Examine source code of Christmas Mice

{
  "theme": {
    "images": {
      "theme_frame": "header562.jpg"
    },
    "colors": {
      "frame": "#dbd8d8",
      "tab_background_text": "#9dfd99"
    }
  },
  "version": "2.0",
  "name": "Christmas Mice",
  "manifest_version": 2,
  "description": "Christmas mice celebrating the holidays."
}