Examine source code of american bulldog

{
  "theme": {
    "images": {
      "theme_frame": "skin.jpg"
    },
    "colors": {
      "frame": "#e6ed0c",
      "tab_background_text": "#f21f1f"
    }
  },
  "version": "2.0",
  "name": "american bulldog",
  "manifest_version": 2,
  "description": "American bulldog"
}