From 154868ebbc445ac0a33ca7eaf641c7aa37617ab7 Mon Sep 17 00:00:00 2001
From: Ben Vinegar <ben@benv.ca>
Date: Fri, 11 Mar 2016 10:31:34 -0800
Subject: [PATCH] Capture NS_ERROR_FAILURE errors from Firefox

---
 src/utils.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/utils.js b/src/utils.js
index edf8bd84e519..b790f84314b8 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -26,8 +26,10 @@ function isEmptyObject(what) {
 // Sorta yanked from https://github.com/joyent/node/blob/aa3b4b4/lib/util.js#L560
 // with some tiny modifications
 function isError(what) {
+    var toString = objectPrototype.toString.call(what);
     return isObject(what) &&
-        objectPrototype.toString.call(what) === '[object Error]' ||
+        toString === '[object Error]' ||
+        toString === '[object Exception]' || // Firefox NS_ERROR_FAILURE Exceptions
         what instanceof Error;
 }