diff --git a/toolkit/mozapps/extensions/content/aboutaddons.css b/toolkit/mozapps/extensions/content/aboutaddons.css
index 619ae975710359fe879f197c689969ed726de7c0..542adaf0aa4f9d7336d969754228c1a93640b6af 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");
 }
