Examine source code of Spider and Grasshopper

{
  "theme": {
    "images": {
      "theme_frame": "SpiderGrasshopper_header.jpg"
    },
    "colors": {
      "frame": "#cfc6ac",
      "tab_background_text": "#cfc6ac"
    }
  },
  "version": "2.0",
  "name": "Spider and Grasshopper",
  "manifest_version": 2,
  "description": "A spider catches a grasshopper!"
}