From 78b6950fe396cbd70cb57684a7691119477de607 Mon Sep 17 00:00:00 2001
From: Cameron McCormack <cam@mcc.id.au>
Date: Fri, 21 Dec 2012 10:36:42 +1100
Subject: [PATCH] Bug 814530 - Disable @supports on Release and Beta. r=dbaron

---
 modules/libpref/src/init/all.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/modules/libpref/src/init/all.js b/modules/libpref/src/init/all.js
index 5fb53d82de6..f7f1ddebcfc 100644
--- a/modules/libpref/src/init/all.js
+++ b/modules/libpref/src/init/all.js
@@ -1639,7 +1639,11 @@ pref("layout.css.dpi", -1);
 pref("layout.css.devPixelsPerPx", "-1.0");
 
 // Is support for the the @supports rule enabled?
+#ifdef RELEASE_BUILD
+pref("layout.css.supports-rule.enabled", false);
+#else
 pref("layout.css.supports-rule.enabled", true);
+#endif
 
 // Is support for CSS Flexbox enabled?
 pref("layout.css.flexbox.enabled", true);