Examine source code of BayScope

{
  "manifest_version": 3,
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "version": "1.0.0",
  "short_name": "BayScope",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "default_locale": "en",
  "permissions": [
    "activeTab",
    "storage",
    "alarms",
    "contextMenus"
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; style-src 'self' 'unsafe-inline'; object-src 'none';"
  },
  "host_permissions": [
    "*://*.ebay.com/*",
    "*://*.ebay.de/*",
    "*://*.ebay.co.uk/*",
    "*://*.ebay.fr/*",
    "*://*.ebay.it/*",
    "*://*.ebay.es/*",
    "*://*.ebay.nl/*",
    "*://*.ebay.com.au/*",
    "*://*.ebay.ca/*",
    "*://*.ebay.at/*",
    "*://*.ebay.ch/*",
    "*://*.ebay.pl/*",
    "*://*.ebay.be/*",
    "*://*.ebay.ie/*",
    "https://extensionpay.com/api/*"
  ],
  "commands": {
    "toggle-panel": {
      "suggested_key": {
        "default": "Alt+B"
      },
      "description": "Toggle BayScope Score Panel"
    },
    "open-keyword-scout": {
      "suggested_key": {
        "default": "Alt+K"
      },
      "description": "Open Keyword Scout"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "bayscope@bayscope.io",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "homepage_url": "https://tommsel.com/bayscope",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "BayScope",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.ebay.at/*",
        "*://*.ebay.be/*",
        "*://*.ebay.ca/*",
        "*://*.ebay.ch/*",
        "*://*.ebay.co.uk/*",
        "*://*.ebay.com.au/*",
        "*://*.ebay.com/*",
        "*://*.ebay.de/*",
        "*://*.ebay.es/*",
        "*://*.ebay.fr/*",
        "*://*.ebay.ie/*",
        "*://*.ebay.it/*",
        "*://*.ebay.nl/*",
        "*://*.ebay.pl/*"
      ],
      "run_at": "document_idle",
      "js": [
        "content-scripts/content.js"
      ]
    }
  ]
}