diff -r 000000000000 -r 6474c204b198 browser/themes/windows/customizableui/panelUIOverlay.css
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/themes/windows/customizableui/panelUIOverlay.css	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,146 @@
+/* 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
+
+#PanelUI-contents #zoom-out-btn {
+  padding-left: 12px;
+  padding-right: 12px;
+}
+
+#PanelUI-contents #zoom-in-btn {
+  padding-left: 12px;
+  padding-right: 12px;
+}
+
+/* bookmark panel submenus */
+
+#BMB_bookmarksPopup menupopup[placespopup=true] {
+  -moz-appearance: none;
+  background: transparent;
+  border: none;
+  padding: 6px;
+}
+
+#BMB_bookmarksPopup menupopup[placespopup=true] > hbox {
+  /* emulating chrome://browser/content/places/menu.xml#places-popup-arrow but without the arrow */
+  box-shadow: 0 0 4px rgba(0,0,0,0.2);
+  background: #FFF;
+  border: 1px solid rgba(0,0,0,0.25);
+  border-radius: 3.5px;
+  margin-top: -4px;
+}
+
+#BMB_bookmarksPopup menupopup {
+  padding-top: 2px;
+}
+
+/* Add some space at the top because there are no headers: */
+#BMB_bookmarksPopup menupopup[placespopup=true] > hbox > .popup-internal-box > .arrowscrollbox-scrollbox > .scrollbox-innerbox  {
+  padding-top: 4px;
+}
+
+#BMB_bookmarksPopup .menu-text {
+  color: #000;
+}
+
+#BMB_bookmarksPopup .subviewbutton[disabled=true] > .menu-text {
+  color: #6d6d6d;
+}
+
+/* bookmark panel separator */
+#BMB_bookmarksPopup menuseparator {
+  padding-top: 0;
+  padding-bottom: 0;
+}
+
+.subviewbutton > .menu-right,
+.subviewbutton > .menu-iconic-left {
+  padding-top: 1px;
+  margin-top: 1px;
+  margin-bottom: 2px;
+}
+
+/* Disabled empty item looks too small otherwise, because it has no icon. */
+menuitem.subviewbutton[disabled]:not(.menuitem-iconic),
+/* Same for checkbox menu items, whose icons lose size due to -moz-appearance: none: */
+menuitem[type="checkbox"].subviewbutton {
+  /* This is 16px for an icon + 3px for its margins + 1px for its padding +
+   * 2px for its border, see above */
+  min-height: 22px;
+}
+
+.subviewbutton > .toolbarbutton-text {
+  padding-top: 3px;
+  padding-bottom: 3px;
+}
+
+.widget-overflow-list .toolbarbutton-1 > .toolbarbutton-menubutton-button {
+  -moz-appearance: none;
+  border: 0;
+  -moz-margin-start: 3px;
+}
+
+.widget-overflow-list .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker {
+  padding: 0 2px;
+  -moz-padding-start: 0;
+  height: 18px;
+}
+
+.widget-overflow-list .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon {
+  padding: 0 6px;
+}
+
+.subviewbutton > .toolbarbutton-text {
+  -moz-padding-start: 16px;
+}
+
+.subviewbutton:-moz-any([image],[targetURI],.cui-withicon, .restoreallitem, .bookmark-item) > .toolbarbutton-text {
+  -moz-padding-start: 0;
+}
+
+.subviewbutton.bookmark-item > .toolbarbutton-icon {
+  -moz-margin-start: 3px;
+}
+
+/* subviewbutton entries for social sidebars have images that come from external
+/* sources, and are not guaranteed to be the size we want, so force the size on
+/* those icons. */
+toolbarbutton.social-provider-menuitem > .toolbarbutton-icon {
+  width: 16px;
+  height: 16px;
+}
+
+.subviewbutton:-moz-any([image],[targetURI],.cui-withicon, .restoreallitem, .bookmark-item)[checked="true"] > .toolbarbutton-icon {
+  visibility: hidden;
+}
+
+menu.subviewbutton > .menu-right {
+  -moz-appearance: none;
+  list-style-image: url(chrome://browser/skin/places/bookmarks-menu-arrow.png);
+  -moz-image-region: rect(0, 16px, 16px, 0);
+}
+
+menu[disabled="true"].subviewbutton > .menu-right {
+  -moz-image-region: rect(0, 32px, 16px, 16px);
+}
+
+%ifdef WINDOWS_AERO
+/* Win8 and beyond. */
+@media not all and (-moz-os-version: windows-vista) {
+  @media not all and (-moz-os-version: windows-win7) {
+    panelview .toolbarbutton-1,
+    .subviewbutton,
+    .widget-overflow-list .toolbarbutton-1,
+    .panelUI-grid .toolbarbutton-1 > .toolbarbutton-menubutton-button,
+    #BMB_bookmarksPopup menupopup[placespopup=true] > hbox,
+    #edit-controls@inAnyPanel@,
+    #zoom-controls@inAnyPanel@,
+    #edit-controls@inAnyPanel@ > toolbarbutton,
+    #zoom-controls@inAnyPanel@ > toolbarbutton {
+      border-radius: 0;
+    }
+  }
+}
+%endif