From e463ca7ece2fc2deb6b6fe3df6de4d0da4cf8dbd Mon Sep 17 00:00:00 2001
From: tophf <tophf@gmx.com>
Date: Sat, 22 Jul 2017 07:39:43 +0300
Subject: [PATCH] setBadgeText: skip pre-rendered tabs

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

diff --git a/background/background.js b/background/background.js
index 13d12e2f..643cba2c 100644
--- a/background/background.js
+++ b/background/background.js
@@ -281,7 +281,10 @@ function updateIcon(tab, styles) {
       // Vivaldi bug workaround: setBadgeText must follow setBadgeBackgroundColor
       chrome.browserAction.setBadgeBackgroundColor({color});
       getTab(tab.id).then(() => {
-        chrome.browserAction.setBadgeText({text, tabId: tab.id});
+        // skip pre-rendered tabs
+        if (tab.index >= 0) {
+          chrome.browserAction.setBadgeText({text, tabId: tab.id});
+        }
       });
     });
   }