Examine source code of Horse Shoes

{
  "theme": {
    "images": {
      "theme_frame": "Horse_Shoe_Header.jpg"
    },
    "colors": {
      "frame": "#ebdfdf",
      "tab_background_text": "#f5eded"
    }
  },
  "version": "2.0",
  "name": "Horse Shoes",
  "manifest_version": 2,
  "description": "Horse shoes across the screen"
}