From a73be191760731c89d4674c12b418a0cf3ae242c Mon Sep 17 00:00:00 2001
From: tophf <tophf@gmx.com>
Date: Mon, 24 Feb 2020 15:34:32 +0300
Subject: [PATCH] fixup! ensure frame url is present

---
 popup/popup.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/popup/popup.js b/popup/popup.js
index 24d36ce0..950dec1a 100644
--- a/popup/popup.js
+++ b/popup/popup.js
@@ -219,6 +219,7 @@ function sortTabFrames(frames) {
   const sortedFrames = [...known.values(), ...unknown.values()];
   const urls = new Set([ABOUT_BLANK]);
   for (const f of sortedFrames) {
+    f.url = f.url || '';
     f.isDupe = urls.has(f.url);
     urls.add(f.url);
   }