Examine source code of winter is coming

{
  "name": "winter is coming",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Untitled design.png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(212, 212, 212, 0)",
      "bookmark_text": "rgba(8, 8, 8, 1)",
      "toolbar_field": "rgba(199, 199, 199, 1)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{bcc49cef-27ab-46ae-8785-ab7b6c74d8de}"
    }
  }
}