Examine source code of the last leaf

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#7d7c94",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "the last leaf",
  "manifest_version": 2,
  "description": "original picture: \"Hang in There\" by David C. Schulz on Fivehundredpx --- There is a mystery in simplicity, the complicated things have no mystery"
}