--- a/browser/themes/shared/customizableui/customizeMode.inc.css
+++ b/browser/themes/shared/customizableui/customizeMode.inc.css
@@ -58,21 +58,25 @@
 .customizationmode-button {
   border: 1px solid #b1b1b1;
   background-color: #fcfcfd;
   -moz-appearance: none;
 }
 
 .customizationmode-checkbox,
 .customizationmode-button {
-  color: rgb(71, 71, 71);
   margin: 6px 10px;
   padding: 2px 5px;
 }
 
+.customizationmode-checkbox:not(:-moz-lwtheme),
+.customizationmode-button {
+  color: rgb(71, 71, 71);
+}
+
 #customization-reset-button,
 #customization-undo-reset-button,
 #customization-done-button {
   min-width: 10em;
 }
 
 #customization-done-button {
   color: #fff;