Examine source code of Oda Nobunaga

{
  "name": "Oda Nobunaga",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "feeeeeeeeeee.png"
    },
    "colors": {
      "frame": "rgba(0, 9, 59, 1)",
      "tab_background_text": "rgba(224, 209, 0, 0.87)",
      "toolbar": "rgba(0, 0, 0, 0.41)",
      "bookmark_text": "rgba(176, 176, 176, 1)",
      "toolbar_field": "rgba(0, 0, 0, 0.59)",
      "toolbar_field_text": "rgba(186, 186, 186, 1)"
    }
  }
}