Examine source code of Pennsylvania Fall

{
  "theme": {
    "images": {
      "theme_frame": "Fallleaves.JPG"
    },
    "colors": {
      "frame": "#0c330b",
      "tab_background_text": "#0d0b0b"
    }
  },
  "version": "2.0",
  "name": "Pennsylvania Fall",
  "manifest_version": 2,
  "description": "Leaves changing in early Fall, Pennsylvania"
}