diff --git a/src/toolkit/themes/shared/zen-popup.css b/src/toolkit/themes/shared/zen-popup.css
index 4f29b181b..34ed12936 100644
--- a/src/toolkit/themes/shared/zen-popup.css
+++ b/src/toolkit/themes/shared/zen-popup.css
@@ -262,7 +262,7 @@ toolbarbutton:not(
   margin-bottom: 5px !important;
 }
 
-.unified-extensions-item-action-button {
+panelview .unified-extensions-item-action-button {
   padding: 5px 20px !important;
 }