Examine source code of Frog Pond

{
  "theme": {
    "images": {
      "theme_frame": "Frogpond.jpg"
    },
    "colors": {
      "frame": "#c6c6c6",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Frog Pond",
  "manifest_version": 2,
  "description": "Frog Pond. See the frog hanging on to the line. He is a tree frog not wanting to get his feet wet. ;)"
}