Examine source code of Visit From Santa

{
  "name": "Visit From Santa",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "VisitfromSantaHCustom.jpg"
    },
    "colors": {
      "frame": "rgba(206, 216, 224, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(203, 214, 222, 0)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(0, 0, 0, 0.1)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7e67d292-3abf-4648-b34e-d25a060eb0ca}"
    }
  }
}