From a1d4f5b0a27752d31d7a7c3b6a7231fde3501696 Mon Sep 17 00:00:00 2001
From: Timo Tijhof <ttijhof@wikimedia.org>
Date: Tue, 26 Mar 2013 18:59:07 +0100
Subject: [PATCH] mw.loader: Guard against odd setTimeout behaviour in old
 Firefox

Bug: 46575
Change-Id: I80af730daa815f0c273fe942c570d1f0144bbbb1
---
 resources/mediawiki/mediawiki.js | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/resources/mediawiki/mediawiki.js b/resources/mediawiki/mediawiki.js
index 2ceb3eac78..d1cb41d6a0 100644
--- a/resources/mediawiki/mediawiki.js
+++ b/resources/mediawiki/mediawiki.js
@@ -487,7 +487,13 @@ var mw = ( function ( $, undefined ) {
 						// TODO: Use requestAnimationFrame in the future which will
 						// perform even better by not injecting styles while the browser
 						// is paiting.
-						setTimeout( addEmbeddedCSS );
+						setTimeout( function () {
+							// Can't pass addEmbeddedCSS to setTimeout directly because Firefox
+							// (below version 13) has the non-standard behaviour of passing a
+							// numerical "lateness" value as first argument to this callback
+							// http://benalman.com/news/2009/07/the-mysterious-firefox-settime/
+							addEmbeddedCSS();
+						} );
 						return;
 					}
 
-- 
2.20.1