Examine source code of Shadow hedgehog

{
  "theme": {
    "images": {
      "theme_frame": "shade.jpg"
    },
    "colors": {
      "frame": "#9c9c9c",
      "tab_background_text": "#877d7d"
    }
  },
  "version": "2.0",
  "name": "Shadow hedgehog",
  "manifest_version": 2,
  "description": "My crack at my fav hedgehog"
}