diff -r 000000000000 -r 6474c204b198 browser/themes/osx/customizableui/panelUIOverlay.css
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/themes/osx/customizableui/panelUIOverlay.css	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,142 @@
+/* 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 ../../shared/customizableui/panelUIOverlay.inc.css
+
+@media (min-resolution: 2dppx) {
+  #PanelUI-help[panel-multiview-anchor="true"]::after,
+  toolbarbutton[panel-multiview-anchor="true"] {
+    background-image: url(chrome://browser/skin/customizableui/subView-arrow-back-inverted@2x.png),
+                      linear-gradient(rgba(255,255,255,0.3), rgba(255,255,255,0));
+    background-size: 16px, auto;
+  }
+
+  #PanelUI-help[panel-multiview-anchor="true"]:-moz-locale-dir(rtl)::after,
+  toolbarbutton[panel-multiview-anchor="true"]:-moz-locale-dir(rtl) {
+    background-image: url(chrome://browser/skin/customizableui/subView-arrow-back-inverted-rtl@2x.png),
+                      linear-gradient(rgba(255,255,255,0.3), rgba(255,255,255,0));
+  }
+
+  #PanelUI-fxa-status {
+    list-style-image: url(chrome://browser/skin/sync-horizontalbar@2x.png);
+  }
+
+  #PanelUI-fxa-status[status="active"] {
+    list-style-image: url(chrome://browser/skin/syncProgress-horizontalbar@2x.png);
+  }
+
+  #PanelUI-customize {
+    list-style-image: url(chrome://browser/skin/menuPanel-customize@2x.png);
+  }
+
+  #main-window[customize-entered] #PanelUI-customize {
+    list-style-image: url(chrome://browser/skin/customizableui/menuPanel-customizeFinish@2x.png);
+  }
+
+  #PanelUI-help {
+    list-style-image: url(chrome://browser/skin/menuPanel-help@2x.png);
+  }
+
+  #PanelUI-quit {
+    list-style-image: url(chrome://browser/skin/menuPanel-exit@2x.png);
+  }
+
+  #PanelUI-fxa-status,
+  #PanelUI-customize,
+  #PanelUI-help,
+  #PanelUI-quit {
+    -moz-image-region: rect(0, 32px, 32px, 0);
+  }
+
+  #PanelUI-customize:hover,
+  #PanelUI-help:not([disabled]):hover,
+  #PanelUI-quit:not([disabled]):hover {
+    -moz-image-region: rect(0, 64px, 32px, 32px);
+  }
+
+  #PanelUI-customize:hover:active,
+  #PanelUI-help:not([disabled]):hover:active,
+  #PanelUI-quit:not([disabled]):hover:active {
+    -moz-image-region: rect(0, 96px, 32px, 64px);
+  }
+
+  #PanelUI-help[panel-multiview-anchor="true"] {
+    -moz-image-region: rect(0, 128px, 32px, 96px);
+    background-size: auto;
+  }
+
+  .subviewbutton[checked="true"] {
+    background-image: url("chrome://global/skin/menu/shared-menu-check@2x.png");
+  }
+
+}
+
+.panelUI-grid .toolbarbutton-1 {
+  margin-right: 0;
+  margin-left: 0;
+  margin-bottom: 0;
+}
+
+.subviewbutton > .toolbarbutton-text,
+.subviewbutton > .menu-iconic-text {
+  margin: 2px 0px;
+}
+
+.subviewbutton:-moz-any([image],[targetURI],.cui-withicon, .bookmark-item) > .toolbarbutton-text {
+  margin: 2px 6px;
+}
+
+.restoreallitem > .toolbarbutton-icon {
+  display: none;
+}
+
+.subviewbutton {
+  -moz-padding-start: 18px;
+}
+
+.subviewbutton[checked="true"] {
+  background-position: top 5px left 4px;
+}
+
+.subviewbutton[checked="true"]:-moz-locale-dir(rtl) {
+  background-position: top 5px right 4px;
+}
+
+.subviewbutton:not(:-moz-any([image],[targetURI],.cui-withicon, .bookmark-item)) > .menu-iconic-left {
+  display: none;
+}
+
+menu.subviewbutton,
+menuitem.subviewbutton:not(.panel-subview-footer) {
+  padding-top: 2px;
+  padding-bottom: 2px;
+}
+
+/* Override OSX-specific toolkit styles for the bookmarks panel */
+menu.subviewbutton > .menu-right {
+  -moz-margin-end: 0;
+}
+menu.subviewbutton > .menu-right > image {
+  -moz-image-region: rect(0, 9px, 10px, 0);
+}
+
+@media (min-resolution: 2dppx) {
+  menu.subviewbutton > .menu-right > image {
+    -moz-image-region: rect(0, 18px, 20px, 0);
+  }
+}
+
+.widget-overflow-list .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker {
+  -moz-margin-start: 4px;
+}
+
+.PanelUI-subView menuseparator,
+.cui-widget-panelview menuseparator {
+  padding: 0 !important;
+}
+
+toolbarpaletteitem:-moz-any([place="palette"], [place="panel"]) > toolbaritem[sdkstylewidget="true"] > .toolbarbutton-1 > .toolbarbutton-icon {
+  width: 32px;
+  height: 32px;
+}