Examine source code of Blue Pool Water

{
  "theme": {
    "images": {
      "theme_frame": "header.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "Blue Pool Water",
  "manifest_version": 2,
  "description": "Remember that day you went in the pool and you looked at the surface and said, \"I want that on my Firefox,\" but you forgot your camera? Now, you can see that pool water on your Firefox for the whole summer!"
}