--- a/browser/themes/windows/browser.css
+++ b/browser/themes/windows/browser.css
@@ -104,20 +104,19 @@ toolbar:-moz-lwtheme {
   margin-top: 3px;
 }
 
 #main-window[tabsintitlebar][sizemode="normal"]:not([inFullscreen])[chromehidden~="menubar"] #toolbar-menubar ~ #TabsToolbar,
 #main-window[tabsintitlebar][sizemode="normal"]:not([inFullscreen]) #toolbar-menubar[autohide="true"][inactive] ~ #TabsToolbar {
   margin-top: var(--space-above-tabbar);
 }
 
-#navigator-toolbox {
+#navigator-toolbox,
+#navigator-toolbox > toolbar {
   -moz-appearance: none;
-  background-color: transparent;
-  border-top: none;
 }
 
 #navigator-toolbox::after {
   content: "";
   display: -moz-box;
   -moz-box-ordinal-group: 101; /* tabs toolbar is 100 */
   border-bottom: 1px solid ThreeDShadow;
 }
@@ -136,21 +135,16 @@ toolbar:-moz-lwtheme {
     }
   }
 }
 
 #navigator-toolbox:-moz-lwtheme::after {
   border-bottom-color: rgba(0,0,0,.3);
 }
 
-#navigator-toolbox > toolbar {
-  -moz-appearance: none;
-  border-style: none;
-}
-
 #navigator-toolbox > toolbar:not(#toolbar-menubar):not(#TabsToolbar) {
   background-clip: padding-box;
   background-image: linear-gradient(@toolbarHighlight@, @toolbarHighlight@);
 }
 
 @media (-moz-os-version: windows-win7) {
   #nav-bar {
     background-image: linear-gradient(@toolbarHighlight@, transparent) !important;