Examine source code of Demon Slayer : Zenitsu 2

{
  "name": "Demon Slayer : Zenitsu 2",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "cropped-2000-200-1054250.png"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 0.2)",
      "tab_background_text": "rgba(232, 232, 232, 1)",
      "toolbar": "rgba(0, 0, 0, 0.3)",
      "bookmark_text": "rgba(189, 189, 189, 1)",
      "toolbar_field": "rgba(117, 117, 117, 1)",
      "toolbar_field_text": "rgba(189, 189, 189, 1)"
    }
  }
}