diff --git a/browser/themes/gnomestripe/browser/browser.css b/browser/themes/gnomestripe/browser/browser.css
index 13ff4e4b03e3..61cb286ccceb 100644
--- a/browser/themes/gnomestripe/browser/browser.css
+++ b/browser/themes/gnomestripe/browser/browser.css
@@ -1293,6 +1293,7 @@ tabpanels {
 .tabs-closebutton {
   list-style-image: url("moz-icon://stock/gtk-close?size=menu");
   border: none;
+  margin-bottom: 1px;
 }
 
 .tabs-closebutton > .toolbarbutton-icon {