From b724f12298129653f86a29dea26b492c9749805b Mon Sep 17 00:00:00 2001
From: Brad Werth <bwerth@mozilla.com>
Date: Tue, 26 Nov 2019 22:31:20 +0000
Subject: [PATCH] Bug 1599304: Make SpecialPowers.Focus check for availability
 of this.manager.rootFrameLoader before dereferencing it. r=kmag

Differential Revision: https://phabricator.services.mozilla.com/D54648

--HG--
extra : moz-landing-system : lando
---
 testing/specialpowers/content/SpecialPowersParent.jsm | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/testing/specialpowers/content/SpecialPowersParent.jsm b/testing/specialpowers/content/SpecialPowersParent.jsm
index 23c93c0ca9d0..a14b5b307227 100644
--- a/testing/specialpowers/content/SpecialPowersParent.jsm
+++ b/testing/specialpowers/content/SpecialPowersParent.jsm
@@ -577,7 +577,9 @@ class SpecialPowersParent extends JSWindowActorParent {
         return undefined;
 
       case "SpecialPowers.Focus":
-        this.manager.rootFrameLoader.ownerElement.focus();
+        if (this.manager.rootFrameLoader) {
+          this.manager.rootFrameLoader.ownerElement.focus();
+        }
         return undefined;
 
       case "SpecialPowers.CreateFiles":