diff --git a/browser/base/content/browser-kde.xul b/browser/base/content/browser-kde.xul
new file mode 100644
--- /dev/null
+++ b/browser/base/content/browser-kde.xul
@@ -0,0 +1,1272 @@
+#filter substitution
+<?xml version="1.0"?>
+# -*- Mode: HTML -*-
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+<?xml-stylesheet href="chrome://browser/content/browser.css" type="text/css"?>
+<?xml-stylesheet href="chrome://browser/content/places/places.css" type="text/css"?>
+<?xml-stylesheet href="chrome://browser/skin/devtools/common.css" type="text/css"?>
+<?xml-stylesheet href="chrome://browser/skin/" type="text/css"?>
+
+<?xul-overlay href="chrome://global/content/editMenuOverlay.xul"?>
+<?xul-overlay href="chrome://browser/content/baseMenuOverlay.xul"?>
+<?xul-overlay href="chrome://browser/content/places/placesOverlay.xul"?>
+
+# All DTD information is stored in a separate file so that it can be shared by
+# hiddenWindow.xul.
+#include browser-doctype.inc
+
+<window id="main-window"
+        xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+        xmlns:svg="http://www.w3.org/2000/svg"
+        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+        onload="gBrowserInit.onLoad()" onunload="gBrowserInit.onUnload()" onclose="return WindowIsClosing();"
+        title="&mainWindow.title;@PRE_RELEASE_SUFFIX@"
+        title_normal="&mainWindow.title;@PRE_RELEASE_SUFFIX@"
+#ifdef XP_MACOSX
+        title_privatebrowsing="&mainWindow.title;@PRE_RELEASE_SUFFIX@&mainWindow.titlemodifiermenuseparator;&mainWindow.titlePrivateBrowsingSuffix;"
+        titledefault="&mainWindow.title;@PRE_RELEASE_SUFFIX@"
+        titlemodifier=""
+        titlemodifier_normal=""
+        titlemodifier_privatebrowsing="&mainWindow.titlePrivateBrowsingSuffix;"
+#else
+        title_privatebrowsing="&mainWindow.titlemodifier;@PRE_RELEASE_SUFFIX@ &mainWindow.titlePrivateBrowsingSuffix;"
+        titlemodifier="&mainWindow.titlemodifier;@PRE_RELEASE_SUFFIX@"
+        titlemodifier_normal="&mainWindow.titlemodifier;@PRE_RELEASE_SUFFIX@"
+        titlemodifier_privatebrowsing="&mainWindow.titlemodifier;@PRE_RELEASE_SUFFIX@ &mainWindow.titlePrivateBrowsingSuffix;"
+#endif
+        titlemenuseparator="&mainWindow.titlemodifiermenuseparator;"
+        lightweightthemes="true"
+        lightweightthemesfooter="browser-bottombox"
+        windowtype="navigator:browser"
+        macanimationtype="document"
+        screenX="4" screenY="4"
+        browsingmode="normal"
+        fullscreenbutton="true"
+        persist="screenX screenY width height sizemode">
+
+# All JS files which are not content (only) dependent that browser.xul
+# wishes to include *must* go into the global-scripts.inc file
+# so that they can be shared by macBrowserOverlay.xul.
+#include global-scripts.inc
+<script type="application/javascript" src="chrome://browser/content/nsContextMenu.js"/>
+
+<script type="application/javascript" src="chrome://global/content/contentAreaUtils.js"/>
+
+<script type="application/javascript" src="chrome://browser/content/places/editBookmarkOverlay.js"/>
+
+# All sets except for popupsets (commands, keys, stringbundles and broadcasters) *must* go into the
+# browser-sets.inc file for sharing with hiddenWindow.xul.
+#define FULL_BROWSER_WINDOW
+#include browser-sets.inc
+#undef FULL_BROWSER_WINDOW
+
+  <popupset id="mainPopupSet">
+    <menupopup id="tabContextMenu"
+               onpopupshowing="if (event.target == this) TabContextMenu.updateContextMenu(this);"
+               onpopuphidden="if (event.target == this) TabContextMenu.contextTab = null;">
+      <menuitem id="context_reloadTab" label="&reloadTab.label;" accesskey="&reloadTab.accesskey;"
+                oncommand="gBrowser.reloadTab(TabContextMenu.contextTab);"/>
+      <menuseparator/>
+      <menuitem id="context_pinTab" label="&pinAppTab.label;"
+                accesskey="&pinAppTab.accesskey;"
+                oncommand="gBrowser.pinTab(TabContextMenu.contextTab);"/>
+      <menuitem id="context_unpinTab" label="&unpinAppTab.label;" hidden="true"
+                accesskey="&unpinAppTab.accesskey;"
+                oncommand="gBrowser.unpinTab(TabContextMenu.contextTab);"/>
+      <menu id="context_tabViewMenu" label="&moveToGroup.label;"
+            accesskey="&moveToGroup.accesskey;">
+        <menupopup id="context_tabViewMenuPopup"
+                   onpopupshowing="if (event.target == this) TabView.moveToGroupPopupShowing(event);">
+          <menuseparator id="context_tabViewNamedGroups" hidden="true"/>
+          <menuitem id="context_tabViewNewGroup" label="&moveToNewGroup.label;"
+                    oncommand="TabView.moveTabTo(TabContextMenu.contextTab, null);"/>
+        </menupopup>
+      </menu>
+      <menuitem id="context_openTabInWindow" label="&moveToNewWindow.label;"
+                accesskey="&moveToNewWindow.accesskey;"
+                tbattr="tabbrowser-multiple"
+                oncommand="gBrowser.replaceTabWithWindow(TabContextMenu.contextTab);"/>
+      <menuseparator/>
+      <menuitem id="context_reloadAllTabs" label="&reloadAllTabs.label;" accesskey="&reloadAllTabs.accesskey;"
+                tbattr="tabbrowser-multiple-visible"
+                oncommand="gBrowser.reloadAllTabs();"/>
+      <menuitem id="context_bookmarkAllTabs"
+                label="&bookmarkAllTabs.label;"
+                accesskey="&bookmarkAllTabs.accesskey;"
+                command="Browser:BookmarkAllTabs"/>
+      <menuitem id="context_closeOtherTabs" label="&closeOtherTabs.label;" accesskey="&closeOtherTabs.accesskey;"
+                oncommand="gBrowser.removeAllTabsBut(TabContextMenu.contextTab);"/>
+      <menuseparator/>
+      <menuitem id="context_undoCloseTab"
+                label="&undoCloseTab.label;"
+                accesskey="&undoCloseTab.accesskey;"
+                observes="History:UndoCloseTab"/>
+      <menuitem id="context_closeTab" label="&closeTab.label;" accesskey="&closeTab.accesskey;"
+                oncommand="gBrowser.removeTab(TabContextMenu.contextTab, { animate: true });"/>
+    </menupopup>
+
+    <!-- bug 415444/582485: event.stopPropagation is here for the cloned version
+         of this menupopup -->
+    <menupopup id="backForwardMenu"
+               onpopupshowing="return FillHistoryMenu(event.target);"
+               oncommand="gotoHistoryIndex(event); event.stopPropagation();"
+               onclick="checkForMiddleClick(this, event);"/>
+    <tooltip id="aHTMLTooltip" onpopupshowing="return FillInHTMLTooltip(document.tooltipNode);"/>
+
+    <!-- for search and content formfill/pw manager -->
+    <panel type="autocomplete" id="PopupAutoComplete" noautofocus="true" hidden="true"/>
+
+    <!-- for url bar autocomplete -->
+    <panel type="autocomplete-richlistbox" id="PopupAutoCompleteRichResult" noautofocus="true" hidden="true"/>
+
+    <!-- for invalid form error message -->
+    <panel id="invalid-form-popup" type="arrow" orient="vertical" noautofocus="true" hidden="true" level="parent">
+      <description/>
+    </panel>
+
+    <panel id="editBookmarkPanel"
+           type="arrow"
+           footertype="promobox"
+           orient="vertical"
+           ignorekeys="true"
+           consumeoutsideclicks="true"
+           hidden="true"
+           onpopupshown="StarUI.panelShown(event);"
+           aria-labelledby="editBookmarkPanelTitle">
+      <row id="editBookmarkPanelHeader" align="center" hidden="true">
+        <vbox align="center">
+          <image id="editBookmarkPanelStarIcon"/>
+        </vbox>
+        <vbox>
+          <label id="editBookmarkPanelTitle"/>
+          <description id="editBookmarkPanelDescription"/>
+          <hbox>
+            <button id="editBookmarkPanelRemoveButton"
+                    class="editBookmarkPanelHeaderButton"
+                    oncommand="StarUI.removeBookmarkButtonCommand();"
+                    accesskey="&editBookmark.removeBookmark.accessKey;"/>
+          </hbox>
+        </vbox>
+      </row>
+      <vbox id="editBookmarkPanelContent" flex="1" hidden="true"/>
+      <hbox id="editBookmarkPanelBottomButtons" pack="end">
+#ifdef XP_UNIX
+        <button id="editBookmarkPanelDoneButton"
+                class="editBookmarkPanelBottomButton"
+                label="&editBookmark.done.label;"
+                default="true"
+                oncommand="StarUI.panel.hidePopup();"/>
+        <button id="editBookmarkPanelDeleteButton"
+                class="editBookmarkPanelBottomButton"
+                label="&editBookmark.cancel.label;"
+                oncommand="StarUI.cancelButtonOnCommand();"/>
+#else
+        <button id="editBookmarkPanelDeleteButton"
+                class="editBookmarkPanelBottomButton"
+                label="&editBookmark.cancel.label;"
+                oncommand="StarUI.cancelButtonOnCommand();"/>
+        <button id="editBookmarkPanelDoneButton"
+                class="editBookmarkPanelBottomButton"
+                label="&editBookmark.done.label;"
+                default="true"
+                oncommand="StarUI.panel.hidePopup();"/>
+#endif
+      </hbox>
+    </panel>
+
+    <panel id="socialActivatedNotification"
+           type="arrow"
+           hidden="true"
+           consumeoutsideclicks="true"
+           align="start"
+           role="alert">
+      <hbox flex="1">
+        <image src="chrome://browser/content/social-icon.png" class="popup-notification-icon"/>
+        <vbox flex="1">
+          <description id="social-activation-message" class="popup-notification-description"/>
+          <spacer flex="1"/>
+          <hbox pack="end" align="center" class="popup-notification-button-container">
+#ifndef XP_UNIX
+        <button id="social-undoactivation-button"
+                label="&social.activated.undobutton.label;"
+                accesskey="&social.activated.undobutton.accesskey;"
+                onclick="SocialUI.undoActivation();"/>
+        <button default="true"
+                autofocus="autofocus"
+                label="&social.ok.label;"
+                accesskey="&social.ok.accesskey;"
+                oncommand="SocialUI.notificationPanel.hidePopup();"/>
+#else
+        <button default="true"
+                autofocus="autofocus"
+                label="&social.ok.label;"
+                accesskey="&social.ok.accesskey;"
+                oncommand="SocialUI.notificationPanel.hidePopup();"/>
+        <button id="social-undoactivation-button"
+                label="&social.activated.undobutton.label;"
+                accesskey="&social.activated.undobutton.accesskey;"
+                onclick="SocialUI.undoActivation();"/>
+#endif
+          </hbox>
+        </vbox>
+      </hbox>
+    </panel>
+
+    <panel id="unsharePopup"
+           type="arrow"
+           orient="vertical"
+           ignorekeys="true"
+           hidden="true"
+           onpopupshown="SocialShareButton.panelShown(event);"
+           consumeoutsideclicks="true"
+           level="top">
+      <!-- Note that 'label', 'accesskey', 'value' and 'aria-label' attributes
+           for many of these elements are supplied by the provider and filled
+           in at runtime
+      -->
+      <row id="unsharePopupHeader" align="center">
+        <vbox align="center">
+          <image id="socialUserPortrait" onclick="SocialUI.showProfile();"/>
+        </vbox>
+        <vbox id="unsharePopupText">
+          <button id="socialUserDisplayName" pack="start"
+                  oncommand="SocialUI.showProfile();"/>
+          <spacer flex="1"/>
+          <label id="socialUserRecommendedText"/>
+        </vbox>
+      </row>
+      <hbox id="unsharePopupBottomButtons" pack="end">
+#ifndef XP_UNIX
+        <button id="unsharePopupStopSharingButton"
+                class="unsharePopupBottomButton"
+                command="Social:UnsharePage"/>
+        <button id="unsharePopupContinueSharingButton"
+                class="unsharePopupBottomButton"
+                default="true"
+                autofocus="autofocus"
+                oncommand="SocialShareButton.dismissUnsharePopup();"/>
+#else
+        <button id="unsharePopupContinueSharingButton"
+                class="unsharePopupBottomButton"
+                default="true"
+                autofocus="autofocus"
+                oncommand="SocialShareButton.dismissUnsharePopup();"/>
+        <button id="unsharePopupStopSharingButton"
+                class="unsharePopupBottomButton"
+                command="Social:UnsharePage"/>
+#endif
+      </hbox>
+    </panel>
+
+    <panel id="social-notification-panel"
+           class="social-panel"
+           type="arrow"
+           hidden="true"
+           consumeoutsideclicks="true"
+           noautofocus="true"/>
+    <panel id="social-flyout-panel"
+           class="social-panel"
+           onpopupshown="SocialFlyout.onShown()"
+           onpopuphidden="SocialFlyout.onHidden()"
+           side="right"
+           type="arrow"
+           hidden="true"
+           noautofocus="true"
+           position="topcenter topright"/>
+
+    <menupopup id="inspector-node-popup">
+      <menuitem id="inspectorHTMLCopyInner"
+                label="&inspectorHTMLCopyInner.label;"
+                accesskey="&inspectorHTMLCopyInner.accesskey;"
+                command="Inspector:CopyInner"/>
+      <menuitem id="inspectorHTMLCopyOuter"
+                label="&inspectorHTMLCopyOuter.label;"
+                accesskey="&inspectorHTMLCopyOuter.accesskey;"
+                command="Inspector:CopyOuter"/>
+      <menuseparator/>
+      <menuitem id="inspectorHTMLDelete"
+                label="&inspectorHTMLDelete.label;"
+                accesskey="&inspectorHTMLDelete.accesskey;"
+                command="Inspector:DeleteNode"/>
+    </menupopup>
+
+    <menupopup id="toolbar-context-menu"
+               onpopupshowing="onViewToolbarsPopupShowing(event);">
+      <menuseparator/>
+      <menuitem command="cmd_ToggleTabsOnTop"
+                type="checkbox"
+                label="&viewTabsOnTop.label;"
+                accesskey="&viewTabsOnTop.accesskey;"/>
+      <menuitem command="cmd_CustomizeToolbars"
+                label="&viewCustomizeToolbar.label;"
+                accesskey="&viewCustomizeToolbar.accesskey;"/>
+    </menupopup>
+
+    <menupopup id="blockedPopupOptions"
+               onpopupshowing="gPopupBlockerObserver.fillPopupList(event);"
+               onpopuphiding="gPopupBlockerObserver.onPopupHiding(event);">
+      <menuitem observes="blockedPopupAllowSite"/>
+      <menuitem observes="blockedPopupEditSettings"/>
+      <menuitem observes="blockedPopupDontShowMessage"/>
+      <menuseparator observes="blockedPopupsSeparator"/>
+    </menupopup>
+
+    <menupopup id="autohide-context"
+           onpopupshowing="FullScreen.getAutohide(this.firstChild);">
+      <menuitem type="checkbox" label="&fullScreenAutohide.label;"
+                accesskey="&fullScreenAutohide.accesskey;"
+                oncommand="FullScreen.setAutohide();"/>
+      <menuseparator/>
+      <menuitem label="&fullScreenExit.label;"
+                accesskey="&fullScreenExit.accesskey;"
+                oncommand="BrowserFullScreen();"/>
+    </menupopup>
+
+    <menupopup id="contentAreaContextMenu" pagemenu="start"
+               onpopupshowing="if (event.target != this)
+                                 return true;
+                               gContextMenu = new nsContextMenu(this, gBrowser, event.shiftKey);
+                               if (gContextMenu.shouldDisplay)
+                                 updateEditUIVisibility();
+                               return gContextMenu.shouldDisplay;"
+               onpopuphiding="if (event.target != this)
+                                return;
+                              gContextMenu.hiding();
+                              gContextMenu = null;
+                              updateEditUIVisibility();">
+#include browser-context.inc
+    </menupopup>
+
+    <menupopup id="placesContext"/>
+
+    <panel id="notification-popup"
+           type="arrow"
+           footertype="promobox"
+           position="after_start"
+           hidden="true"
+           orient="vertical"
+           role="alert"/>
+
+    <!-- Popup for site identity information -->
+    <panel id="identity-popup"
+           type="arrow"
+           hidden="true"
+           noautofocus="true"
+           consumeoutsideclicks="true"
+           onpopupshown="gIdentityHandler.onPopupShown(event);"
+           level="top">
+      <hbox id="identity-popup-container" align="top">
+        <image id="identity-popup-icon"/>
+        <vbox id="identity-popup-content-box">
+          <label id="identity-popup-connectedToLabel"
+                 class="identity-popup-label"
+                 value="&identity.connectedTo;"/>
+          <label id="identity-popup-connectedToLabel2"
+                 class="identity-popup-label"
+                 value="&identity.unverifiedsite2;"/>
+          <description id="identity-popup-content-host"
+                       class="identity-popup-description"/>
+          <label id="identity-popup-runByLabel"
+                 class="identity-popup-label"
+                 value="&identity.runBy;"/>
+          <description id="identity-popup-content-owner"
+                       class="identity-popup-description"/>
+          <description id="identity-popup-content-supplemental"
+                       class="identity-popup-description"/>
+          <description id="identity-popup-content-verifier"
+                       class="identity-popup-description"/>
+          <hbox id="identity-popup-encryption" flex="1">
+            <vbox>
+              <image id="identity-popup-encryption-icon"/>
+            </vbox>
+            <description id="identity-popup-encryption-label" flex="1"
+                         class="identity-popup-description"/>
+          </hbox>
+          <!-- Footer button to open security page info -->
+          <hbox id="identity-popup-button-container" pack="end">
+            <button id="identity-popup-more-info-button"
+                    label="&identity.moreInfoLinkText;"
+                    onblur="gIdentityHandler.hideIdentityPopup();"
+                    oncommand="gIdentityHandler.handleMoreInfoClick(event);"/>
+          </hbox>
+        </vbox>
+      </hbox>
+    </panel>
+
+    <tooltip id="urlTooltip">
+      <label crop="center" flex="1" class="tooltip-label"/>
+    </tooltip>
+
+    <panel id="ctrlTab-panel" class="KUI-panel" hidden="true" norestorefocus="true" level="top">
+      <hbox>
+        <button class="ctrlTab-preview" flex="1"/>
+        <button class="ctrlTab-preview" flex="1"/>
+        <button class="ctrlTab-preview" flex="1"/>
+        <button class="ctrlTab-preview" flex="1"/>
+        <button class="ctrlTab-preview" flex="1"/>
+        <button class="ctrlTab-preview" flex="1"/>
+      </hbox>
+      <hbox pack="center">
+        <button id="ctrlTab-showAll" class="ctrlTab-preview" noicon="true"/>
+      </hbox>
+    </panel>
+
+    <panel id="allTabs-panel" hidden="true" norestorefocus="true" ignorekeys="true"
+           onmouseover="allTabs._updateTabCloseButton(event);">
+      <hbox id="allTabs-meta" align="center">
+        <spacer flex="1"/>
+        <textbox id="allTabs-filter"
+                 tooltiptext="&allTabs.filter.emptyText;"
+                 type="search"
+                 oncommand="allTabs.filter();"/>
+        <spacer flex="1"/>
+        <toolbarbutton class="KUI-panel-closebutton"
+                       oncommand="allTabs.close()"
+                       tooltiptext="&closeCmd.label;"/>
+      </hbox>
+      <stack id="allTabs-stack">
+        <vbox id="allTabs-container"><hbox/></vbox>
+        <toolbarbutton id="allTabs-tab-close-button"
+                       class="tabs-closebutton"
+                       oncommand="allTabs.closeTab(event);"
+                       tooltiptext="&closeCmd.label;"
+                       style="visibility:hidden"/>
+      </stack>
+    </panel>
+
+    <!-- Bookmarks and history tooltip -->
+    <tooltip id="bhTooltip"/>
+
+    <panel id="customizeToolbarSheetPopup"
+           noautohide="true"
+           sheetstyle="&dialog.dimensions;"/>
+
+    <tooltip id="tabbrowser-tab-tooltip" onpopupshowing="gBrowser.createTooltip(event);"/>
+
+    <tooltip id="back-button-tooltip">
+      <label class="tooltip-label" value="&backButton.tooltip;"/>
+#ifdef XP_MACOSX
+      <label class="tooltip-label" value="&backForwardButtonMenuMac.tooltip;"/>
+#else
+      <label class="tooltip-label" value="&backForwardButtonMenu.tooltip;"/>
+#endif
+    </tooltip>
+
+    <tooltip id="forward-button-tooltip">
+      <label class="tooltip-label" value="&forwardButton.tooltip;"/>
+#ifdef XP_MACOSX
+      <label class="tooltip-label" value="&backForwardButtonMenuMac.tooltip;"/>
+#else
+      <label class="tooltip-label" value="&backForwardButtonMenu.tooltip;"/>
+#endif
+    </tooltip>
+  </popupset>
+
+#ifdef CAN_DRAW_IN_TITLEBAR
+<vbox id="titlebar">
+  <hbox id="titlebar-content">
+    <hbox id="appmenu-button-container">
+      <button id="appmenu-button"
+              type="menu"
+              label="&brandShortName;"
+              style="-moz-user-focus: ignore;">
+#include browser-appmenu.inc
+      </button>
+    </hbox>
+    <spacer id="titlebar-spacer" flex="1"/>
+    <hbox id="titlebar-buttonbox-container" align="start">
+      <hbox id="titlebar-buttonbox">
+        <toolbarbutton class="titlebar-button" id="titlebar-min" oncommand="window.minimize();"/>
+        <toolbarbutton class="titlebar-button" id="titlebar-max" oncommand="onTitlebarMaxClick();"/>
+        <toolbarbutton class="titlebar-button" id="titlebar-close" command="cmd_closeWindow"/>
+      </hbox>
+    </hbox>
+  </hbox>
+</vbox>
+#endif
+
+<deck flex="1" id="tab-view-deck">
+<vbox flex="1" id="browser-panel">
+
+  <toolbox id="navigator-toolbox"
+           defaultmode="icons" mode="icons"
+           iconsize="large">
+    <!-- Menu -->
+    <toolbar type="menubar" id="toolbar-menubar" class="chromeclass-menubar" customizable="true"
+             defaultset="menubar-items"
+             mode="icons" iconsize="small" defaulticonsize="small"
+             lockiconsize="true"
+#ifdef MENUBAR_CAN_AUTOHIDE
+             toolbarname="&menubarCmd.label;"
+             accesskey="&menubarCmd.accesskey;"
+#endif
+             context="toolbar-context-menu">
+      <toolbaritem id="menubar-items" align="center">
+# The entire main menubar is placed into browser-menubar.inc, so that it can be shared by
+# hiddenWindow.xul.
+#include browser-menubar.inc
+      </toolbaritem>
+
+#ifdef CAN_DRAW_IN_TITLEBAR
+      <hbox class="titlebar-placeholder" type="appmenu-button" ordinal="0"/>
+      <hbox class="titlebar-placeholder" type="caption-buttons" ordinal="1000"/>
+#endif
+    </toolbar>
+
+    <toolbar id="nav-bar" class="toolbar-primary chromeclass-toolbar"
+             toolbarname="&navbarCmd.label;" accesskey="&navbarCmd.accesskey;"
+             fullscreentoolbar="true" mode="icons" customizable="true"
+             iconsize="large"
+             defaultset="unified-back-forward-button,urlbar-container,reload-button,stop-button,search-container,home-button,bookmarks-menu-button-container,window-controls"
+             context="toolbar-context-menu">
+
+      <toolbaritem id="unified-back-forward-button" class="chromeclass-toolbar-additional"
+                   context="backForwardMenu" removable="true"
+                   forwarddisabled="true"
+                   title="&backForwardItem.title;">
+        <toolbarbutton id="back-button" class="toolbarbutton-1"
+                       label="&backCmd.label;"
+                       command="Browser:BackOrBackDuplicate"
+                       onclick="checkForMiddleClick(this, event);"
+                       tooltip="back-button-tooltip"/>
+        <toolbarbutton id="forward-button" class="toolbarbutton-1"
+                       label="&forwardCmd.label;"
+                       command="Browser:ForwardOrForwardDuplicate"
+                       onclick="checkForMiddleClick(this, event);"
+                       tooltip="forward-button-tooltip"/>
+        <dummyobservertarget hidden="true"
+                             onbroadcast="if (this.getAttribute('disabled') == 'true')
+                                            this.parentNode.setAttribute('forwarddisabled', 'true');
+                                          else
+                                            this.parentNode.removeAttribute('forwarddisabled');">
+          <observes element="Browser:ForwardOrForwardDuplicate" attribute="disabled"/>
+        </dummyobservertarget>
+      </toolbaritem>
+
+      <toolbaritem id="urlbar-container" align="center" flex="400" persist="width" combined="true"
+                   title="&locationItem.title;" class="chromeclass-location" removable="true">
+        <textbox id="urlbar" flex="1"
+                 placeholder="&urlbar.placeholder;"
+                 type="autocomplete"
+                 autocompletesearch="urlinline history"
+                 autocompletesearchparam="enable-actions"
+                 autocompletepopup="PopupAutoCompleteRichResult"
+                 completeselectedindex="true"
+                 tabscrolling="true"
+                 showcommentcolumn="true"
+                 showimagecolumn="true"
+                 enablehistory="true"
+                 maxrows="6"
+                 newlines="stripsurroundingwhitespace"
+                 oninput="gBrowser.userTypedValue = this.value;"
+                 ontextentered="this.handleCommand(param);"
+                 ontextreverted="return this.handleRevert();"
+                 pageproxystate="invalid"
+                 onfocus="document.getElementById('identity-box').style.MozUserFocus= 'normal'"
+                 onblur="setTimeout(function() document.getElementById('identity-box').style.MozUserFocus = '', 0);">
+          <box id="notification-popup-box" hidden="true" align="center">
+            <image id="default-notification-icon" class="notification-anchor-icon" role="button"/>
+            <image id="identity-notification-icon" class="notification-anchor-icon" role="button"/>
+            <image id="geo-notification-icon" class="notification-anchor-icon" role="button"/>
+            <image id="addons-notification-icon" class="notification-anchor-icon" role="button"/>
+            <image id="indexedDB-notification-icon" class="notification-anchor-icon" role="button"/>
+            <image id="password-notification-icon" class="notification-anchor-icon" role="button"/>
+            <image id="webapps-notification-icon" class="notification-anchor-icon" role="button"/>
+            <image id="plugins-notification-icon" class="notification-anchor-icon" role="button"/>
+          </box>
+          <!-- Use onclick instead of normal popup= syntax since the popup
+               code fires onmousedown, and hence eats our favicon drag events.
+               We only add the identity-box button to the tab order when the location bar
+               has focus, otherwise pressing F6 focuses it instead of the location bar -->
+          <box id="identity-box" role="button"
+               align="center"
+               onclick="gIdentityHandler.handleIdentityButtonEvent(event);"
+               onkeypress="gIdentityHandler.handleIdentityButtonEvent(event);"
+               ondragstart="gIdentityHandler.onDragStart(event);">
+            <image id="page-proxy-favicon"
+                   onclick="PageProxyClickHandler(event);"
+                   pageproxystate="invalid"/>
+            <hbox id="identity-icon-labels">
+              <label id="identity-icon-label" class="plain" flex="1"/>
+              <label id="identity-icon-country-label" class="plain"/>
+            </hbox>
+          </box>
+          <box id="urlbar-display-box" align="center">
+            <label id="urlbar-display" value="&urlbar.switchToTab.label;"/>
+          </box>
+          <hbox id="urlbar-icons">
+            <image id="page-report-button"
+                   class="urlbar-icon"
+                   hidden="true"
+                   tooltiptext="&pageReportIcon.tooltip;"
+                   onclick="gPopupBlockerObserver.onReportButtonClick(event);"/>
+
+            <label id="share-button-status" collapsed="true" role="status"/>
+            <image id="share-button"
+                   class="urlbar-icon"
+                   hidden="true"
+                   onclick="SocialShareButton.onClick(event);"/>
+
+            <image id="star-button"
+                   class="urlbar-icon"
+                   onclick="PlacesStarButton.onClick(event);"/>
+            <image id="go-button"
+                   class="urlbar-icon"
+                   tooltiptext="&goEndCap.tooltip;"
+                   onclick="gURLBar.handleCommand(event);"/>
+          </hbox>
+          <toolbarbutton id="urlbar-go-button"
+                         class="chromeclass-toolbar-additional"
+                         onclick="gURLBar.handleCommand(event);"
+                         tooltiptext="&goEndCap.tooltip;"/>
+          <toolbarbutton id="urlbar-reload-button"
+                         class="chromeclass-toolbar-additional"
+                         command="Browser:ReloadOrDuplicate"
+                         onclick="checkForMiddleClick(this, event);"
+                         tooltiptext="&reloadButton.tooltip;"/>
+          <toolbarbutton id="urlbar-stop-button"
+                         class="chromeclass-toolbar-additional"
+                         command="Browser:Stop"
+                         tooltiptext="&stopButton.tooltip;"/>
+        </textbox>
+      </toolbaritem>
+
+      <toolbarbutton id="reload-button" class="toolbarbutton-1 chromeclass-toolbar-additional"
+                     label="&reloadCmd.label;" removable="true"
+                     command="Browser:ReloadOrDuplicate"
+                     onclick="checkForMiddleClick(this, event);"
+                     tooltiptext="&reloadButton.tooltip;"/>
+
+      <toolbarbutton id="stop-button" class="toolbarbutton-1 chromeclass-toolbar-additional"
+                     label="&stopCmd.label;" removable="true"
+                     command="Browser:Stop"
+                     tooltiptext="&stopButton.tooltip;"/>
+
+      <toolbaritem id="search-container" title="&searchItem.title;"
+                   align="center" class="chromeclass-toolbar-additional"
+                   flex="100" persist="width" removable="true">
+        <searchbar id="searchbar" flex="1"/>
+      </toolbaritem>
+
+      <toolbarbutton id="home-button" class="toolbarbutton-1 chromeclass-toolbar-additional"
+                     persist="class" removable="true"
+                     label="&homeButton.label;"
+                     ondragover="homeButtonObserver.onDragOver(event)"
+                     ondragenter="homeButtonObserver.onDragOver(event)"
+                     ondrop="homeButtonObserver.onDrop(event)"
+                     ondragexit="homeButtonObserver.onDragExit(event)"
+                     onclick="BrowserGoHome(event);"
+                     aboutHomeOverrideTooltip="&abouthome.pageTitle;"/>
+
+      <toolbaritem id="social-toolbar-item"
+                   class="chromeclass-toolbar-additional"
+                   removable="false"
+                   title="&socialToolbar.title;"
+                   hidden="true">
+        <toolbarbutton id="social-provider-button"
+                       class="toolbarbutton-1"
+                       type="menu">
+          <menupopup id="social-statusarea-popup">
+            <menuitem id="social-statusarea-user" pack="start" align="center" class="menuitem-iconic"
+                  onclick="SocialUI.showProfile(); document.getElementById('social-statusarea-popup').hidePopup();">
+              <image id="social-statusarea-user-portrait"/>
+              <vbox>
+                <label id="social-statusarea-notloggedin"
+                       value="&social.notLoggedIn.label;"/>
+                <label id="social-statusarea-username"/>
+              </vbox>
+            </menuitem>
+#ifndef XP_WIN
+            <menuseparator/>
+#endif
+            <menuitem id="social-toggle-sidebar-menuitem"
+                      type="checkbox"
+                      autocheck="false"
+                      command="Social:ToggleSidebar"
+                      label="&social.toggleSidebar.label;"
+                      accesskey="&social.toggleSidebar.accesskey;"/>
+            <menuitem id="social-toggle-notifications-menuitem"
+                      type="checkbox"
+                      autocheck="false"
+                      command="Social:ToggleNotifications"
+                      label="&social.toggleNotifications.label;"
+                      accesskey="&social.toggleNotifications.accesskey;"/>
+            <menuseparator/>
+            <menuitem id="social-remove-menuitem"
+                      oncommand="SocialUI.disableWithConfirmation();"/>
+          </menupopup>
+        </toolbarbutton>
+      </toolbaritem>
+
+      <toolbaritem id="bookmarks-menu-button-container"
+                   class="chromeclass-toolbar-additional"
+                   removable="true"
+                   title="&bookmarksMenuButton.label;">
+        <toolbarbutton id="bookmarks-menu-button"
+                       type="menu"
+                       class="toolbarbutton-1"
+                       label="&bookmarksMenuButton.label;"
+                       tooltiptext="&bookmarksMenuButton.tooltip;"
+                       ondragenter="PlacesMenuDNDHandler.onDragEnter(event);"
+                       ondragover="PlacesMenuDNDHandler.onDragOver(event);"
+                       ondragexit="PlacesMenuDNDHandler.onDragExit(event);"
+                       ondrop="PlacesMenuDNDHandler.onDrop(event);">
+          <menupopup id="BMB_bookmarksPopup"
+                     placespopup="true"
+                     context="placesContext"
+                     openInTabs="children"
+                     oncommand="BookmarksEventHandler.onCommand(event, this.parentNode._placesView);"
+                     onclick="BookmarksEventHandler.onClick(event, this.parentNode._placesView);"
+                     onpopupshowing="BookmarksMenuButton.onPopupShowing(event);
+                                     if (!this.parentNode._placesView)
+                                       new PlacesMenu(event, 'place:folder=BOOKMARKS_MENU');"
+                     tooltip="bhTooltip" popupsinherittooltip="true">
+            <menuitem id="BMB_viewBookmarksToolbar"
+                      placesanonid="view-toolbar"
+                      toolbarId="PersonalToolbar"
+                      type="checkbox"
+                      oncommand="onViewToolbarCommand(event)"
+                      label="&viewBookmarksToolbar.label;"/>
+            <menuseparator/>
+            <menuitem id="BMB_bookmarksShowAll"
+                      label="&showAllBookmarks2.label;"
+                      command="Browser:ShowAllBookmarks"
+                      key="manBookmarkKb"/>
+            <menuseparator/>
+            <menuitem id="BMB_bookmarkThisPage"
+#ifndef XP_MACOSX
+                      class="menuitem-iconic"
+#endif
+                      label="&bookmarkThisPageCmd.label;"
+                      command="Browser:AddBookmarkAs"
+                      key="addBookmarkAsKb"/>
+            <menuitem id="BMB_subscribeToPageMenuitem"
+#ifndef XP_MACOSX
+                      class="menuitem-iconic"
+#endif
+                      label="&subscribeToPageMenuitem.label;"
+                      oncommand="return FeedHandler.subscribeToFeed(null, event);"
+                      onclick="checkForMiddleClick(this, event);"
+                      observes="singleFeedMenuitemState"/>
+            <menu id="BMB_subscribeToPageMenupopup"
+#ifndef XP_MACOSX
+                  class="menu-iconic"
+#endif
+                  label="&subscribeToPageMenupopup.label;"
+                  observes="multipleFeedsMenuState">
+              <menupopup id="BMB_subscribeToPageSubmenuMenupopup"
+                         onpopupshowing="return FeedHandler.buildFeedList(event.target);"
+                         oncommand="return FeedHandler.subscribeToFeed(null, event);"
+                         onclick="checkForMiddleClick(this, event);"/>
+            </menu>
+            <menuseparator/>
+            <menu id="BMB_bookmarksToolbar"
+                  placesanonid="toolbar-autohide"
+                  class="menu-iconic bookmark-item"
+                  label="&personalbarCmd.label;"
+                  container="true">
+              <menupopup id="BMB_bookmarksToolbarPopup"
+                         placespopup="true"
+                         context="placesContext"
+                         onpopupshowing="if (!this.parentNode._placesView)
+                                           new PlacesMenu(event, 'place:folder=TOOLBAR');"/>
+            </menu>
+            <menuseparator/>
+            <!-- Bookmarks menu items -->
+            <menuseparator builder="end"
+                           class="hide-if-empty-places-result"/>
+            <menuitem id="BMB_unsortedBookmarks"
+                      label="&bookmarksMenuButton.unsorted.label;"
+                      oncommand="PlacesCommandHook.showPlacesOrganizer('UnfiledBookmarks');"
+                      class="menuitem-iconic"/>
+          </menupopup>
+        </toolbarbutton>
+      </toolbaritem>
+
+      <hbox id="window-controls" hidden="true" pack="end">
+        <toolbarbutton id="minimize-button"
+                       tooltiptext="&fullScreenMinimize.tooltip;"
+                       oncommand="window.minimize();"/>
+
+        <toolbarbutton id="restore-button"
+                       tooltiptext="&fullScreenRestore.tooltip;"
+                       oncommand="BrowserFullScreen();"/>
+
+        <toolbarbutton id="close-button"
+                       tooltiptext="&fullScreenClose.tooltip;"
+                       oncommand="BrowserTryToCloseWindow();"/>
+      </hbox>
+    </toolbar>
+
+    <toolbarset id="customToolbars" context="toolbar-context-menu"/>
+
+    <toolbar id="PersonalToolbar"
+             mode="icons" iconsize="small" defaulticonsize="small"
+             lockiconsize="true"
+             class="chromeclass-directories"
+             context="toolbar-context-menu"
+             defaultset="personal-bookmarks"
+             toolbarname="&personalbarCmd.label;" accesskey="&personalbarCmd.accesskey;"
+             collapsed="true"
+             customizable="true">
+      <toolbaritem flex="1" id="personal-bookmarks" title="&bookmarksItem.title;"
+                   removable="true">
+        <hbox flex="1"
+              id="PlacesToolbar"
+              context="placesContext"
+              onclick="BookmarksEventHandler.onClick(event, this._placesView);"
+              oncommand="BookmarksEventHandler.onCommand(event, this._placesView);"
+              tooltip="bhTooltip"
+              popupsinherittooltip="true">
+          <toolbarbutton class="bookmark-item bookmarks-toolbar-customize"
+                         mousethrough="never"
+                         label="&bookmarksToolbarItem.label;"/>
+          <hbox flex="1">
+            <hbox align="center">
+              <image id="PlacesToolbarDropIndicator"
+                     mousethrough="always"
+                     collapsed="true"/>
+            </hbox>
+            <scrollbox orient="horizontal"
+                       id="PlacesToolbarItems"
+                       flex="1"/>
+            <toolbarbutton type="menu"
+                           id="PlacesChevron"
+                           class="chevron"
+                           mousethrough="never"
+                           collapsed="true"
+                           tooltiptext="&bookmarksToolbarChevron.tooltip;"
+                           onpopupshowing="document.getElementById('PlacesToolbar')
+                                                   ._placesView._onChevronPopupShowing(event);">
+              <menupopup id="PlacesChevronPopup"
+                         placespopup="true"
+                         tooltip="bhTooltip" popupsinherittooltip="true"
+                         context="placesContext"/>
+            </toolbarbutton>
+          </hbox>
+        </hbox>
+      </toolbaritem>
+    </toolbar>
+
+#ifdef MENUBAR_CAN_AUTOHIDE
+#ifndef CAN_DRAW_IN_TITLEBAR
+#define APPMENU_ON_TABBAR
+#endif
+#endif
+
+
+    <toolbar id="TabsToolbar"
+             class="toolbar-primary"
+             fullscreentoolbar="true"
+             customizable="true"
+             mode="icons" lockmode="true"
+             iconsize="small" defaulticonsize="small" lockiconsize="true"
+             aria-label="&tabsToolbar.label;"
+             context="toolbar-context-menu"
+#ifdef APPMENU_ON_TABBAR
+             defaultset="appmenu-toolbar-button,tabbrowser-tabs,new-tab-button,alltabs-button,tabs-closebutton"
+#else
+             defaultset="tabbrowser-tabs,new-tab-button,alltabs-button,tabs-closebutton"
+#endif
+             collapsed="true">
+
+#ifdef APPMENU_ON_TABBAR
+      <toolbarbutton id="appmenu-toolbar-button"
+                     class="chromeclass-toolbar-additional"
+                     type="menu"
+                     label="&brandShortName;"
+                     tooltiptext="&appMenuButton.tooltip;">
+#include browser-appmenu.inc
+      </toolbarbutton>
+#endif
+
+      <tabs id="tabbrowser-tabs"
+            class="tabbrowser-tabs"
+            tabbrowser="content"
+            flex="1"
+            setfocus="false"
+            tooltip="tabbrowser-tab-tooltip">
+        <tab class="tabbrowser-tab" selected="true" fadein="true"/>
+      </tabs>
+
+      <toolbarbutton id="new-tab-button"
+                     class="toolbarbutton-1 chromeclass-toolbar-additional"
+                     label="&tabCmd.label;"
+                     command="cmd_newNavigatorTab"
+                     onclick="checkForMiddleClick(this, event);"
+                     tooltiptext="&newTabButton.tooltip;"
+                     ondrop="newTabButtonObserver.onDrop(event)"
+                     ondragover="newTabButtonObserver.onDragOver(event)"
+                     ondragenter="newTabButtonObserver.onDragOver(event)"
+                     ondragexit="newTabButtonObserver.onDragExit(event)"
+                     removable="true"/>
+
+      <toolbarbutton id="alltabs-button"
+                     class="toolbarbutton-1 chromeclass-toolbar-additional tabs-alltabs-button"
+                     type="menu"
+                     label="&listAllTabs.label;"
+                     tooltiptext="&listAllTabs.label;"
+                     removable="true">
+        <menupopup id="alltabs-popup"
+                   position="after_end">
+          <menuitem id="menu_tabview"
+                    class="menuitem-iconic"
+                    key="key_tabview"
+                    label="&viewTabGroups.label;"
+                    command="Browser:ToggleTabView"
+                    observes="tabviewGroupsNumber"/>
+          <menuseparator id="alltabs-popup-separator"/>
+        </menupopup>
+      </toolbarbutton>
+
+      <toolbarbutton id="tabs-closebutton"
+                     class="close-button tabs-closebutton"
+                     command="cmd_close"
+                     label="&closeTab.label;"
+                     tooltiptext="&closeTab.label;"/>
+
+#ifdef CAN_DRAW_IN_TITLEBAR
+      <hbox class="titlebar-placeholder" type="appmenu-button" ordinal="0"/>
+      <hbox class="titlebar-placeholder" type="caption-buttons" ordinal="1000"/>
+#endif
+    </toolbar>
+
+    <toolbarpalette id="BrowserToolbarPalette">
+
+# Update primaryToolbarButtons in browser/themes/browserShared.inc when adding
+# or removing default items with the toolbarbutton-1 class.
+
+      <toolbarbutton id="print-button" class="toolbarbutton-1 chromeclass-toolbar-additional"
+                     label="&printButton.label;" command="cmd_print"
+                     tooltiptext="&printButton.tooltip;"/>
+
+      <!-- This is a placeholder for the Downloads Indicator.  It is visible
+           during the customization of the toolbar, in the palette, and before
+           the Downloads Indicator overlay is loaded. -->
+      <toolbarbutton id="downloads-button" class="toolbarbutton-1 chromeclass-toolbar-additional"
+                     oncommand="DownloadsIndicatorView.onCommand(event);"
+                     ondrop="DownloadsIndicatorView.onDrop(event);"
+                     ondragover="DownloadsIndicatorView.onDragOver(event);"
+                     ondragenter="DownloadsIndicatorView.onDragOver(event);"
+                     ondragleave="DownloadsIndicatorView.onDragLeave(event);"
+                     label="&downloads.label;"
+                     tooltiptext="&downloads.tooltip;"/>
+
+      <toolbarbutton id="history-button" class="toolbarbutton-1 chromeclass-toolbar-additional"
+                     observes="viewHistorySidebar" label="&historyButton.label;"
+                     tooltiptext="&historyButton.tooltip;"/>
+
+      <toolbarbutton id="bookmarks-button" class="toolbarbutton-1 chromeclass-toolbar-additional"
+                     observes="viewBookmarksSidebar"
+                     tooltiptext="&bookmarksButton.tooltip;"
+                     ondrop="bookmarksButtonObserver.onDrop(event)"
+                     ondragover="bookmarksButtonObserver.onDragOver(event)"
+                     ondragenter="bookmarksButtonObserver.onDragOver(event)"
+                     ondragexit="bookmarksButtonObserver.onDragExit(event)"/>
+
+      <toolbarbutton id="new-window-button" class="toolbarbutton-1 chromeclass-toolbar-additional"
+                     label="&newNavigatorCmd.label;"
+                     command="key_newNavigator"
+                     tooltiptext="&newWindowButton.tooltip;"
+                     ondrop="newWindowButtonObserver.onDrop(event)"
+                     ondragover="newWindowButtonObserver.onDragOver(event)"
+                     ondragenter="newWindowButtonObserver.onDragOver(event)"
+                     ondragexit="newWindowButtonObserver.onDragExit(event)"/>
+
+      <toolbarbutton id="fullscreen-button" class="toolbarbutton-1 chromeclass-toolbar-additional"
+                     observes="View:FullScreen"
+                     type="checkbox"
+                     label="&fullScreenCmd.label;"
+                     tooltiptext="&fullScreenButton.tooltip;"/>
+
+      <toolbaritem id="zoom-controls" class="chromeclass-toolbar-additional"
+                   title="&zoomControls.label;">
+        <toolbarbutton id="zoom-out-button" class="toolbarbutton-1"
+                       label="&fullZoomReduceCmd.label;"
+                       command="cmd_fullZoomReduce"
+                       tooltiptext="&zoomOutButton.tooltip;"/>
+        <toolbarbutton id="zoom-in-button" class="toolbarbutton-1"
+                       label="&fullZoomEnlargeCmd.label;"
+                       command="cmd_fullZoomEnlarge"
+                       tooltiptext="&zoomInButton.tooltip;"/>
+      </toolbaritem>
+
+      <toolbarbutton id="feed-button"
+                     type="menu"
+                     class="toolbarbutton-1 chromeclass-toolbar-additional"
+                     disabled="true"
+                     label="&feedButton.label;"
+                     tooltiptext="&feedButton.tooltip;"
+                     onclick="return FeedHandler.onFeedButtonClick(event);">
+        <menupopup position="after_end"
+                   id="feed-menu"
+                   onpopupshowing="return FeedHandler.buildFeedList(this);"
+                   oncommand="return FeedHandler.subscribeToFeed(null, event);"
+                   onclick="checkForMiddleClick(this, event);"/>
+      </toolbarbutton>
+
+      <toolbarbutton id="cut-button" class="toolbarbutton-1 chromeclass-toolbar-additional"
+                     label="&cutCmd.label;"
+                     command="cmd_cut"
+                     tooltiptext="&cutButton.tooltip;"/>
+
+      <toolbarbutton id="copy-button" class="toolbarbutton-1 chromeclass-toolbar-additional"
+                     label="&copyCmd.label;"
+                     command="cmd_copy"
+                     tooltiptext="&copyButton.tooltip;"/>
+
+      <toolbarbutton id="paste-button" class="toolbarbutton-1 chromeclass-toolbar-additional"
+                     label="&pasteCmd.label;"
+                     command="cmd_paste"
+                     tooltiptext="&pasteButton.tooltip;"/>
+
+#ifdef MOZ_SERVICES_SYNC
+      <toolbarbutton id="sync-button"
+                     class="toolbarbutton-1 chromeclass-toolbar-additional"
+                     label="&syncToolbarButton.label;"
+                     oncommand="gSyncUI.handleToolbarButton()"/>
+#endif
+
+      <toolbaritem id="navigator-throbber" title="&throbberItem.title;" align="center" pack="center"
+                   mousethrough="always">
+        <image/>
+      </toolbaritem>
+
+      <toolbarbutton id="tabview-button" class="toolbarbutton-1 chromeclass-toolbar-additional"
+                     label="&tabGroupsButton.label;"
+                     command="Browser:ToggleTabView"
+                     tooltiptext="&tabGroupsButton.tooltip;"
+                     observes="tabviewGroupsNumber"/>
+    </toolbarpalette>
+  </toolbox>
+
+  <hbox flex="1" id="browser">
+    <vbox id="browser-border-start" hidden="true" layer="true"/>
+    <vbox id="sidebar-box" hidden="true" class="chromeclass-extrachrome">
+      <sidebarheader id="sidebar-header" align="center">
+        <label id="sidebar-title" persist="value" flex="1" crop="end" control="sidebar"/>
+        <image id="sidebar-throbber"/>
+        <toolbarbutton class="tabs-closebutton" tooltiptext="&sidebarCloseButton.tooltip;" oncommand="toggleSidebar();"/>
+      </sidebarheader>
+      <browser id="sidebar" flex="1" autoscroll="false" disablehistory="true"
+                style="min-width: 14em; width: 18em; max-width: 36em;"/>
+    </vbox>
+
+    <splitter id="sidebar-splitter" class="chromeclass-extrachrome sidebar-splitter" hidden="true"/>
+    <vbox id="appcontent" flex="1">
+      <tabbrowser id="content" disablehistory="true"
+                  flex="1" contenttooltip="aHTMLTooltip"
+                  tabcontainer="tabbrowser-tabs"
+                  contentcontextmenu="contentAreaContextMenu"
+                  autocompletepopup="PopupAutoComplete"
+                  onclick="contentAreaClick(event, false);"/>
+      <chatbar id="pinnedchats" layer="true" mousethrough="always"/>
+      <statuspanel id="statusbar-display" inactive="true"/>
+    </vbox>
+    <splitter id="devtools-side-splitter" hidden="true"/>
+    <vbox id="devtools-sidebar-box" hidden="true"
+          style="min-width: 18em; width: 22em; max-width: 42em;" persist="width">
+      <toolbar id="devtools-sidebar-toolbar"
+               class="devtools-toolbar"
+               nowindowdrag="true"/>
+      <deck id="devtools-sidebar-deck" flex="1"/>
+    </vbox>
+    <splitter id="social-sidebar-splitter"
+              class="chromeclass-extrachrome sidebar-splitter"
+              observes="socialSidebarBroadcaster"/>
+    <vbox id="social-sidebar-box"
+          class="chromeclass-extrachrome"
+          observes="socialSidebarBroadcaster"
+          persist="width">
+      <browser id="social-sidebar-browser"
+               type="content"
+               disableglobalhistory="true"
+               flex="1"
+               style="min-width: 14em; width: 18em; max-width: 36em;"/>
+    </vbox>
+    <vbox id="browser-border-end" hidden="true" layer="true"/>
+  </hbox>
+
+  <hbox id="full-screen-warning-container" hidden="true" fadeout="true">
+    <hbox style="width: 100%;" pack="center"> <!-- Inner hbox needed due to bug 579776. -->
+      <vbox id="full-screen-warning-message" align="center">
+        <description id="full-screen-domain-text"/>
+        <description class="full-screen-description" value="&fullscreenExitHint.value;"/>
+        <vbox id="full-screen-approval-pane" align="center">
+          <description class="full-screen-description" value="&fullscreenApproval.value;"/>
+          <hbox>
+            <button label="&fullscreenAllowButton.label;"
+                    oncommand="FullScreen.setFullscreenAllowed(true);"
+                    class="full-screen-approval-button"/>
+            <button label="&fullscreenExitButton.label;"
+                    oncommand="FullScreen.setFullscreenAllowed(false);"
+                    class="full-screen-approval-button"/>
+          </hbox>
+          <checkbox id="full-screen-remember-decision"/>
+        </vbox>
+      </vbox>
+    </hbox>
+  </hbox>
+
+  <vbox id="browser-bottombox" layer="true">
+    <toolbar id="inspector-toolbar"
+             class="devtools-toolbar"
+             nowindowdrag="true"
+             hidden="true">
+#ifdef XP_MACOSX
+      <toolbarbutton id="highlighter-closebutton"
+                     class="devtools-closebutton"
+                     oncommand="InspectorUI.closeInspectorUI(false);"
+                     tooltiptext="&inspectCloseButton.tooltiptext;"/>
+#endif
+      <toolbarbutton id="inspector-inspect-toolbutton"
+                     class="devtools-toolbarbutton"
+                     command="Inspector:Inspect"/>
+      <toolbarbutton id="inspector-treepanel-toolbutton"
+                     class="devtools-toolbarbutton"
+                     tabindex="0"
+                     aria-label="&markupButton.arialabel;"
+                     accesskey="&markupButton.accesskey;"
+                     command="Inspector:HTMLPanel"/>
+      <arrowscrollbox id="inspector-breadcrumbs"
+                      flex="1" orient="horizontal"
+                      clicktoscroll="true"/>
+      <hbox id="inspector-tools">
+        <toolbarbutton id="inspector-3D-button"
+                       class="devtools-toolbarbutton"
+                       hidden="true"
+                       label="&inspect3DViewButton.label;"
+                       accesskey="&inspect3DViewButton.accesskey;"
+                       tabindex="0"
+                       command="Inspector:Tilt"/>
+        <toolbarbutton id="inspector-style-button"
+                       class="devtools-toolbarbutton"
+                       label="&inspectStyleButton.label;"
+                       accesskey="&inspectStyleButton.accesskey;"
+                       tabindex="0"
+                       command="Inspector:Sidebar"/>
+        <!-- registered tools go here -->
+      </hbox>
+#ifndef XP_MACOSX
+      <toolbarbutton id="highlighter-closebutton"
+                     class="devtools-closebutton"
+                     oncommand="InspectorUI.closeInspectorUI(false);"
+                     tooltiptext="&inspectCloseButton.tooltiptext;"/>
+#endif
+    </toolbar>
+
+    <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">
+            <hbox class="gclitoolbar-prompt">
+              <label class="gclitoolbar-prompt-label">&#187;</label>
+            </hbox>
+            <hbox class="gclitoolbar-complete-node"/>
+            <textbox class="gclitoolbar-input-node" rows="1"/>
+          </stack>
+          <toolbarbutton id="developer-toolbar-webconsole"
+                         class="developer-toolbar-button"
+                         observes="devtoolsMenuBroadcaster_WebConsole"/>
+          <toolbarbutton id="developer-toolbar-inspector"
+                         class="developer-toolbar-button"
+                         observes="devtoolsMenuBroadcaster_Inspect"/>
+          <toolbarbutton id="developer-toolbar-styleeditor"
+                         class="developer-toolbar-button"
+                         observes="devtoolsMenuBroadcaster_StyleEditor"/>
+          <toolbarbutton id="developer-toolbar-debugger"
+                         class="developer-toolbar-button"
+                         observes="devtoolsMenuBroadcaster_Debugger"/>
+          <toolbarbutton id="developer-toolbar-other-tools"
+                         type="menu"
+                         class="developer-toolbar-button"
+                         label="&devToolbarOtherToolsButton.label;">
+            <menupopup position="before_end">
+               <menuitem observes="devtoolsMenuBroadcaster_DevToolbar"/>
+               <menuitem observes="devtoolsMenuBroadcaster_ResponsiveUI"/>
+               <menuitem observes="devtoolsMenuBroadcaster_RemoteDebugger"/>
+               <menuitem observes="devtoolsMenuBroadcaster_ChromeDebugger"/>
+               <menuitem observes="devtoolsMenuBroadcaster_Scratchpad"/>
+               <menuitem observes="devtoolsMenuBroadcaster_StyleEditor"/>
+               <menuitem observes="devtoolsMenuBroadcaster_PageSource"/>
+               <menuitem observes="devtoolsMenuBroadcaster_ErrorConsole"/>
+               <menuseparator/>
+               <menuitem observes="devtoolsMenuBroadcaster_GetMoreTools"/>
+            </menupopup>
+          </toolbarbutton>
+
+#ifndef XP_MACOSX
+          <toolbarbutton id="developer-toolbar-closebutton"
+                         class="devtools-closebutton"
+                         oncommand="DeveloperToolbar.hide();"
+                         tooltiptext="&devToolbarCloseButton.tooltiptext;"/>
+#endif
+   </toolbar>
+
+    <toolbar id="addon-bar"
+             toolbarname="&addonBarCmd.label;" accesskey="&addonBarCmd.accesskey;"
+             collapsed="true"
+             class="toolbar-primary chromeclass-toolbar"
+             context="toolbar-context-menu" toolboxid="navigator-toolbox"
+             mode="icons" iconsize="small" defaulticonsize="small"
+             lockiconsize="true"
+             defaultset="addonbar-closebutton,spring,status-bar"
+             customizable="true"
+             key="key_toggleAddonBar">
+      <toolbarbutton id="addonbar-closebutton"
+                     tooltiptext="&addonBarCloseButton.tooltip;"
+                     oncommand="setToolbarVisibility(this.parentNode, false);"/>
+      <statusbar id="status-bar" ordinal="1000"/>
+    </toolbar>
+  </vbox>
+
+#ifndef XP_UNIX
+  <svg:svg height="0">
+    <svg:clipPath id="winstripe-keyhole-forward-clip-path" clipPathUnits="objectBoundingBox">
+      <svg:path d="M 0,0 C 0.16,0.11 0.28,0.29 0.28,0.5 0.28,0.71 0.16,0.89 0,1 L 1,1 1,0 0,0 z"/>
+    </svg:clipPath>
+    <svg:clipPath id="winstripe-urlbar-back-button-clip-path" clipPathUnits="userSpaceOnUse">
+      <svg:path d="M 0,0 0,7.8 C 2.5,11 4,14 4,18 4,22 2.5,25 0,28 l 0,22 10000,0 0,-50 L 0,0 z"/>
+    </svg:clipPath>
+  </svg:svg>
+#endif
+#ifdef XP_MACOSX
+  <svg:svg height="0">
+    <svg:clipPath id="pinstripe-keyhole-forward-clip-path" clipPathUnits="objectBoundingBox">
+      <svg:path d="M 0,0 C 0.15,0.12 0.25,0.3 0.25,0.5 0.25,0.7 0.15,0.88 0,1 L 1,1 1,0 0,0 z"/>
+    </svg:clipPath>
+    <svg:clipPath id="pinstripe-urlbar-back-button-clip-path" clipPathUnits="userSpaceOnUse">
+      <svg:path d="m 0,-5 0,4.03 C 3.6,1.8 6,6.1 6,11 6,16 3.6,20 0,23 l 0,27 10000,0 0,-55 L 0,-5 z"/>
+    </svg:clipPath>
+    <svg:clipPath id="pinstripe-tab-ontop-left-curve-clip-path" clipPathUnits="userSpaceOnUse">
+      <svg:path d="M 9,0 C 7.3,0 6,1.3 6,3 l 0,14 c 0,3 -2.2,5 -5,5 l -1,0 0,1 12,0 0,-1 0,-19 0,-3 -3,0 z"/>
+    </svg:clipPath>
+    <svg:clipPath id="pinstripe-tab-ontop-right-curve-clip-path" clipPathUnits="userSpaceOnUse">
+      <svg:path d="m 0,0 0,3 0,19 0,1 12,0 0,-1 -1,0 C 8.2,22 6,20 6,17 L 6,3 C 6,1.3 4.7,0 3,0 L 0,0 z"/>
+    </svg:clipPath>
+    <svg:clipPath id="pinstripe-tab-onbottom-left-curve-clip-path" clipPathUnits="userSpaceOnUse">
+      <svg:path d="m 0,0 0,1 1,0 c 2.8,0 5,2.2 5,5 l 0,14 c 0,2 1.3,3 3,3 l 3,0 0,-3 L 12,1 12,0 0,0 z"/>
+    </svg:clipPath>
+    <svg:clipPath id="pinstripe-tab-onbottom-right-curve-clip-path" clipPathUnits="userSpaceOnUse">
+      <svg:path d="m 0,0 0,1 0,19 0,3 3,0 c 1.7,0 3,-1 3,-3 L 6,6 C 6,3.2 8.2,1 11,1 L 12,1 12,0 0,0 z"/>
+    </svg:clipPath>
+  </svg:svg>
+#endif
+
+</vbox>
+# <iframe id="tab-view"> is dynamically appended as the 2nd child of #tab-view-deck.
+#     Introducing the iframe dynamically, as needed, was found to be better than
+#     starting with an empty iframe here in browser.xul from a Ts standpoint.
+</deck>
+
+</window>
diff --git a/browser/base/jar.mn b/browser/base/jar.mn
--- a/browser/base/jar.mn
+++ b/browser/base/jar.mn
@@ -36,16 +36,18 @@ browser.jar:
         content/browser/abouthome/mozilla.png         (content/abouthome/mozilla.png)
         content/browser/abouthome/noise.png           (content/abouthome/noise.png)
         content/browser/aboutRobots-icon.png          (content/aboutRobots-icon.png)
         content/browser/aboutRobots-widget-left.png   (content/aboutRobots-widget-left.png)
         content/browser/aboutSocialError.xhtml        (content/aboutSocialError.xhtml)
 *       content/browser/browser.css                   (content/browser.css)
 *       content/browser/browser.js                    (content/browser.js)
 *       content/browser/browser.xul                   (content/browser.xul)
+*       content/browser/browser-kde.xul               (content/browser-kde.xul)
+%       override chrome://browser/content/browser.xul chrome://browser/content/browser-kde.xul desktop=kde
 *       content/browser/browser-tabPreviews.xml       (content/browser-tabPreviews.xml)
         content/browser/content.js                    (content/content.js)
         content/browser/newtab/newTab.xul             (content/newtab/newTab.xul)
 *       content/browser/newtab/newTab.js              (content/newtab/newTab.js)
         content/browser/newtab/newTab.css             (content/newtab/newTab.css)
 *       content/browser/pageinfo/pageInfo.xul         (content/pageinfo/pageInfo.xul)
 *       content/browser/pageinfo/pageInfo.js          (content/pageinfo/pageInfo.js)
         content/browser/pageinfo/pageInfo.css         (content/pageinfo/pageInfo.css)
diff --git a/browser/components/build/nsModule.cpp b/browser/components/build/nsModule.cpp
--- a/browser/components/build/nsModule.cpp
+++ b/browser/components/build/nsModule.cpp
@@ -8,17 +8,17 @@
 #include "nsBrowserCompsCID.h"
 #include "DirectoryProvider.h"
 
 #if defined(XP_WIN)
 #include "nsWindowsShellService.h"
 #elif defined(XP_MACOSX)
 #include "nsMacShellService.h"
 #elif defined(MOZ_WIDGET_GTK2)
-#include "nsGNOMEShellService.h"
+#include "nsUnixShellService.h"
 #endif
 
 #if defined(XP_WIN)
 #include "nsIEHistoryEnumerator.h"
 #endif
 
 #include "rdf.h"
 #include "nsFeedSniffer.h"
@@ -32,18 +32,16 @@ using namespace mozilla::browser;
 
 /////////////////////////////////////////////////////////////////////////////
 
 NS_GENERIC_FACTORY_CONSTRUCTOR(DirectoryProvider)
 #if defined(XP_WIN)
 NS_GENERIC_FACTORY_CONSTRUCTOR(nsWindowsShellService)
 #elif defined(XP_MACOSX)
 NS_GENERIC_FACTORY_CONSTRUCTOR(nsMacShellService)
-#elif defined(MOZ_WIDGET_GTK2)
-NS_GENERIC_FACTORY_CONSTRUCTOR_INIT(nsGNOMEShellService, Init)
 #endif
 
 #if defined(XP_WIN)
 NS_GENERIC_FACTORY_CONSTRUCTOR(nsIEHistoryEnumerator)
 #endif
 
 NS_GENERIC_FACTORY_CONSTRUCTOR(nsFeedSniffer)
 
@@ -64,17 +62,17 @@ NS_DEFINE_NAMED_CID(NS_SHELLSERVICE_CID)
 #endif
 NS_DEFINE_NAMED_CID(NS_PRIVATE_BROWSING_SERVICE_WRAPPER_CID);
 
 static const mozilla::Module::CIDEntry kBrowserCIDs[] = {
     { &kNS_BROWSERDIRECTORYPROVIDER_CID, false, NULL, DirectoryProviderConstructor },
 #if defined(XP_WIN)
     { &kNS_SHELLSERVICE_CID, false, NULL, nsWindowsShellServiceConstructor },
 #elif defined(MOZ_WIDGET_GTK2)
-    { &kNS_SHELLSERVICE_CID, false, NULL, nsGNOMEShellServiceConstructor },
+    { &kNS_SHELLSERVICE_CID, false, NULL, nsUnixShellServiceConstructor },
 #endif
     { &kNS_FEEDSNIFFER_CID, false, NULL, nsFeedSnifferConstructor },
     { &kNS_BROWSER_ABOUT_REDIRECTOR_CID, false, NULL, AboutRedirector::Create },
 #if defined(XP_WIN)
     { &kNS_WINIEHISTORYENUMERATOR_CID, false, NULL, nsIEHistoryEnumeratorConstructor },
 #elif defined(XP_MACOSX)
     { &kNS_SHELLSERVICE_CID, false, NULL, nsMacShellServiceConstructor },
 #endif
diff --git a/browser/components/preferences/advanced.js b/browser/components/preferences/advanced.js
--- a/browser/components/preferences/advanced.js
+++ b/browser/components/preferences/advanced.js
@@ -23,16 +23,22 @@ var gAdvancedPane = {
     if (extraArgs && extraArgs["advancedTab"]){
       advancedPrefs.selectedTab = document.getElementById(extraArgs["advancedTab"]);
     } else {
       var preference = document.getElementById("browser.preferences.advanced.selectedTabIndex");
       if (preference.value !== null)
         advancedPrefs.selectedIndex = preference.value;
     }
 
+    var env = Components.classes["@mozilla.org/process/environment;1"]
+                        .getService(Components.interfaces.nsIEnvironment);
+    var kde_session = 0;
+    if (env.get('KDE_FULL_SESSION') == "true")
+      kde_session = 1;
+
 #ifdef HAVE_SHELL_SERVICE
     this.updateSetDefaultBrowser();
 #ifdef XP_WIN
     // In Windows 8 we launch the control panel since it's the only
     // way to get all file type association prefs. So we don't know
     // when the user will select the default.  We refresh here periodically
     // in case the default changes.  On other Windows OS's defaults can also
     // be set while the prefs are open.
@@ -725,14 +731,25 @@ var gAdvancedPane = {
    * Set browser as the operating system default browser.
    */
   setDefaultBrowser: function()
   {
     let shellSvc = getShellService();
     if (!shellSvc)
       return;
     shellSvc.setDefaultBrowser(true, false);
+    if (kde_session == 1) {
+      var shellObj = Components.classes["@mozilla.org/file/local;1"]
+                               .createInstance(Components.interfaces.nsILocalFile);
+      shellObj.initWithPath("/usr/bin/kwriteconfig");
+      var process = Components.classes["@mozilla.org/process/util;1"]
+                              .createInstance(Components.interfaces.nsIProcess);
+      process.init(shellObj);
+      var args = ["--file", "kdeglobals", "--group", "General", "--key",
+          "BrowserApplication", "MozillaFirefox"];
+      process.run(false, args, args.length);
+    }
     let selectedIndex =
       shellSvc.isDefaultBrowser(false, true) ? 1 : 0;
     document.getElementById("setDefaultPane").selectedIndex = selectedIndex;
   }
 #endif
 };
diff --git a/browser/components/shell/src/Makefile.in b/browser/components/shell/src/Makefile.in
--- a/browser/components/shell/src/Makefile.in
+++ b/browser/components/shell/src/Makefile.in
@@ -17,17 +17,18 @@ USE_STATIC_LIBS = 1
 
 ifeq ($(OS_ARCH),WINNT)
 CPPSRCS = nsWindowsShellService.cpp
 else
 ifeq (cocoa,$(MOZ_WIDGET_TOOLKIT))
 CPPSRCS = nsMacShellService.cpp
 else
 ifeq ($(MOZ_WIDGET_TOOLKIT), gtk2)
-CPPSRCS = nsGNOMEShellService.cpp
+CPPSRCS = nsUnixShellService.cpp nsGNOMEShellService.cpp nsKDEShellService.cpp
+LOCAL_INCLUDES += -I$(topsrcdir)/toolkit/xre
 endif
 endif
 endif
 
 ifdef CPPSRCS
 LIBRARY_NAME = shellservice_s
 endif
 
diff --git a/browser/components/shell/src/nsKDEShellService.cpp b/browser/components/shell/src/nsKDEShellService.cpp
new file mode 100644
--- /dev/null
+++ b/browser/components/shell/src/nsKDEShellService.cpp
@@ -0,0 +1,234 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/. */
+
+#include "nsKDEShellService.h"
+#include "nsShellService.h"
+#include "nsKDEUtils.h"
+#include "nsCOMPtr.h"
+#include "nsIPrefService.h"
+#include "nsIProcess.h"
+#include "nsIFile.h"
+#include "nsServiceManagerUtils.h"
+#include "nsComponentManagerUtils.h"
+#include "nsIMutableArray.h"
+#include "nsISupportsPrimitives.h"
+#include "nsArrayUtils.h"
+
+nsresult
+nsKDEShellService::Init()
+    {
+    if( !nsKDEUtils::kdeSupport())
+        return NS_ERROR_NOT_AVAILABLE;
+    return NS_OK;
+    }
+
+NS_IMPL_ISUPPORTS1(nsKDEShellService, nsIShellService)
+
+NS_IMETHODIMP
+nsKDEShellService::IsDefaultBrowser(bool aStartupCheck,
+                                    bool aForAllTypes,
+                                    bool* aIsDefaultBrowser)
+    {
+    *aIsDefaultBrowser = false;
+    if (aStartupCheck)
+        mCheckedThisSession = true;
+
+    nsCOMPtr<nsIMutableArray> command = do_CreateInstance( NS_ARRAY_CONTRACTID );
+    if (!command)
+        return NS_ERROR_FAILURE;
+
+    nsCOMPtr<nsISupportsCString> str = do_CreateInstance( NS_SUPPORTS_CSTRING_CONTRACTID );
+    if (!str)
+        return NS_ERROR_FAILURE;
+
+    str->SetData( NS_LITERAL_CSTRING( "ISDEFAULTBROWSER" ));
+    command->AppendElement( str, false );
+
+    if( nsKDEUtils::command( command ))
+        *aIsDefaultBrowser = true;
+    return NS_OK;
+    }
+
+NS_IMETHODIMP
+nsKDEShellService::SetDefaultBrowser(bool aClaimAllTypes,
+                                     bool aForAllUsers)
+    {
+    nsCOMPtr<nsIMutableArray> command = do_CreateInstance( NS_ARRAY_CONTRACTID );
+    if (!command)
+        return NS_ERROR_FAILURE;
+
+    nsCOMPtr<nsISupportsCString> cmdstr = do_CreateInstance( NS_SUPPORTS_CSTRING_CONTRACTID );
+    nsCOMPtr<nsISupportsCString> paramstr = do_CreateInstance( NS_SUPPORTS_CSTRING_CONTRACTID );
+    if (!cmdstr || !paramstr)
+        return NS_ERROR_FAILURE;
+
+    cmdstr->SetData( NS_LITERAL_CSTRING( "SETDEFAULTBROWSER" ));
+    command->AppendElement( cmdstr, false );
+
+    paramstr->SetData( aClaimAllTypes ? NS_LITERAL_CSTRING( "ALLTYPES" ) : NS_LITERAL_CSTRING( "NORMAL" ));
+    command->AppendElement( paramstr, false );
+
+    return nsKDEUtils::command( command ) ? NS_OK : NS_ERROR_FAILURE;
+    }
+
+NS_IMETHODIMP
+nsKDEShellService::GetShouldCheckDefaultBrowser(bool* aResult)
+{
+  // If we've already checked, the browser has been started and this is a
+  // new window open, and we don't want to check again.
+  if (mCheckedThisSession) {
+    *aResult = false;
+    return NS_OK;
+  }
+
+  nsCOMPtr<nsIPrefBranch> prefs;
+  nsCOMPtr<nsIPrefService> pserve(do_GetService(NS_PREFSERVICE_CONTRACTID));
+  if (pserve)
+    pserve->GetBranch("", getter_AddRefs(prefs));
+
+  if (prefs)
+    prefs->GetBoolPref(PREF_CHECKDEFAULTBROWSER, aResult);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsKDEShellService::SetShouldCheckDefaultBrowser(bool aShouldCheck)
+{
+  nsCOMPtr<nsIPrefBranch> prefs;
+  nsCOMPtr<nsIPrefService> pserve(do_GetService(NS_PREFSERVICE_CONTRACTID));
+  if (pserve)
+    pserve->GetBranch("", getter_AddRefs(prefs));
+
+  if (prefs)
+    prefs->SetBoolPref(PREF_CHECKDEFAULTBROWSER, aShouldCheck);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsKDEShellService::GetCanSetDesktopBackground(bool* aResult)
+{
+  *aResult = true;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsKDEShellService::SetDesktopBackground(nsIDOMElement* aElement,
+                                          PRInt32 aPosition)
+    {
+    return NS_ERROR_NOT_IMPLEMENTED;
+    }
+
+NS_IMETHODIMP
+nsKDEShellService::GetDesktopBackgroundColor(PRUint32 *aColor)
+    {
+    return NS_ERROR_NOT_IMPLEMENTED;
+    }
+
+NS_IMETHODIMP
+nsKDEShellService::SetDesktopBackgroundColor(PRUint32 aColor)
+    {
+    return NS_ERROR_NOT_IMPLEMENTED;
+    }
+
+NS_IMETHODIMP
+nsKDEShellService::OpenApplication(PRInt32 aApplication)
+    {
+    nsCOMPtr<nsIMutableArray> command = do_CreateInstance( NS_ARRAY_CONTRACTID );
+    if (!command)
+        return NS_ERROR_FAILURE;
+
+    nsCOMPtr<nsISupportsCString> str = do_CreateInstance( NS_SUPPORTS_CSTRING_CONTRACTID );
+    if (!str)
+        return NS_ERROR_FAILURE;
+
+    if( aApplication == APPLICATION_MAIL )
+        str->SetData( NS_LITERAL_CSTRING( "OPENMAIL" ));
+    else if( aApplication == APPLICATION_NEWS )
+        str->SetData( NS_LITERAL_CSTRING( "OPENNEWS" ));
+    else
+        return NS_ERROR_NOT_IMPLEMENTED;
+
+    command->AppendElement( str, false );
+    return nsKDEUtils::command( command ) ? NS_OK : NS_ERROR_FAILURE;
+    }
+
+NS_IMETHODIMP
+nsKDEShellService::OpenApplicationWithURI(nsIFile* aApplication, const nsACString& aURI)
+    {
+    nsCOMPtr<nsIMutableArray> command = do_CreateInstance( NS_ARRAY_CONTRACTID );
+    if (!command)
+        return NS_ERROR_FAILURE;
+
+    nsCOMPtr<nsISupportsCString> cmdstr = do_CreateInstance( NS_SUPPORTS_CSTRING_CONTRACTID );
+    nsCOMPtr<nsISupportsCString> appstr = do_CreateInstance( NS_SUPPORTS_CSTRING_CONTRACTID );
+    nsCOMPtr<nsISupportsCString> uristr = do_CreateInstance( NS_SUPPORTS_CSTRING_CONTRACTID );
+    if (!cmdstr || !appstr || !uristr)
+        return NS_ERROR_FAILURE;
+
+    cmdstr->SetData( NS_LITERAL_CSTRING( "RUN" ));
+    command->AppendElement( cmdstr, false );
+    nsCAutoString app;
+    nsresult rv = aApplication->GetNativePath( app );
+    NS_ENSURE_SUCCESS( rv, rv );
+    appstr->SetData( app );
+    command->AppendElement( appstr, false );
+    uristr->SetData( aURI );
+    command->AppendElement( uristr, false );
+    return nsKDEUtils::command( command ) ? NS_OK : NS_ERROR_FAILURE;
+    }
+
+NS_IMETHODIMP
+nsKDEShellService::GetDefaultFeedReader(nsIFile** _retval)
+    {
+    *_retval = nullptr;
+
+    nsCOMPtr<nsIMutableArray> command = do_CreateInstance( NS_ARRAY_CONTRACTID );
+    if( !command )
+        return NS_ERROR_FAILURE;
+
+    nsCOMPtr<nsISupportsCString> str = do_CreateInstance( NS_SUPPORTS_CSTRING_CONTRACTID );
+    if( !str )
+        return NS_ERROR_FAILURE;
+
+    str->SetData( NS_LITERAL_CSTRING( "GETDEFAULTFEEDREADER" ));
+    command->AppendElement( str, false );
+
+    nsCOMPtr<nsIArray> output;
+    if( !nsKDEUtils::command( command, getter_AddRefs( output ) ) )
+        return NS_ERROR_FAILURE;
+
+    PRUint32 length;
+    output->GetLength( &length );
+    if( length != 1 )
+        return NS_ERROR_FAILURE;
+
+    nsCOMPtr<nsISupportsCString> resstr = do_QueryElementAt( output, 0 );
+    if( !resstr )
+        return NS_ERROR_FAILURE;
+
+    nsCAutoString path;
+    resstr->GetData( path );
+    if (path.IsEmpty())
+        return NS_ERROR_FAILURE;
+
+    nsresult rv;
+    nsCOMPtr<nsIFile> defaultReader =
+        do_CreateInstance("@mozilla.org/file/local;1", &rv);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    rv = defaultReader->InitWithNativePath(path);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    bool exists;
+    rv = defaultReader->Exists(&exists);
+    NS_ENSURE_SUCCESS(rv, rv);
+    if (!exists)
+        return NS_ERROR_FAILURE;
+
+    NS_ADDREF(*_retval = defaultReader);
+    return NS_OK;
+    }
diff --git a/browser/components/shell/src/nsKDEShellService.h b/browser/components/shell/src/nsKDEShellService.h
new file mode 100644
--- /dev/null
+++ b/browser/components/shell/src/nsKDEShellService.h
@@ -0,0 +1,59 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Shell Service.
+ *
+ * The Initial Developer of the Original Code is mozilla.org.
+ * Portions created by the Initial Developer are Copyright (C) 2004
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef nskdeshellservice_h____
+#define nskdeshellservice_h____
+
+#include "nsIShellService.h"
+#include "nsStringAPI.h"
+
+class nsKDEShellService : public nsIShellService
+{
+public:
+  nsKDEShellService() : mCheckedThisSession(PR_FALSE) { }
+
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSISHELLSERVICE
+
+  nsresult Init() NS_HIDDEN;
+
+private:
+  ~nsKDEShellService() {}
+
+  PRPackedBool mCheckedThisSession;
+};
+
+#endif // nskdeshellservice_h____
diff --git a/browser/components/shell/src/nsUnixShellService.cpp b/browser/components/shell/src/nsUnixShellService.cpp
new file mode 100644
--- /dev/null
+++ b/browser/components/shell/src/nsUnixShellService.cpp
@@ -0,0 +1,52 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Shell Service.
+ *
+ * The Initial Developer of the Original Code is mozilla.org.
+ * Portions created by the Initial Developer are Copyright (C) 2004
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "nsUnixShellService.h"
+#include "nsGNOMEShellService.h"
+#include "nsKDEShellService.h"
+#include "nsKDEUtils.h"
+#include "mozilla/ModuleUtils.h"
+
+NS_GENERIC_FACTORY_CONSTRUCTOR_INIT(nsGNOMEShellService, Init)
+NS_GENERIC_FACTORY_CONSTRUCTOR_INIT(nsKDEShellService, Init)
+
+NS_METHOD
+nsUnixShellServiceConstructor(nsISupports *aOuter, REFNSIID aIID, void **aResult)
+{
+    if( nsKDEUtils::kdeSupport())
+        return nsKDEShellServiceConstructor( aOuter, aIID, aResult );
+    return nsGNOMEShellServiceConstructor( aOuter, aIID, aResult );
+}
diff --git a/browser/components/shell/src/nsUnixShellService.h b/browser/components/shell/src/nsUnixShellService.h
new file mode 100644
--- /dev/null
+++ b/browser/components/shell/src/nsUnixShellService.h
@@ -0,0 +1,45 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Shell Service.
+ *
+ * The Initial Developer of the Original Code is mozilla.org.
+ * Portions created by the Initial Developer are Copyright (C) 2004
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef nsunixshellservice_h____
+#define nsunixshellservice_h____
+
+#include "nsIShellService.h"
+
+NS_METHOD
+nsUnixShellServiceConstructor(nsISupports *aOuter, REFNSIID aIID, void **aResult);
+
+#endif // nsunixshellservice_h____
diff --git a/browser/installer/package-manifest.in b/browser/installer/package-manifest.in
--- a/browser/installer/package-manifest.in
+++ b/browser/installer/package-manifest.in
@@ -561,18 +561,20 @@
 @BINPATH@/@PREF_DIR@/services-sync.js
 #endif
 @BINPATH@/greprefs.js
 @BINPATH@/defaults/autoconfig/platform.js
 @BINPATH@/defaults/autoconfig/prefcalls.js
 #ifndef LIBXUL_SDK
 ; Warning: changing the path to channel-prefs.js can cause bugs (Bug 756325)
 @BINPATH@/defaults/pref/channel-prefs.js
+@BINPATH@/defaults/pref/kde.js
 #else
 @BINPATH@/@PREF_DIR@/channel-prefs.js
+@BINPATH@/@PREF_DIR@/kde.js
 #endif
 @BINPATH@/defaults/profile/prefs.js
 
 ; [Layout Engine Resources]
 ; Style Sheets, Graphics and other Resources used by the layout engine. 
 @BINPATH@/res/EditorOverride.css
 @BINPATH@/res/contenteditable.css
 @BINPATH@/res/designmode.css