Examine source code of Peeking Tree Frog

{
  "theme": {
    "images": {
      "theme_frame": "tree_frog_firefox4.jpg"
    },
    "colors": {
      "frame": "#94c97b",
      "tab_background_text": "#3b542c"
    }
  },
  "version": "2.0",
  "name": "Peeking Tree Frog",
  "manifest_version": 2,
  "description": "Gray Tree Frog"
}