From f8f69f8ceb18f4eae5e0b5b0b6f944e1b180d6c0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Emilio=20Cobos=20=C3=81lvarez?= <emilio@crisal.io>
Date: Fri, 28 Feb 2020 18:33:56 +0000
Subject: [PATCH] Bug 1618903 - Stack grid item rule shouldn't apply to
 anonymous children. r=dholbert

Differential Revision: https://phabricator.services.mozilla.com/D64786

--HG--
extra : moz-landing-system : lando
---
 toolkit/content/xul.css | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/toolkit/content/xul.css b/toolkit/content/xul.css
index 762c74cf711f..eded7c931cfe 100644
--- a/toolkit/content/xul.css
+++ b/toolkit/content/xul.css
@@ -383,7 +383,8 @@ stack {
   position: relative;
 }
 
-stack > *|* {
+/* We shouldn't style native anonymous children like scrollbars or what not */
+stack > *|*:not(:-moz-native-anonymous) {
   grid-area: 1 / 1;
   z-index: 0;