Examine source code of Dark Mystic

{
  "name": "Dark Mystic",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "black-blue-red-cubism.png"
    },
    "colors": {
      "frame": "rgba(13, 38, 97, 1)",
      "tab_background_text": "rgba(255, 0, 0, 0.66)",
      "toolbar": "rgba(0, 0, 0, 0.13)",
      "bookmark_text": "rgba(255, 77, 0, 1)",
      "toolbar_field": "rgba(0, 0, 0, 0.57)",
      "toolbar_field_text": "rgba(255, 77, 0, 1)",
      "tab_line": "rgba(255, 85, 0, 0.62)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{43e58f42-0b9b-4973-8726-cbf99cc42434}"
    }
  }
}