Examine source code of Fall Leaves and Log

{
  "theme": {
    "images": {
      "theme_frame": "fallpersona.jpg"
    },
    "colors": {
      "frame": "#fcfcfc",
      "tab_background_text": "#f7f7f7"
    }
  },
  "version": "2.0",
  "name": "Fall Leaves and Log",
  "manifest_version": 2,
  "description": "Fall leaves"
}