diff --git a/userChrome.css b/userChrome.css
index 5efb058..715ddc0 100644
--- a/userChrome.css
+++ b/userChrome.css
@@ -4069,6 +4069,9 @@ tab[visuallyselected] > stack::after {
   --arrowpanel-menublank-padding: calc(var(--arrowpanel-menuicon-padding) * 2 + 8px) !important;
   --arrowpanel-menuimageblank-padding: calc(var(--arrowpanel-menuitem-padding) - 2px) !important;
 }
+.subviewbutton > .toolbarbutton-icon {
+  width: 16px;
+}
 
 #downloadsHistory .button-text,
 .subviewbutton > .toolbarbutton-text {