From 90d14d622f8bfacfa733ea93f426e7a752de9023 Mon Sep 17 00:00:00 2001
From: wbamberg <wbamberg@mozilla.com>
Date: Thu, 5 Jul 2018 09:20:56 -0700
Subject: [PATCH] Note getComputedStyle behavior (#2419)

---
 api/Window.json | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/api/Window.json b/api/Window.json
index 7333755ec33c37..56f78fc3fe2168 100644
--- a/api/Window.json
+++ b/api/Window.json
@@ -866,10 +866,16 @@
               "version_added": true
             },
             "firefox": {
-              "version_added": true
+              "version_added": true,
+              "notes": [
+                "Before version 62 this function returns <code>null</code> when called on a <code>Window</code> which has no presentation, such as an <code>iframe</code> with <code>display: none;</code>."
+              ]
             },
             "firefox_android": {
-              "version_added": true
+              "version_added": true,
+              "notes": [
+                "Before version 62 this function returns <code>null</code> when called on a <code>Window</code> which has no presentation, such as an <code>iframe</code> with <code>display: none;</code>."
+              ]
             },
             "ie": {
               "version_added": "9"