From db86b9f871ced5efedcff9f9029de4e22eb48327 Mon Sep 17 00:00:00 2001
From: janekptacijarabaci <janekptacijarabaci@seznam.cz>
Date: Sun, 4 Dec 2016 19:31:14 +0100
Subject: [PATCH] Minor fix: Some sites - throws an errors

---
 browser/base/content/browser-plugins.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/browser/base/content/browser-plugins.js b/browser/base/content/browser-plugins.js
index 40daca47bf..769ac6d8af 100644
--- a/browser/base/content/browser-plugins.js
+++ b/browser/base/content/browser-plugins.js
@@ -182,6 +182,8 @@ var gPluginHandler = {
 
     let shouldShowNotification = false;
     let browser = gBrowser.getBrowserForDocument(doc.defaultView.top.document);
+    if (!browser)
+      return;
 
     switch (eventType) {
       case "PluginCrashed":