Examine source code of hanz birthdays

{
  "theme": {
    "images": {
      "theme_frame": "DSCN0005.png"
    },
    "colors": {
      "frame": "#341291",
      "tab_background_text": "#057a8c"
    }
  },
  "version": "2.0",
  "name": "hanz birthdays",
  "manifest_version": 2,
  "description": "happy birthdays"
}