diff --git a/toolkit/mozapps/extensions/content/aboutaddons.css b/toolkit/mozapps/extensions/content/aboutaddons.css
index 232fca6975de67bc0d84969204e75bad358b6bc7..4bbfb2abb9ea4812005734eb95a0bd7b8bbab7ce 100644
--- a/toolkit/mozapps/extensions/content/aboutaddons.css
+++ b/toolkit/mozapps/extensions/content/aboutaddons.css
@@ -105,6 +105,13 @@ h2 {
 .category[name="theme"] {
   background-image: url("chrome://mozapps/skin/extensions/category-themes.svg");
 }
+
+@media -moz-pref('zen.theme.disable-lightweight') {
+  .category[name="theme"] {
+    display: none;
+  }
+}
+
 .category[name="plugin"] {
   background-image: url("chrome://mozapps/skin/extensions/category-plugins.svg");
 }