Examine source code of BIG CLOCK :]

{
  "name": "BIG CLOCK :]",
  "version": "1.5",
  "description": "legit e timer koito se resetva kato natisnesh Enter, za da se vkliuchi, cukash 'Tab', yes it is spaghetti code i know",
  "manifest_version": 3,
  "icons": {
    "16": "img.png",
    "48": "img.png",
    "128": "img.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://williamhill.virtuefusion.com/*",
        "https://paddypower.virtuefusion.com/"
      ],
      "js": [
        "contentScript.js"
      ],
      "run_at": "document_end"
    }
  ],
  "permissions": [
    "scripting",
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "flyerbek13@gmail.com"
    }
  }
}