From e58c1b171c78df1e824e782326d296b91e3b40fc Mon Sep 17 00:00:00 2001
From: Kris Maglione <maglione.k@gmail.com>
Date: Wed, 14 Aug 2019 14:47:42 -0700
Subject: [PATCH] Bug 1572898: Follow-up: Hack around devtools trying to JSON
 stringify SpecialPowers. r=bustage,test-only

MANUAL PUSH: Bustage fix.
---
 testing/specialpowers/content/SpecialPowersAPI.jsm | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/testing/specialpowers/content/SpecialPowersAPI.jsm b/testing/specialpowers/content/SpecialPowersAPI.jsm
index 7f8555294814..3e5aa07777c2 100644
--- a/testing/specialpowers/content/SpecialPowersAPI.jsm
+++ b/testing/specialpowers/content/SpecialPowersAPI.jsm
@@ -161,6 +161,11 @@ class SpecialPowersAPI extends JSWindowActorChild {
     this._extensionListeners = null;
   }
 
+  // Hack around devtools sometimes trying to JSON stringify us.
+  toJSON() {
+    return {};
+  }
+
   receiveMessage(message) {
     switch (message.name) {
       case "Assert":