From 88925e150bbcb64d1787b374c2115e6e28c3f6df Mon Sep 17 00:00:00 2001
From: Gaming4JC <g4jc@hyperbola.info>
Date: Sat, 4 Jan 2020 13:20:19 -0500
Subject: Bug 1357002 - Part 2: Don't call SetupCustomElement() if the custom
 element feature is pref-ed off;

Tag UXP Issue #1344
---
 dom/html/nsHTMLContentSink.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'dom')

diff --git a/dom/html/nsHTMLContentSink.cpp b/dom/html/nsHTMLContentSink.cpp
index 6e808f87e..bba5d38ab 100644
--- a/dom/html/nsHTMLContentSink.cpp
+++ b/dom/html/nsHTMLContentSink.cpp
@@ -265,7 +265,8 @@ NS_NewHTMLElement(Element** aResult, already_AddRefed<mozilla::dom::NodeInfo>&&
     return NS_ERROR_OUT_OF_MEMORY;
   }
 
-  if (isCustomElementName || aIs) {
+  if (CustomElementRegistry::IsCustomElementEnabled() &&
+      (isCustomElementName || aIs)) {
     nsContentUtils::SetupCustomElement(*aResult, aIs);
   }
 
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