diff --git a/application/palemoon/base/content/browser-appmenu.inc b/application/palemoon/base/content/browser-appmenu.inc
index 835bf22bcf..4869afa113 100644
--- a/application/palemoon/base/content/browser-appmenu.inc
+++ b/application/palemoon/base/content/browser-appmenu.inc
@@ -132,38 +132,8 @@
       </splitmenu>
       <menuseparator class="appmenu-menuseparator"/>
       <splitmenu id="appmenu_webDeveloper"
-                 command="Tools:DevToolbox"
                  label="&appMenuWebDeveloper.label;">
         <menupopup id="appmenu_webDeveloper_popup">
-#ifdef MOZ_DEVTOOLS
-          <menuitem id="appmenu_devToolbox"
-                    observes="devtoolsMenuBroadcaster_DevToolbox"/>
-          <menuseparator id="appmenu_devtools_separator"/>
-          <menuitem id="appmenu_devToolbar"
-                    observes="devtoolsMenuBroadcaster_DevToolbar"/>
-          <menuitem id="appmenu_chromeDebugger"
-                    observes="devtoolsMenuBroadcaster_ChromeDebugger"/>
-          <menuitem id="appmenu_browserConsole"
-                    observes="devtoolsMenuBroadcaster_BrowserConsole"/>
-          <menuitem id="appmenu_responsiveUI"
-                    observes="devtoolsMenuBroadcaster_ResponsiveUI"/>
-          <menuitem id="appmenu_eyedropper"
-                    observes="devtoolsMenuBroadcaster_Eyedropper"/>
-          <menuitem id="appmenu_scratchpad"
-                    observes="devtoolsMenuBroadcaster_Scratchpad"/>
-#endif
-          <menuitem id="appmenu_pageSource"
-                    observes="devtoolsMenuBroadcaster_PageSource"/>
-          <menuitem id="appmenu_errorConsole"
-                    observes="devtoolsMenuBroadcaster_ErrorConsole"/>
-#ifdef MOZ_DEVTOOLS
-          <menuitem id="appmenu_devtools_connect"
-                    observes="devtoolsMenuBroadcaster_connect"/>
-#endif
-          <menuseparator id="appmenu_devToolsEndSeparator"/>
-          <menuitem id="appmenu_getMoreDevtools"
-                    observes="devtoolsMenuBroadcaster_GetMoreTools"/>
-          <menuseparator/>
 #define ID_PREFIX appmenu_developer_
 #define OMIT_ACCESSKEYS
 #include browser-charsetmenu.inc
@@ -173,6 +143,11 @@
                     type="checkbox"
                     observes="workOfflineMenuitemState"
                     oncommand="BrowserOffline.toggleOfflineStatus();"/>
+          <menuseparator/>
+          <menuitem id="appmenu_javascriptConsole"
+                    observes="devtoolsMenuBroadcaster_ErrorConsole"/>
+          <menuitem id="appmenu_pageSource"
+                    observes="devtoolsMenuBroadcaster_PageSource"/>
         </menupopup>
       </splitmenu>
       <menuseparator class="appmenu-menuseparator"/>
diff --git a/application/palemoon/base/content/browser-menubar.inc b/application/palemoon/base/content/browser-menubar.inc
index fa9d7f0f44..e947e7d793 100644
--- a/application/palemoon/base/content/browser-menubar.inc
+++ b/application/palemoon/base/content/browser-menubar.inc
@@ -534,43 +534,12 @@
                     label="&webDeveloperMenu.label;"
                     accesskey="&webDeveloperMenu.accesskey;">
                 <menupopup id="menuWebDeveloperPopup">
-#ifdef MOZ_DEVTOOLS
-				<menuitem id="menu_devToolbox"
-                            observes="devtoolsMenuBroadcaster_DevToolbox"
-                            accesskey="&devToolboxMenuItem.accesskey;"/>
-                  <menuseparator id="menu_devtools_separator"/>
-                  <menuitem id="menu_devToolbar"
-                            observes="devtoolsMenuBroadcaster_DevToolbar"
-                            accesskey="&devToolbarMenu.accesskey;"/>
-                  <menuitem id="menu_chromeDebugger"
-                            observes="devtoolsMenuBroadcaster_ChromeDebugger"/>
-                  <menuitem id="menu_browserConsole"
-                            observes="devtoolsMenuBroadcaster_BrowserConsole"
-                            accesskey="&browserConsoleCmd.accesskey;"/>
-                  <menuitem id="menu_responsiveUI"
-                            observes="devtoolsMenuBroadcaster_ResponsiveUI"
-                            accesskey="&responsiveDesignTool.accesskey;"/>
-                  <menuitem id="menu_eyedropper"
-                            observes="devtoolsMenuBroadcaster_Eyedropper"
-                            accesskey="&eyedropper.accesskey;"/>
-                  <menuitem id="menu_scratchpad"
-                            observes="devtoolsMenuBroadcaster_Scratchpad"
-                            accesskey="&scratchpad.accesskey;"/>
-#endif
-                  <menuitem id="menu_pageSource"
-                            observes="devtoolsMenuBroadcaster_PageSource"
-                            accesskey="&pageSourceCmd.accesskey;"/>
                   <menuitem id="javascriptConsole"
                             observes="devtoolsMenuBroadcaster_ErrorConsole"
                             accesskey="&errorConsoleCmd.accesskey;"/>
-#ifdef MOZ_DEVTOOLS
-                  <menuitem id="menu_devtools_connect"
-                            observes="devtoolsMenuBroadcaster_connect"/>
-#endif
-                  <menuseparator id="devToolsEndSeparator"/>
-                  <menuitem id="getMoreDevtools"
-                            observes="devtoolsMenuBroadcaster_GetMoreTools"
-                            accesskey="&getMoreDevtoolsCmd.accesskey;"/>
+                  <menuitem id="menu_pageSource"
+                            observes="devtoolsMenuBroadcaster_PageSource"
+                            accesskey="&pageSourceCmd.accesskey;"/>
                 </menupopup>
               </menu>
               <menuitem id="menu_pageInfo"
diff --git a/application/palemoon/base/content/browser-sets.inc b/application/palemoon/base/content/browser-sets.inc
index 78cfb7faad..64228678ec 100644
--- a/application/palemoon/base/content/browser-sets.inc
+++ b/application/palemoon/base/content/browser-sets.inc
@@ -92,24 +92,9 @@
 
     <command id="Tools:Search" oncommand="BrowserSearch.webSearch();"/>
     <command id="Tools:Downloads" oncommand="BrowserDownloadsUI();"/>
-#ifdef MOZ_DEVTOOLS
-    <command id="Tools:DevToolbox" oncommand="gDevToolsBrowser.toggleToolboxCommand(gBrowser);"/>
-    <command id="Tools:DevToolbar" oncommand="DeveloperToolbar.toggle();" disabled="true" hidden="true"/>
-    <command id="Tools:DevToolbarFocus" oncommand="DeveloperToolbar.focusToggle();" disabled="true"/>
-    <command id="Tools:DevAppMgr" oncommand="gDevToolsBrowser.openAppManager(gBrowser);" disabled="true" hidden="true"/>
-    <command id="Tools:WebIDE" oncommand="gDevToolsBrowser.openWebIDE();" disabled="true" hidden="true"/>
-    <command id="Tools:ChromeDebugger" oncommand="BrowserToolboxProcess.init();" disabled="true" hidden="true"/>
-    <command id="Tools:BrowserConsole" oncommand="HUDService.openBrowserConsoleOrFocus();"/>
-    <command id="Tools:Scratchpad" oncommand="Scratchpad.openScratchpad();" disabled="true" hidden="true"/>
-    <command id="Tools:ResponsiveUI" oncommand="ResponsiveUI.toggle();" disabled="true" hidden="true"/>
-    <command id="Tools:Eyedropper" oncommand="openEyedropper();"/>
-#endif
     <command id="Tools:Addons" oncommand="BrowserOpenAddonsMgr();"/>
     <command id="Tools:Permissions" oncommand="BrowserOpenPermissionsMgr();"/>
     <command id="Tools:ErrorConsole" oncommand="toJavaScriptConsole()" disabled="true" hidden="true"/>
-#ifdef MOZ_DEVTOOLS
-    <command id="Tools:DevToolsConnect" oncommand="gDevToolsBrowser.openConnectScreen(gBrowser)" disabled="true" hidden="true"/>
-#endif
     <command id="Tools:Sanitize"
      oncommand="Cc['@mozilla.org/browser/browserglue;1'].getService(Ci.nsIBrowserGlue).sanitize(window);"/>
     <command id="Tools:PrivateBrowsing"
@@ -170,46 +155,6 @@
 #endif
     <broadcaster id="workOfflineMenuitemState"/>
 
-#ifdef MOZ_DEVTOOLS
-    <!-- DevTools broadcasters -->
-    <broadcaster id="devtoolsMenuBroadcaster_DevToolbox"
-                 label="&devToolboxMenuItem.label;"
-                 type="checkbox" autocheck="false"
-                 command="Tools:DevToolbox"
-                 key="key_devToolbox"/>
-    <broadcaster id="devtoolsMenuBroadcaster_DevToolbar"
-                 label="&devToolbarMenu.label;"
-                 type="checkbox" autocheck="false"
-                 command="Tools:DevToolbar"
-                 key="key_devToolbar"/>
-    <broadcaster id="devtoolsMenuBroadcaster_DevAppMgr"
-                 label="&devAppMgrMenu.label;"
-                 command="Tools:DevAppMgr"/>
-    <broadcaster id="devtoolsMenuBroadcaster_webide"
-                 label="&webide.label;"
-                 command="Tools:WebIDE"
-                 key="key_webide"/>
-    <broadcaster id="devtoolsMenuBroadcaster_ChromeDebugger"
-                 label="&chromeDebuggerMenu.label;"
-                 command="Tools:ChromeDebugger"/>
-    <broadcaster id="devtoolsMenuBroadcaster_BrowserConsole"
-                 label="&browserConsoleCmd.label;"
-                 key="key_browserConsole"
-                 command="Tools:BrowserConsole"/>
-    <broadcaster id="devtoolsMenuBroadcaster_Scratchpad"
-                 label="&scratchpad.label;"
-                 command="Tools:Scratchpad"
-                 key="key_scratchpad"/>
-    <broadcaster id="devtoolsMenuBroadcaster_ResponsiveUI"
-                 label="&responsiveDesignTool.label;"
-                 type="checkbox" autocheck="false"
-                 command="Tools:ResponsiveUI"
-                 key="key_responsiveUI"/>
-    <broadcaster id="devtoolsMenuBroadcaster_Eyedropper"
-                 label="&eyedropper.label;"
-                 type="checkbox" autocheck="false"
-                 command="Tools:Eyedropper"/>
-#endif
     <broadcaster id="devtoolsMenuBroadcaster_PageSource"
                  label="&pageSourceCmd.label;"
                  key="key_viewSource"
@@ -217,14 +162,6 @@
     <broadcaster id="devtoolsMenuBroadcaster_ErrorConsole"
                  label="&errorConsoleCmd.label;"
                  command="Tools:ErrorConsole"/>
-    <broadcaster id="devtoolsMenuBroadcaster_GetMoreTools"
-                 label="&getMoreDevtoolsCmd.label;"
-                 oncommand="openUILinkIn(gPrefService.getCharPref('browser.getdevtools.url'), 'tab');"/>
-#ifdef MOZ_DEVTOOLS
-    <broadcaster id="devtoolsMenuBroadcaster_connect"
-                 label="&devtoolsConnect.label;"
-                 command="Tools:DevToolsConnect"/>
-#endif
   </broadcasterset>
 
   <keyset id="mainKeyset">
@@ -271,21 +208,6 @@
     <key id="key_openDownloads" key="&downloads.commandkey;" command="Tools:Downloads" modifiers="accel"/>
 #endif
     <key id="key_openAddons" key="&addons.commandkey;" command="Tools:Addons" modifiers="accel,shift"/>
-#ifdef MOZ_DEVTOOLS
-    <key id="key_browserConsole" key="&browserConsoleCmd.commandkey;" command="Tools:BrowserConsole" modifiers="accel,shift"/>
-    <key id="key_devToolbox" keycode="VK_F12" keytext="F12" command="Tools:DevToolbox"/>
-    <key id="key_devToolbar" keycode="&devToolbar.keycode;" modifiers="shift"
-         keytext="&devToolbar.keytext;" command="Tools:DevToolbarFocus"/>
-    <key id="key_responsiveUI" key="&responsiveDesignTool.commandkey;" command="Tools:ResponsiveUI"
-#ifdef XP_MACOSX
-        modifiers="accel,alt"
-#else
-        modifiers="accel,shift"
-#endif
-    />
-    <key id="key_scratchpad" keycode="&scratchpad.keycode;" modifiers="shift"
-         keytext="&scratchpad.keytext;" command="Tools:Scratchpad"/>
-#endif
     <key id="openFileKb" key="&openFileCmd.commandkey;" command="Browser:OpenFile"  modifiers="accel"/>
     <key id="key_savePage" key="&savePageCmd.commandkey;" command="Browser:SavePage" modifiers="accel"/>
     <key id="printKb" key="&printCmd.commandkey;" command="cmd_print"  modifiers="accel"/>
diff --git a/application/palemoon/base/content/browser.js b/application/palemoon/base/content/browser.js
index 328cc49758..056eef9c82 100644
--- a/application/palemoon/base/content/browser.js
+++ b/application/palemoon/base/content/browser.js
@@ -110,20 +110,6 @@ XPCOMUtils.defineLazyGetter(this, "PopupNotifications", function () {
   }
 });
 
-#ifdef MOZ_DEVTOOLS
-XPCOMUtils.defineLazyGetter(this, "DeveloperToolbar", function() {
-  let tmp = {};
-  Cu.import("resource://gre/modules/devtools/DeveloperToolbar.jsm", tmp);
-  return new tmp.DeveloperToolbar(window, document.getElementById("developer-toolbar"));
-});
-
-XPCOMUtils.defineLazyGetter(this, "BrowserToolboxProcess", function() {
-  let tmp = {};
-  Cu.import("resource://gre/modules/devtools/ToolboxProcess.jsm", tmp);
-  return tmp.BrowserToolboxProcess;
-});
-#endif
-
 XPCOMUtils.defineLazyModuleGetter(this, "PageThumbs",
   "resource://gre/modules/PageThumbs.jsm");
 
@@ -710,6 +696,8 @@ const gXSSObserver = {
 };
 
 var gBrowserInit = {
+  delayedStartupFinished: false,
+
   onLoad: function() {
     gMultiProcessBrowser = gPrefService.getBoolPref("browser.tabs.remote");
 
@@ -1168,27 +1156,6 @@ var gBrowserInit = {
         setUrlAndSearchBarWidthForConditionalForwardButton();
     });
 
-#ifdef MOZ_DEVTOOLS
-    // Enable Chrome Debugger?
-    let chromeEnabled = gPrefService.getBoolPref("devtools.chrome.enabled");
-    let remoteEnabled = chromeEnabled &&
-                        gPrefService.getBoolPref("devtools.debugger.chrome-enabled") &&
-                        gPrefService.getBoolPref("devtools.debugger.remote-enabled");
-    if (remoteEnabled) {
-      let cmd = document.getElementById("Tools:ChromeDebugger");
-      cmd.removeAttribute("disabled");
-      cmd.removeAttribute("hidden");
-    }
-
-    // Enable Scratchpad in the UI, if the preference allows this.
-    let scratchpadEnabled = gPrefService.getBoolPref(Scratchpad.prefEnabledName);
-    if (scratchpadEnabled) {
-      let cmd = document.getElementById("Tools:Scratchpad");
-      cmd.removeAttribute("disabled");
-      cmd.removeAttribute("hidden");
-    }
-#endif
-
     // Enable Error Console?
     let consoleEnabled = gPrefService.getBoolPref("devtools.errorconsole.enabled");
     if (consoleEnabled) {
@@ -1206,19 +1173,6 @@ var gBrowserInit = {
       document.getElementById("appmenu_charsetMenu").hidden = true;
 #endif
 
-#ifdef MOZ_DEVTOOLS
-    // Enable Responsive UI?
-    let responsiveUIEnabled = gPrefService.getBoolPref("devtools.responsiveUI.enabled");
-    if (responsiveUIEnabled) {
-      let cmd = document.getElementById("Tools:ResponsiveUI");
-      cmd.removeAttribute("disabled");
-      cmd.removeAttribute("hidden");
-    }
-
-    // Add Devtools menuitems and listeners
-    gDevToolsBrowser.registerBrowserWindow(window);
-#endif
-
     let appMenuButton = document.getElementById("appmenu-button");
     let appMenuPopup = document.getElementById("appmenu-popup");
     if (appMenuButton && appMenuPopup) {
@@ -1259,6 +1213,8 @@ var gBrowserInit = {
       setTimeout(function () { BrowserChromeTest.markAsReady(); }, 0);
     });
 
+    this.delayedStartupFinished = true;
+
     Services.obs.notifyObservers(window, "browser-delayed-startup-finished", "");
   },
 
@@ -1294,15 +1250,6 @@ var gBrowserInit = {
     if (!this._loadHandled)
       return;
 
-#ifdef MOZ_DEVTOOLS
-    gDevToolsBrowser.forgetBrowserWindow(window);
-
-    let desc = Object.getOwnPropertyDescriptor(window, "DeveloperToolbar");
-    if (desc && !desc.get) {
-      DeveloperToolbar.destroy();
-    }
-#endif
-
     // First clean up services initialized in gBrowserInit.onLoad (or those whose
     // uninit methods don't depend on the services having been initialized).
     
@@ -6885,23 +6832,6 @@ var TabContextMenu = {
   }
 };
 
-#ifdef MOZ_DEVTOOLS
-XPCOMUtils.defineLazyModuleGetter(this, "gDevTools",
-                                  "resource://gre/modules/devtools/gDevTools.jsm");
-
-XPCOMUtils.defineLazyModuleGetter(this, "gDevToolsBrowser",
-                                  "resource://gre/modules/devtools/gDevTools.jsm");
-
-Object.defineProperty(this, "HUDService", {
-  get: function HUDService_getter() {
-    let devtools = Cu.import("resource://gre/modules/devtools/Loader.jsm", {}).devtools;
-    return devtools.require("devtools/webconsole/hudservice").HUDService;
-  },
-  configurable: true,
-  enumerable: true
-});
-#endif
-
 // Prompt user to restart the browser in safe mode or normally
 function restart(safeMode)
 {
@@ -6990,49 +6920,6 @@ function toggleAddonBar() {
   setToolbarVisibility(addonBar, addonBar.collapsed);
 }
 
-#ifdef MOZ_DEVTOOLS
-var Scratchpad = {
-  prefEnabledName: "devtools.scratchpad.enabled",
-
-  openScratchpad: function SP_openScratchpad() {
-    return this.ScratchpadManager.openScratchpad();
-  }
-};
-
-XPCOMUtils.defineLazyGetter(Scratchpad, "ScratchpadManager", function() {
-  let tmp = {};
-  Cu.import("resource://gre/modules/devtools/scratchpad-manager.jsm", tmp);
-  return tmp.ScratchpadManager;
-});
-
-var ResponsiveUI = {
-  toggle: function RUI_toggle() {
-    this.ResponsiveUIManager.toggle(window, gBrowser.selectedTab);
-  }
-};
-
-XPCOMUtils.defineLazyGetter(ResponsiveUI, "ResponsiveUIManager", function() {
-  let tmp = {};
-  Cu.import("resource://gre/modules/devtools/responsivedesign.jsm", tmp);
-  return tmp.ResponsiveUIManager;
-});
-
-function openEyedropper() {
-  var eyedropper = new this.Eyedropper(this, { context: "menu",
-                                               copyOnSelect: true });
-  eyedropper.open();
-}
-
-Object.defineProperty(this, "Eyedropper", {
-  get: function() {
-    let devtools = Cu.import("resource://gre/modules/devtools/Loader.jsm", {}).devtools;
-    return devtools.require("devtools/eyedropper/eyedropper").Eyedropper;
-  },
-  configurable: true,
-  enumerable: true
-});
-#endif
-
 XPCOMUtils.defineLazyGetter(window, "gShowPageResizers", function () {
 #ifdef XP_WIN
   // Only show resizers on Windows 2000 and XP
diff --git a/application/palemoon/base/content/browser.xul b/application/palemoon/base/content/browser.xul
index 30b1838eaf..0a0ce01dcd 100644
--- a/application/palemoon/base/content/browser.xul
+++ b/application/palemoon/base/content/browser.xul
@@ -973,33 +973,6 @@
 
   <vbox id="browser-bottombox" layer="true">
     <notificationbox id="global-notificationbox"/>
-#ifdef MOZ_DEVTOOLS
-    <toolbar id="developer-toolbar"
-             class="devtools-toolbar"
-             hidden="true">
-#ifdef XP_MACOSX
-          <toolbarbutton id="developer-toolbar-closebutton"
-                         class="devtools-closebutton"
-                         oncommand="DeveloperToolbar.hide();"
-                         tooltiptext="&devToolbarCloseButton.tooltiptext;"/>
-#endif
-          <stack class="gclitoolbar-stack-node" flex="1">
-            <textbox class="gclitoolbar-input-node" rows="1"/>
-            <hbox class="gclitoolbar-complete-node"/>
-          </stack>
-          <toolbarbutton id="developer-toolbar-toolbox-button"
-                         class="developer-toolbar-button"
-                         observes="devtoolsMenuBroadcaster_DevToolbox"
-                         tooltiptext="&devToolbarToolsButton.tooltip;"/>
-#ifndef XP_MACOSX
-          <toolbarbutton id="developer-toolbar-closebutton"
-                         class="devtools-closebutton"
-                         oncommand="DeveloperToolbar.hide();"
-                         tooltiptext="&devToolbarCloseButton.tooltiptext;"/>
-#endif
-   </toolbar>
-#endif
-
     <toolbar id="addon-bar"
              toolbarname="&statusBar.label;" accesskey="&statusBar.accesskey;"
              collapsed="true"