Examine source code of Glass Frog

{
  "theme": {
    "images": {
      "theme_frame": "glassfrog.png"
    },
    "colors": {
      "frame": "#3333ff",
      "tab_background_text": "#66ff99"
    }
  },
  "version": "2.0",
  "name": "Glass Frog",
  "manifest_version": 2,
  "description": "Rare Glass Frog on uncluttered solid black background."
}