Is there a way to change the tab title in private mode?

Question

I want to make a custom landing page for when I open a new private tab. Manage to do it in normal tab with a custom extension:

{
  "manifest_version": 3,
  "name": "Black Background New Tab",
  "version": "1.0",
  "description": "Changes the background color of new tabs to black.",
  "permissions": ["tabs", "activeTab", "storage"],
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "host_permissions": ["<all_urls>"],
  "incognito": "spanning"
}

newtab.html:

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>────────────────────────────────────────────</title>
  <style>
    <-- some style here
  </style>
</head>
<body>
  <-- some code here
</body>
</html>

But I cannot make it work in private windows/tabs.

Lubomyr Pryt · Accepted Answer · 2025-01-19 14:50:24Z

0

Here's similar question: Can you determine if Chrome is in incognito mode via a script?

The FileSystem API is disabled in incognito mode.

answered Jan 19 at 14:50

Lubomyr Pryt

3492 silver badges12 bronze badges

Add a comment |

Laplace'sDemon · Accepted Answer · 2025-01-19 15:11:56Z

Solved. Manifest.json:

 {
  "manifest_version": 3,
  "name": "Custom Private New Tab",
  "version": "1.0",
  "description": "Customizes the new private tab page.",
  "permissions": ["tabs", "activeTab"],
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "incognito": "split",
  "background": {
    "service_worker": "background.js"
  }
}

Background.js:

chrome.runtime.onInstalled.addListener(() => {
    console.log('Extension installed and background script running.');
  });

And the newtab.html, only change to show personal data.

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