diff --git a/prefs/zen/theme.yaml b/prefs/zen/theme.yaml
index afbc4ba01..28250f6f9 100644
--- a/prefs/zen/theme.yaml
+++ b/prefs/zen/theme.yaml
@@ -36,7 +36,7 @@
   value: '@IS_TWILIGHT@'
 
 - name: zen.theme.hide-unified-extensions-button
-  value: false
+  value: true
 
 # ==== Mark: border radius ====
 
diff --git a/src/zen/common/styles/zen-single-components.css b/src/zen/common/styles/zen-single-components.css
index 094841385..87b40eed1 100644
--- a/src/zen/common/styles/zen-single-components.css
+++ b/src/zen/common/styles/zen-single-components.css
@@ -492,7 +492,7 @@ body > #confetti {
   }
 }
 
-@media (-moz-pref('zen.theme.hide-unified-extensions-button')) {
+@media -moz-pref('zen.theme.hide-unified-extensions-button') {
   #unified-extensions-button {
     display: none !important;
   }