From 33b22f6157410db00249d1161810476dca485c4f Mon Sep 17 00:00:00 2001
From: wolfbeast <mcwerewolf@wolfbeast.com>
Date: Tue, 7 Apr 2020 10:55:20 +0200
Subject: [Docshell] Ensure nsDocShell::mContentViewer is released properly.

---
 docshell/base/nsDocShell.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/docshell/base/nsDocShell.cpp b/docshell/base/nsDocShell.cpp
index f53d89e819..d8d0614d57 100644
--- a/docshell/base/nsDocShell.cpp
+++ b/docshell/base/nsDocShell.cpp
@@ -860,6 +860,12 @@ nsDocShell::~nsDocShell()
     shPrivate->SetRootDocShell(nullptr);
   }
 
+  if (mContentViewer) {
+    mContentViewer->Close(nullptr);
+    mContentViewer->Destroy();
+    mContentViewer = nullptr;
+  }
+
   if (--gDocShellCount == 0) {
     NS_IF_RELEASE(sURIFixup);
   }
-- 
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