Examine source code of Itachi Uchiha Theme Dark

{
  "name": "Itachi Uchiha Theme Dark",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "HD-wallpaper-itachi-uchiha-anime-flame-itachi-moon-red-uchiha-thumbnail(1)(1).png"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(0, 0, 0, 0)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{bb5b9799-cf42-4332-8e5e-9f5f9ceadd34}"
    }
  }
}