From 64db46075ae7f42ceb8d0570d560e6fa57cb0f9d Mon Sep 17 00:00:00 2001
From: Fedor <fedor@mail.ru>
Date: Sun, 12 Apr 2020 13:02:51 +0300
Subject: [PATCH] [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 8a96cf724..8b39e03a0 100644
--- a/docshell/base/nsDocShell.cpp
+++ b/docshell/base/nsDocShell.cpp
@@ -859,6 +859,12 @@ nsDocShell::~nsDocShell()
     shPrivate->SetRootDocShell(nullptr);
   }
 
+  if (mContentViewer) {
+    mContentViewer->Close(nullptr);
+    mContentViewer->Destroy();
+    mContentViewer = nullptr;
+  }
+
   if (--gDocShellCount == 0) {
     NS_IF_RELEASE(sURIFixup);
   }