Examine source code of U.S. Cavalry

{
  "theme": {
    "images": {
      "theme_frame": "USCavalry.jpg"
    },
    "colors": {
      "frame": "#0eb9ed",
      "tab_background_text": "#e3f20c"
    }
  },
  "version": "2.0",
  "name": "U.S. Cavalry",
  "manifest_version": 2,
  "description": "I don't know who designed the Cavalry Skull."
}