diff --git a/modules/custom-css/custom-css/css/customizer-control.css b/modules/custom-css/custom-css/css/customizer-control.css
index e7927ff2f661..1076f0c5d99f 100644
--- a/modules/custom-css/custom-css/css/customizer-control.css
+++ b/modules/custom-css/custom-css/css/customizer-control.css
@@ -44,11 +44,7 @@
 	padding-top: 3px;
 	opacity: .8;
 }
-@-moz-document url-prefix() {
-	#customize-control-wpcom_custom_css_content_width_control input[type="text"] + span {
-		top: 47px;
-	}
-}
+
 #customize-control-wpcom_custom_css_content_width_control input[type="text"]:focus + span {
 	opacity: 1;
 }
@@ -147,4 +143,3 @@ body.editing-css .wp-full-overlay.expanded {
 input[type=jetpackCss] {
 	display: none;
 }
-