From ef4ea2271b67dd51dc0b15e2e0958999d64f3ce1 Mon Sep 17 00:00:00 2001
From: toasted-nutbread <toasted-nutbread@users.noreply.github.com>
Date: Thu, 24 Jun 2021 19:18:33 -0400
Subject: [PATCH] Fix handling of document.body as <frameset> (#1748)

---
 ext/js/app/popup.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/ext/js/app/popup.js b/ext/js/app/popup.js
index 43699735..63657dd3 100644
--- a/ext/js/app/popup.js
+++ b/ext/js/app/popup.js
@@ -503,7 +503,10 @@ class Popup extends EventDispatcher {
     }
 
     _getFrameParentElement() {
-        const defaultParent = document.body;
+        let defaultParent = document.body;
+        if (defaultParent !== null && defaultParent.tagName.toLowerCase() === 'frameset') {
+            defaultParent = document.documentElement;
+        }
         const fullscreenElement = DocumentUtil.getFullscreenElement();
         if (
             fullscreenElement === null ||