--- a/devtools/client/netmonitor/src/components/App.js
+++ b/devtools/client/netmonitor/src/components/App.js
@@ -5,18 +5,22 @@
 "use strict";
 
 const { createFactory } = require("devtools/client/shared/vendor/react");
 const PropTypes = require("devtools/client/shared/vendor/react-prop-types");
 const dom = require("devtools/client/shared/vendor/react-dom-factories");
 const { connect } = require("devtools/client/shared/vendor/react-redux");
 
 // Components
-const MonitorPanel = createFactory(require("./MonitorPanel"));
-const StatisticsPanel = createFactory(require("./StatisticsPanel"));
+loader.lazyGetter(this, "MonitorPanel", function () {
+  return createFactory(require("./MonitorPanel"));
+});
+loader.lazyGetter(this, "StatisticsPanel", function () {
+  return createFactory(require("./StatisticsPanel"));
+});
 
 const { div } = dom;
 
 /**
  * App component
  * The top level component for representing main panel
  */
 function App({

--- a/devtools/client/netmonitor/src/components/HeadersPanel.js
+++ b/devtools/client/netmonitor/src/components/HeadersPanel.js
@@ -18,21 +18,29 @@ const {
 } = require("../utils/mdn-utils");
 const {
   fetchNetworkUpdatePacket,
   writeHeaderText,
 } = require("../utils/request-utils");
 const { sortObjectKeys } = require("../utils/sort-utils");
 
 // Components
-const { REPS, MODE } = require("devtools/client/shared/components/reps/reps");
-const MDNLink = createFactory(require("./MdnLink"));
 const PropertiesView = createFactory(require("./PropertiesView"));
 
-const { Rep } = REPS;
+loader.lazyGetter(this, "MDNLink", function () {
+  return createFactory(require("./MdnLink"));
+});
+
+loader.lazyGetter(this, "Rep", function () {
+  return require("devtools/client/shared/components/reps/reps").REPS.Rep;
+});
+loader.lazyGetter(this, "MODE", function () {
+  return require("devtools/client/shared/components/reps/reps").MODE;
+});
+
 const { button, div, input, textarea, span } = dom;
 
 const EDIT_AND_RESEND = L10N.getStr("netmonitor.summary.editAndResend");
 const RAW_HEADERS = L10N.getStr("netmonitor.summary.rawHeaders");
 const RAW_HEADERS_REQUEST = L10N.getStr("netmonitor.summary.rawHeaders.requestHeaders");
 const RAW_HEADERS_RESPONSE = L10N.getStr("netmonitor.summary.rawHeaders.responseHeaders");
 const HEADERS_EMPTY_TEXT = L10N.getStr("headersEmptyText");
 const HEADERS_FILTER_TEXT = L10N.getStr("headersFilterText");

--- a/devtools/client/netmonitor/src/components/MonitorPanel.js
+++ b/devtools/client/netmonitor/src/components/MonitorPanel.js
@@ -2,29 +2,33 @@
  * 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 Services = require("Services");
 const { Component, createFactory } = require("devtools/client/shared/vendor/react");
 const dom = require("devtools/client/shared/vendor/react-dom-factories");
+const { div } = dom;
 const PropTypes = require("devtools/client/shared/vendor/react-prop-types");
 const { connect } = require("devtools/client/shared/vendor/react-redux");
 const { findDOMNode } = require("devtools/client/shared/vendor/react-dom");
 const Actions = require("../actions/index");
 const { updateFormDataSections } = require("../utils/request-utils");
 const { getSelectedRequest } = require("../selectors/index");
 
 // Components
 const SplitBox = createFactory(require("devtools/client/shared/components/splitter/SplitBox"));
-const NetworkDetailsPanel = createFactory(require("./NetworkDetailsPanel"));
 const RequestList = createFactory(require("./RequestList"));
 const Toolbar = createFactory(require("./Toolbar"));
-const { div } = dom;
+
+loader.lazyGetter(this, "NetworkDetailsPanel", function () {
+  return createFactory(require("./NetworkDetailsPanel"));
+});
+
 const MediaQueryList = window.matchMedia("(min-width: 700px)");
 
 /**
  * Monitor panel component
  * The main panel for displaying various network request information
  */
 class MonitorPanel extends Component {
   static get propTypes() {

--- a/devtools/client/netmonitor/src/components/NetworkDetailsPanel.js
+++ b/devtools/client/netmonitor/src/components/NetworkDetailsPanel.js
@@ -7,18 +7,22 @@
 const { createFactory } = require("devtools/client/shared/vendor/react");
 const PropTypes = require("devtools/client/shared/vendor/react-prop-types");
 const dom = require("devtools/client/shared/vendor/react-dom-factories");
 const { connect } = require("devtools/client/shared/vendor/react-redux");
 const Actions = require("../actions/index");
 const { getSelectedRequest } = require("../selectors/index");
 
 // Components
-const CustomRequestPanel = createFactory(require("./CustomRequestPanel"));
-const TabboxPanel = createFactory(require("./TabboxPanel"));
+loader.lazyGetter(this, "CustomRequestPanel", function () {
+  return createFactory(require("./CustomRequestPanel"));
+});
+loader.lazyGetter(this, "TabboxPanel", function () {
+  return createFactory(require("./TabboxPanel"));
+});
 
 const { div } = dom;
 
 /**
  * Network details panel component
  */
 function NetworkDetailsPanel({
   connector,

--- a/devtools/client/netmonitor/src/components/PropertiesView.js
+++ b/devtools/client/netmonitor/src/components/PropertiesView.js
@@ -5,28 +5,42 @@
 /* eslint-disable react/prop-types */
 
 "use strict";
 
 const { Component, createFactory } = require("devtools/client/shared/vendor/react");
 const dom = require("devtools/client/shared/vendor/react-dom-factories");
 const PropTypes = require("devtools/client/shared/vendor/react-prop-types");
 
-const { REPS, MODE } = require("devtools/client/shared/components/reps/reps");
-const { Rep } = REPS;
-
 const { FILTER_SEARCH_DELAY } = require("../constants");
 
 // Components
-const SearchBox = createFactory(require("devtools/client/shared/components/SearchBox"));
 const TreeViewClass = require("devtools/client/shared/components/tree/TreeView");
 const TreeView = createFactory(TreeViewClass);
-const TreeRow = createFactory(require("devtools/client/shared/components/tree/TreeRow"));
-const SourceEditor = createFactory(require("./SourceEditor"));
-const HTMLPreview = createFactory(require("./HtmlPreview"));
+const SearchBox = createFactory(require("devtools/client/shared/components/SearchBox"));
+
+loader.lazyGetter(this, "SearchBox", function () {
+  return createFactory(require("devtools/client/shared/components/SearchBox"));
+});
+loader.lazyGetter(this, "TreeRow", function () {
+  return createFactory(require("devtools/client/shared/components/tree/TreeRow"));
+});
+loader.lazyGetter(this, "SourceEditor", function () {
+  return createFactory(require("./SourceEditor"));
+});
+loader.lazyGetter(this, "HTMLPreview", function () {
+  return createFactory(require("./HtmlPreview"));
+});
+
+loader.lazyGetter(this, "Rep", function () {
+  return require("devtools/client/shared/components/reps/reps").REPS.Rep;
+});
+loader.lazyGetter(this, "MODE", function () {
+  return require("devtools/client/shared/components/reps/reps").MODE;
+});
 
 const { div, tr, td } = dom;
 const AUTO_EXPAND_MAX_LEVEL = 7;
 const AUTO_EXPAND_MAX_NODES = 50;
 const EDITOR_CONFIG_ID = "EDITOR_CONFIG";
 const HTML_PREVIEW_ID = "HTML_PREVIEW";
 
 /*

--- a/devtools/client/netmonitor/src/components/RequestList.js
+++ b/devtools/client/netmonitor/src/components/RequestList.js
@@ -1,24 +1,28 @@
 /* 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 { createFactory } = require("devtools/client/shared/vendor/react");
 const dom = require("devtools/client/shared/vendor/react-dom-factories");
+const { div } = dom;
 const PropTypes = require("devtools/client/shared/vendor/react-prop-types");
 
 // Components
-const RequestListContent = createFactory(require("./RequestListContent"));
-const RequestListEmptyNotice = createFactory(require("./RequestListEmptyNotice"));
 const StatusBar = createFactory(require("./StatusBar"));
 
-const { div } = dom;
+loader.lazyGetter(this, "RequestListContent", function () {
+  return createFactory(require("./RequestListContent"));
+});
+loader.lazyGetter(this, "RequestListEmptyNotice", function () {
+  return createFactory(require("./RequestListEmptyNotice"));
+});
 
 /**
  * Request panel component
  */
 function RequestList({
   connector,
   isEmpty,
 }) {

rename from devtools/client/netmonitor/src/components/RequestListColumnRemoteIp.js
rename to devtools/client/netmonitor/src/components/RequestListColumnRemoteIP.js

--- a/devtools/client/netmonitor/src/components/RequestListContent.js
+++ b/devtools/client/netmonitor/src/components/RequestListContent.js
@@ -4,29 +4,35 @@
 
 "use strict";
 
 const { Component, createFactory } = require("devtools/client/shared/vendor/react");
 const dom = require("devtools/client/shared/vendor/react-dom-factories");
 const PropTypes = require("devtools/client/shared/vendor/react-prop-types");
 const { connect } = require("devtools/client/shared/vendor/react-redux");
 const { HTMLTooltip } = require("devtools/client/shared/widgets/tooltip/HTMLTooltip");
-const {
-  setImageTooltip,
-  getImageDimensions,
-} = require("devtools/client/shared/widgets/tooltip/ImageTooltipHelper");
+
 const Actions = require("../actions/index");
 const { formDataURI } = require("../utils/request-utils");
 const {
   getDisplayedRequests,
   getSelectedRequest,
   getSortedRequests,
   getWaterfallScale,
 } = require("../selectors/index");
 
+loader.lazyGetter(this, "setImageTooltip", function () {
+  return require("devtools/client/shared/widgets/tooltip/ImageTooltipHelper")
+    .setImageTooltip;
+});
+loader.lazyGetter(this, "getImageDimensions", function () {
+  return require("devtools/client/shared/widgets/tooltip/ImageTooltipHelper")
+    .getImageDimensions;
+});
+
 // Components
 const RequestListHeader = createFactory(require("./RequestListHeader"));
 const RequestListItem = createFactory(require("./RequestListItem"));
 const RequestListContextMenu = require("../widgets/RequestListContextMenu");
 
 const { div } = dom;
 
 // Tooltip show / hide delay in ms

--- a/devtools/client/netmonitor/src/components/RequestListItem.js
+++ b/devtools/client/netmonitor/src/components/RequestListItem.js
@@ -1,46 +1,75 @@
 /* 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 { Component, createFactory } = require("devtools/client/shared/vendor/react");
 const dom = require("devtools/client/shared/vendor/react-dom-factories");
+const { div } = dom;
 const PropTypes = require("devtools/client/shared/vendor/react-prop-types");
 const {
   fetchNetworkUpdatePacket,
   propertiesEqual,
 } = require("../utils/request-utils");
 const { RESPONSE_HEADERS } = require("../constants");
 
 // Components
-const RequestListColumnCause = createFactory(require("./RequestListColumnCause"));
-const RequestListColumnContentSize = createFactory(require("./RequestListColumnContentSize"));
-const RequestListColumnCookies = createFactory(require("./RequestListColumnCookies"));
-const RequestListColumnDomain = createFactory(require("./RequestListColumnDomain"));
-const RequestListColumnDuration = createFactory(require("./RequestListColumnDuration"));
-const RequestListColumnEndTime = createFactory(require("./RequestListColumnEndTime"));
-const RequestListColumnFile = createFactory(require("./RequestListColumnFile"));
-const RequestListColumnLatency = createFactory(require("./RequestListColumnLatency"));
-const RequestListColumnMethod = createFactory(require("./RequestListColumnMethod"));
-const RequestListColumnProtocol = createFactory(require("./RequestListColumnProtocol"));
-const RequestListColumnRemoteIP = createFactory(require("./RequestListColumnRemoteIp"));
-const RequestListColumnResponseHeader = createFactory(require("./RequestListColumnResponseHeader"));
-const RequestListColumnResponseTime = createFactory(require("./RequestListColumnResponseTime"));
-const RequestListColumnScheme = createFactory(require("./RequestListColumnScheme"));
-const RequestListColumnSetCookies = createFactory(require("./RequestListColumnSetCookies"));
-const RequestListColumnStartTime = createFactory(require("./RequestListColumnStartTime"));
-const RequestListColumnStatus = createFactory(require("./RequestListColumnStatus"));
-const RequestListColumnTransferredSize = createFactory(require("./RequestListColumnTransferredSize"));
-const RequestListColumnType = createFactory(require("./RequestListColumnType"));
-const RequestListColumnWaterfall = createFactory(require("./RequestListColumnWaterfall"));
+/* global
+  RequestListColumnCause,
+  RequestListColumnContentSize,
+  RequestListColumnCookies,
+  RequestListColumnDomain,
+  RequestListColumnDuration,
+  RequestListColumnEndTime,
+  RequestListColumnFile,
+  RequestListColumnLatency,
+  RequestListColumnMethod,
+  RequestListColumnProtocol,
+  RequestListColumnRemoteIP,
+  RequestListColumnResponseHeader,
+  RequestListColumnResponseTime,
+  RequestListColumnScheme,
+  RequestListColumnSetCookies,
+  RequestListColumnStartTime,
+  RequestListColumnStatus,
+  RequestListColumnTransferredSize,
+  RequestListColumnType,
+  RequestListColumnWaterfall
+*/
 
-const { div } = dom;
+const COLUMNS = [
+  "Cause",
+  "ContentSize",
+  "Cookies",
+  "Domain",
+  "Duration",
+  "EndTime",
+  "File",
+  "Latency",
+  "Method",
+  "Protocol",
+  "RemoteIP",
+  "ResponseHeader",
+  "ResponseTime",
+  "Scheme",
+  "SetCookies",
+  "StartTime",
+  "Status",
+  "TransferredSize",
+  "Type",
+  "Waterfall"
+];
+for (let name of COLUMNS) {
+  loader.lazyGetter(this, "RequestListColumn" + name, function () {
+    return createFactory(require("./RequestListColumn" + name));
+  });
+}
 
 /**
  * Used by shouldComponentUpdate: compare two items, and compare only properties
  * relevant for rendering the RequestListItem. Other properties (like request and
  * response headers, cookies, bodies) are ignored. These are very useful for the
  * network details, but not here.
  */
 const UPDATED_REQ_ITEM_PROPS = [

--- a/devtools/client/netmonitor/src/components/moz.build
+++ b/devtools/client/netmonitor/src/components/moz.build
@@ -19,17 +19,17 @@ DevToolsModules(
     'RequestListColumnCookies.js',
     'RequestListColumnDomain.js',
     'RequestListColumnDuration.js',
     'RequestListColumnEndTime.js',
     'RequestListColumnFile.js',
     'RequestListColumnLatency.js',
     'RequestListColumnMethod.js',
     'RequestListColumnProtocol.js',
-    'RequestListColumnRemoteIp.js',
+    'RequestListColumnRemoteIP.js',
     'RequestListColumnResponseHeader.js',
     'RequestListColumnResponseTime.js',
     'RequestListColumnScheme.js',
     'RequestListColumnSetCookies.js',
     'RequestListColumnStartTime.js',
     'RequestListColumnStatus.js',
     'RequestListColumnTransferredSize.js',
     'RequestListColumnType.js',

--- a/devtools/client/netmonitor/src/widgets/RequestListContextMenu.js
+++ b/devtools/client/netmonitor/src/widgets/RequestListContextMenu.js
@@ -1,30 +1,31 @@
 /* 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 Services = require("Services");
-const { Curl } = require("devtools/client/shared/curl");
 const { gDevTools } = require("devtools/client/framework/devtools");
-const { saveAs } = require("devtools/client/shared/file-saver");
-const { copyString } = require("devtools/shared/platform/clipboard");
-const { showMenu } = require("devtools/client/netmonitor/src/utils/menu");
-const { openRequestInTab } = require("devtools/client/netmonitor/src/utils/firefox/open-request-in-tab");
-const { HarExporter } = require("../har/har-exporter");
 const { L10N } = require("../utils/l10n");
 const {
   formDataURI,
   getUrlQuery,
   getUrlBaseName,
   parseQueryString,
 } = require("../utils/request-utils");
 
+loader.lazyRequireGetter(this, "Curl", "devtools/client/shared/curl", true);
+loader.lazyRequireGetter(this, "saveAs", "devtools/client/shared/file-saver", true);
+loader.lazyRequireGetter(this, "copyString", "devtools/shared/platform/clipboard", true);
+loader.lazyRequireGetter(this, "showMenu", "devtools/client/netmonitor/src/utils/menu", true);
+loader.lazyRequireGetter(this, "openRequestInTab", "devtools/client/netmonitor/src/utils/firefox/open-request-in-tab", true);
+loader.lazyRequireGetter(this, "HarExporter", "devtools/client/netmonitor/src/har/har-exporter", true);
+
 class RequestListContextMenu {
   constructor(props) {
     this.props = props;
   }
 
   open(event, selectedRequest, sortedRequests) {
     let {
       id,