From 665369699349a33cc786a5b8c8aa0127d619d812 Mon Sep 17 00:00:00 2001
From: Cameron Kaiser <classilla@floodgap.com>
Date: Thu, 17 Sep 2020 21:00:23 -0700
Subject: [PATCH] #622: M1646140

---
 parser/html/nsHtml5TreeBuilderCppSupplement.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/parser/html/nsHtml5TreeBuilderCppSupplement.h b/parser/html/nsHtml5TreeBuilderCppSupplement.h
index 526a67c6e..966ff15be 100644
--- a/parser/html/nsHtml5TreeBuilderCppSupplement.h
+++ b/parser/html/nsHtml5TreeBuilderCppSupplement.h
@@ -912,6 +912,9 @@ nsHtml5TreeBuilder::elementPopped(int32_t aNamespace, nsIAtom* aName, nsIContent
   }
   if (aNamespace == kNameSpaceID_SVG) {
     if (aName == nsHtml5Atoms::svg) {
+      if (!scriptingEnabled || mPreventScriptExecution) {
+        return;
+      }
       if (mBuilder) {
         nsHtml5TreeOperation::SvgLoad(static_cast<nsIContent*>(aElement));
         return;