diff --git a/theme/parts/tabsbar.css b/theme/parts/tabsbar.css
index 8feecbb..8b48f65 100644
--- a/theme/parts/tabsbar.css
+++ b/theme/parts/tabsbar.css
@@ -451,9 +451,9 @@ tab {
 
 /* OPTIONAL: Hide single tab */
 @supports -moz-bool-pref("gnomeTheme.hideSingleTab") {
-	#tabbrowser-tabs tab[first-visible-tab="true"][last-visible-tab="true"]:not([pinned]),
-	#tabbrowser-tabs tab[first-visible-tab="true"][last-visible-tab="true"]:not([pinned]) ~ toolbarbutton,
-	#tabbrowser-tabs tab[first-visible-tab="true"][last-visible-tab="true"]:not([pinned]) ~ #tabbrowser-arrowscrollbox-periphery {
+	#tabbrowser-tabs tab:only-of-type,
+	#tabbrowser-tabs tab:only-of-type ~ toolbarbutton,
+	#tabbrowser-tabs tab:only-of-type ~ #tabbrowser-arrowscrollbox-periphery {
 		visibility: collapse;
 	}
 }