diff --git a/src/browser/themes/shared/zen-browser-shared.css b/src/browser/themes/shared/zen-browser-shared.css
index 082d7a5ba..165b7b456 100644
--- a/src/browser/themes/shared/zen-browser-shared.css
+++ b/src/browser/themes/shared/zen-browser-shared.css
@@ -359,7 +359,7 @@ toolbarbutton#scrollbutton-up {
 }
 
 .tabbrowser-tab:not([fadein]) {
-  display: none;
+  display: none !important;
 }
 
 .tabbrowser-tab:is([multiselected="true"], [selected]) {