+  let prettyText = yield getElementText(".textPanelBox .data");
+  prettyText = normalizeNewLines(prettyText);
+  ok(prettyText.startsWith(prettyJson),
+    "Pretty printed JSON must be displayed");
+
+  // Verify JSON copy into the clipboard.
+  yield waitForClipboardPromise(function setup() {
+    BrowserTestUtils.synthesizeMouseAtCenter(
+      ".textPanelBox .toolbar button.copy",
+      {}, browser);
+  }, function validator(value) {
+    let str = normalizeNewLines(value);
+    return str == prettyJson;
+  });
+});
diff --git a/devtools/client/jsonview/test/browser_jsonview_filter.js b/devtools/client/jsonview/test/browser_jsonview_filter.js
new file mode 100644
index 000000000..5e87bb8ae
--- /dev/null
+++ b/devtools/client/jsonview/test/browser_jsonview_filter.js
@@ -0,0 +1,28 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const TEST_JSON_URL = URL_ROOT + "array_json.json";
+
+add_task(function* () {
+  info("Test valid JSON started");
+
+  yield addJsonViewTab(TEST_JSON_URL);
+
+  let count = yield getElementCount(".jsonPanelBox .treeTable .treeRow");
+  is(count, 6, "There must be expected number of rows");
+
+  // XXX use proper shortcut to focus the filter box
+  // as soon as bug Bug 1178771 is fixed.
+  yield sendString("h", ".jsonPanelBox .searchBox");
+
+  // The filtering is done asynchronously so, we need to wait.
+  yield waitForFilter();
+
+  let hiddenCount = yield getElementCount(
+    ".jsonPanelBox .treeTable .treeRow.hidden");
+  is(hiddenCount, 4, "There must be expected number of hidden rows");
+});
diff --git a/devtools/client/jsonview/test/browser_jsonview_invalid_json.js b/devtools/client/jsonview/test/browser_jsonview_invalid_json.js
new file mode 100644
index 000000000..de3cbd74d
--- /dev/null
+++ b/devtools/client/jsonview/test/browser_jsonview_invalid_json.js
@@ -0,0 +1,20 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const TEST_JSON_URL = URL_ROOT + "invalid_json.json";
+
+add_task(function* () {
+  info("Test invalid JSON started");
+
+  yield addJsonViewTab(TEST_JSON_URL);
+
+  let count = yield getElementCount(".jsonPanelBox .treeTable .treeRow");
+  ok(count == 0, "There must be no row");
+
+  let text = yield getElementText(".jsonPanelBox .jsonParseError");
+  ok(text, "There must be an error description");
+});
diff --git a/devtools/client/jsonview/test/browser_jsonview_save_json.js b/devtools/client/jsonview/test/browser_jsonview_save_json.js
new file mode 100644
index 000000000..4b95c563f
--- /dev/null
+++ b/devtools/client/jsonview/test/browser_jsonview_save_json.js
@@ -0,0 +1,38 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const TEST_JSON_URL = URL_ROOT + "valid_json.json";
+
+let { MockFilePicker } = SpecialPowers;
+
+MockFilePicker.init(window);
+MockFilePicker.returnValue = MockFilePicker.returnCancel;
+
+registerCleanupFunction(function () {
+  MockFilePicker.cleanup();
+});
+
+add_task(function* () {
+  info("Test save JSON started");
+
+  yield addJsonViewTab(TEST_JSON_URL);
+
+  let promise = new Promise((resolve) => {
+    MockFilePicker.showCallback = () => {
+      MockFilePicker.showCallback = null;
+      ok(true, "File picker was opened");
+      resolve();
+    };
+  });
+
+  let browser = gBrowser.selectedBrowser;
+  yield BrowserTestUtils.synthesizeMouseAtCenter(
+    ".jsonPanelBox button.save",
+    {}, browser);
+
+  yield promise;
+});
diff --git a/devtools/client/jsonview/test/browser_jsonview_valid_json.js b/devtools/client/jsonview/test/browser_jsonview_valid_json.js
new file mode 100644
index 000000000..83d0e1088
--- /dev/null
+++ b/devtools/client/jsonview/test/browser_jsonview_valid_json.js
@@ -0,0 +1,33 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const TEST_JSON_URL = URL_ROOT + "valid_json.json";
+
+add_task(function* () {
+  info("Test valid JSON started");
+
+  let tab = yield addJsonViewTab(TEST_JSON_URL);
+
+  ok(tab.linkedBrowser.contentPrincipal.isNullPrincipal, "Should have null principal");
+
+  let countBefore = yield getElementCount(".jsonPanelBox .treeTable .treeRow");
+  ok(countBefore == 3, "There must be three rows");
+
+  let objectCellCount = yield getElementCount(
+    ".jsonPanelBox .treeTable .objectCell");
+  ok(objectCellCount == 1, "There must be one object cell");
+
+  let objectCellText = yield getElementText(
+    ".jsonPanelBox .treeTable .objectCell");
+  ok(objectCellText == "", "The summary is hidden when object is expanded");
+
+  // Collapsed auto-expanded node.
+  yield clickJsonNode(".jsonPanelBox .treeTable .treeLabel");
+
+  let countAfter = yield getElementCount(".jsonPanelBox .treeTable .treeRow");
+  ok(countAfter == 1, "There must be one row");
+});
diff --git a/devtools/client/jsonview/test/doc_frame_script.js b/devtools/client/jsonview/test/doc_frame_script.js
new file mode 100644
index 000000000..3d19b3433
--- /dev/null
+++ b/devtools/client/jsonview/test/doc_frame_script.js
@@ -0,0 +1,98 @@
+/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+ http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+/* globals Services, sendAsyncMessage, addMessageListener */
+
+// XXX Some helper API could go to:
+// testing/mochitest/tests/SimpleTest/AsyncContentUtils.js
+// (or at least to share test API in devtools)
+
+// Set up a dummy environment so that EventUtils works. We need to be careful to
+// pass a window object into each EventUtils method we call rather than having
+// it rely on the |window| global.
+let EventUtils = {};
+EventUtils.window = content;
+EventUtils.parent = EventUtils.window;
+EventUtils._EU_Ci = Components.interfaces; // eslint-disable-line
+EventUtils._EU_Cc = Components.classes; // eslint-disable-line
+EventUtils.navigator = content.navigator;
+EventUtils.KeyboardEvent = content.KeyboardEvent;
+
+Services.scriptloader.loadSubScript(
+  "chrome://mochikit/content/tests/SimpleTest/EventUtils.js", EventUtils);
+
+/**
+ * When the JSON View is done rendering it triggers custom event
+ * "JSONViewInitialized", then the Test:TestPageProcessingDone message
+ * will be sent to the parent process for tests to wait for this event
+ * if needed.
+ */
+content.addEventListener("JSONViewInitialized", () => {
+  sendAsyncMessage("Test:JsonView:JSONViewInitialized");
+}, false);
+
+addMessageListener("Test:JsonView:GetElementCount", function (msg) {
+  let {selector} = msg.data;
+  let nodeList = content.document.querySelectorAll(selector);
+  sendAsyncMessage(msg.name, {count: nodeList.length});
+});
+
+addMessageListener("Test:JsonView:GetElementText", function (msg) {
+  let {selector} = msg.data;
+  let element = content.document.querySelector(selector);
+  let text = element ? element.textContent : null;
+  sendAsyncMessage(msg.name, {text: text});
+});
+
+addMessageListener("Test:JsonView:FocusElement", function (msg) {
+  let {selector} = msg.data;
+  let element = content.document.querySelector(selector);
+  if (element) {
+    element.focus();
+  }
+  sendAsyncMessage(msg.name);
+});
+
+addMessageListener("Test:JsonView:SendString", function (msg) {
+  let {selector, str} = msg.data;
+  if (selector) {
+    let element = content.document.querySelector(selector);
+    if (element) {
+      element.focus();
+    }
+  }
+
+  EventUtils.sendString(str, content);
+
+  sendAsyncMessage(msg.name);
+});
+
+addMessageListener("Test:JsonView:WaitForFilter", function (msg) {
+  let firstRow = content.document.querySelector(
+    ".jsonPanelBox .treeTable .treeRow");
+
+  // Check if the filter is already set.
+  if (firstRow.classList.contains("hidden")) {
+    sendAsyncMessage(msg.name);
+    return;
+  }
+
+  // Wait till the first row has 'hidden' class set.
+  let observer = new content.MutationObserver(function (mutations) {
+    for (let i = 0; i < mutations.length; i++) {
+      let mutation = mutations[i];
+      if (mutation.attributeName == "class") {
+        if (firstRow.classList.contains("hidden")) {
+          observer.disconnect();
+          sendAsyncMessage(msg.name);
+          break;
+        }
+      }
+    }
+  });
+
+  observer.observe(firstRow, { attributes: true });
+});
diff --git a/devtools/client/jsonview/test/head.js b/devtools/client/jsonview/test/head.js
new file mode 100644
index 000000000..b71883e67
--- /dev/null
+++ b/devtools/client/jsonview/test/head.js
@@ -0,0 +1,145 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+/* eslint no-unused-vars: [2, {"vars": "local", "args": "none"}] */
+/* import-globals-from ../../framework/test/shared-head.js */
+/* import-globals-from ../../framework/test/head.js */
+
+"use strict";
+
+// shared-head.js handles imports, constants, and utility functions
+Services.scriptloader.loadSubScript(
+  "chrome://mochitests/content/browser/devtools/client/framework/test/head.js", this);
+
+const JSON_VIEW_PREF = "devtools.jsonview.enabled";
+
+// Enable JSON View for the test
+Services.prefs.setBoolPref(JSON_VIEW_PREF, true);
+
+registerCleanupFunction(() => {
+  Services.prefs.clearUserPref(JSON_VIEW_PREF);
+});
+
+// XXX move some API into devtools/framework/test/shared-head.js
+
+/**
+ * Add a new test tab in the browser and load the given url.
+ * @param {String} url The url to be loaded in the new tab
+ * @return a promise that resolves to the tab object when the url is loaded
+ */
+function addJsonViewTab(url) {
+  info("Adding a new JSON tab with URL: '" + url + "'");
+
+  let deferred = promise.defer();
+  addTab(url).then(tab => {
+    let browser = tab.linkedBrowser;
+
+    // Load devtools/shared/frame-script-utils.js
+    getFrameScript();
+
+    // Load frame script with helpers for JSON View tests.
+    let rootDir = getRootDirectory(gTestPath);
+    let frameScriptUrl = rootDir + "doc_frame_script.js";
+    browser.messageManager.loadFrameScript(frameScriptUrl, false);
+
+    // Resolve if the JSONView is fully loaded or wait
+    // for an initialization event.
+    if (content.window.wrappedJSObject.jsonViewInitialized) {
+      deferred.resolve(tab);
+    } else {
+      waitForContentMessage("Test:JsonView:JSONViewInitialized").then(() => {
+        deferred.resolve(tab);
+      });
+    }
+  });
+
+  return deferred.promise;
+}
+
+/**
+ * Expanding a node in the JSON tree
+ */
+function clickJsonNode(selector) {
+  info("Expanding node: '" + selector + "'");
+
+  let browser = gBrowser.selectedBrowser;
+  return BrowserTestUtils.synthesizeMouseAtCenter(selector, {}, browser);
+}
+
+/**
+ * Select JSON View tab (in the content).
+ */
+function selectJsonViewContentTab(name) {
+  info("Selecting tab: '" + name + "'");
+
+  let browser = gBrowser.selectedBrowser;
+  let selector = ".tabs-menu .tabs-menu-item." + name + " a";
+  return BrowserTestUtils.synthesizeMouseAtCenter(selector, {}, browser);
+}
+
+function getElementCount(selector) {
+  info("Get element count: '" + selector + "'");
+
+  let data = {
+    selector: selector
+  };
+
+  return executeInContent("Test:JsonView:GetElementCount", data)
+  .then(result => {
+    return result.count;
+  });
+}
+
+function getElementText(selector) {
+  info("Get element text: '" + selector + "'");
+
+  let data = {
+    selector: selector
+  };
+
+  return executeInContent("Test:JsonView:GetElementText", data)
+  .then(result => {
+    return result.text;
+  });
+}
+
+function focusElement(selector) {
+  info("Focus element: '" + selector + "'");
+
+  let data = {
+    selector: selector
+  };
+
+  return executeInContent("Test:JsonView:FocusElement", data);
+}
+
+/**
+ * Send the string aStr to the focused element.
+ *
+ * For now this method only works for ASCII characters and emulates the shift
+ * key state on US keyboard layout.
+ */
+function sendString(str, selector) {
+  info("Send string: '" + str + "'");
+
+  let data = {
+    selector: selector,
+    str: str
+  };
+
+  return executeInContent("Test:JsonView:SendString", data);
+}
+
+function waitForTime(delay) {
+  let deferred = promise.defer();
+  setTimeout(deferred.resolve, delay);
+  return deferred.promise;
+}
+
+function waitForFilter() {
+  return executeInContent("Test:JsonView:WaitForFilter");
+}
+
+function normalizeNewLines(value) {
+  return value.replace("(\r\n|\n)", "\n");
+}
diff --git a/devtools/client/jsonview/test/invalid_json.json b/devtools/client/jsonview/test/invalid_json.json
new file mode 100644
index 000000000..004e1e203
--- /dev/null
+++ b/devtools/client/jsonview/test/invalid_json.json
@@ -0,0 +1 @@
+{,}
diff --git a/devtools/client/jsonview/test/invalid_json.json^headers^ b/devtools/client/jsonview/test/invalid_json.json^headers^
new file mode 100644
index 000000000..6010bfd18
--- /dev/null
+++ b/devtools/client/jsonview/test/invalid_json.json^headers^
@@ -0,0 +1 @@
+Content-Type: application/json; charset=utf-8
diff --git a/devtools/client/jsonview/test/simple_json.json b/devtools/client/jsonview/test/simple_json.json
new file mode 100644
index 000000000..831dfbcfb
--- /dev/null
+++ b/devtools/client/jsonview/test/simple_json.json
@@ -0,0 +1 @@
+{"name": "value"}
diff --git a/devtools/client/jsonview/test/simple_json.json^headers^ b/devtools/client/jsonview/test/simple_json.json^headers^
new file mode 100644
index 000000000..6010bfd18
--- /dev/null
+++ b/devtools/client/jsonview/test/simple_json.json^headers^
@@ -0,0 +1 @@
+Content-Type: application/json; charset=utf-8
diff --git a/devtools/client/jsonview/test/valid_json.json b/devtools/client/jsonview/test/valid_json.json
new file mode 100644
index 000000000..ca7356ccd
--- /dev/null
+++ b/devtools/client/jsonview/test/valid_json.json
@@ -0,0 +1,6 @@
+{
+  "family": {
+    "father": "John Doe",
+    "mother": "Alice Doe"
+  }
+}
diff --git a/devtools/client/jsonview/test/valid_json.json^headers^ b/devtools/client/jsonview/test/valid_json.json^headers^
new file mode 100644
index 000000000..6010bfd18
--- /dev/null
+++ b/devtools/client/jsonview/test/valid_json.json^headers^
@@ -0,0 +1 @@
+Content-Type: application/json; charset=utf-8
diff --git a/devtools/client/jsonview/utils.js b/devtools/client/jsonview/utils.js
new file mode 100644
index 000000000..a70afdc68
--- /dev/null
+++ b/devtools/client/jsonview/utils.js
@@ -0,0 +1,101 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
+/* 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";
+
+const { Cu, Cc, Ci } = require("chrome");
+const Services = require("Services");
+const { getMostRecentBrowserWindow } = require("sdk/window/utils");
+
+const OPEN_FLAGS = {
+  RDONLY: parseInt("0x01", 16),
+  WRONLY: parseInt("0x02", 16),
+  CREATE_FILE: parseInt("0x08", 16),
+  APPEND: parseInt("0x10", 16),
+  TRUNCATE: parseInt("0x20", 16),
+  EXCL: parseInt("0x80", 16)
+};
+
+/**
+ * Open File Save As dialog and let the user to pick proper file location.
+ */
+exports.getTargetFile = function () {
+  let fp = Cc["@mozilla.org/filepicker;1"].createInstance(Ci.nsIFilePicker);
+
+  let win = getMostRecentBrowserWindow();
+  fp.init(win, null, Ci.nsIFilePicker.modeSave);
+  fp.appendFilter("JSON Files", "*.json; *.jsonp;");
+  fp.appendFilters(Ci.nsIFilePicker.filterText);
+  fp.appendFilters(Ci.nsIFilePicker.filterAll);
+  fp.filterIndex = 0;
+
+  let rv = fp.show();
+  if (rv == Ci.nsIFilePicker.returnOK || rv == Ci.nsIFilePicker.returnReplace) {
+    return fp.file;
+  }
+
+  return null;
+};
+
+/**
+ * Save JSON to a file
+ */
+exports.saveToFile = function (file, jsonString) {
+  let foStream = Cc["@mozilla.org/network/file-output-stream;1"]
+    .createInstance(Ci.nsIFileOutputStream);
+
+  // write, create, truncate
+  let openFlags = OPEN_FLAGS.WRONLY | OPEN_FLAGS.CREATE_FILE |
+    OPEN_FLAGS.TRUNCATE;
+
+  let permFlags = parseInt("0666", 8);
+  foStream.init(file, openFlags, permFlags, 0);
+
+  let converter = Cc["@mozilla.org/intl/converter-output-stream;1"]
+    .createInstance(Ci.nsIConverterOutputStream);
+
+  converter.init(foStream, "UTF-8", 0, 0);
+
+  // The entire jsonString can be huge so, write the data in chunks.
+  let chunkLength = 1024 * 1204;
+  for (let i = 0; i <= jsonString.length; i++) {
+    let data = jsonString.substr(i, chunkLength + 1);
+    if (data) {
+      converter.writeString(data);
+    }
+    i = i + chunkLength;
+  }
+
+  // this closes foStream
+  converter.close();
+};
+
+/**
+ * Get the current theme from preferences.
+ */
+exports.getCurrentTheme = function () {
+  return Services.prefs.getCharPref("devtools.theme");
+};
+
+/**
+ * Export given object into the target window scope.
+ */
+exports.exportIntoContentScope = function (win, obj, defineAs) {
+  let clone = Cu.createObjectIn(win, {
+    defineAs: defineAs
+  });
+
+  let props = Object.getOwnPropertyNames(obj);
+  for (let i = 0; i < props.length; i++) {
+    let propName = props[i];
+    let propValue = obj[propName];
+    if (typeof propValue == "function") {
+      Cu.exportFunction(propValue, clone, {
+        defineAs: propName
+      });
+    }
+  }
+};
diff --git a/devtools/client/jsonview/viewer-config.js b/devtools/client/jsonview/viewer-config.js
new file mode 100644
index 000000000..b5ffbe34d
--- /dev/null
+++ b/devtools/client/jsonview/viewer-config.js
@@ -0,0 +1,39 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
+/* 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/. */
+/* global requirejs */
+
+"use strict";
+
+/**
+ * RequireJS configuration for JSON Viewer.
+ *
+ * ReactJS library is shared among DevTools. Both, the minified (production)
+ * version and developer versions of the library are available.
+ *
+ * In order to use the developer version you need to specify the following
+ * in your .mozconfig (see also bug 1181646):
+ * ac_add_options --enable-debug-js-modules
+ *
+ * The path mapping uses paths fallback (a feature supported by RequireJS)
+ * See also: http://requirejs.org/docs/api.html#pathsfallbacks
+ *
+ * React module ID is using exactly the same (relative) path as the rest
+ * of the code base, so it's consistent and modules can be easily reused.
+ */
+require.config({
+  baseUrl: ".",
+  paths: {
+    "devtools/client/shared": "resource://devtools/client/shared",
+    "devtools/shared": "resource://devtools/shared",
+    "devtools/client/shared/vendor/react": [
+      "resource://devtools/client/shared/vendor/react-dev",
+      "resource://devtools/client/shared/vendor/react"
+    ],
+  }
+});
+
+// Load the main panel module
+requirejs(["json-viewer"]);