Examine source code of T-Box

{
  "short_name": "T-Box",
  "name": "T-Box",
  "version": "1.0.0",
  "manifest_version": 3,
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "./*"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{8df3700d-f31c-44fb-b5c6-f95a5d1edd1b}",
      "strict_min_version": "109.0"
    }
  }
}