Examine source code of tree crown in winter

{
  "theme": {
    "images": {
      "theme_frame": "winter-tree-h.jpg"
    },
    "colors": {
      "frame": "#ed9907",
      "tab_background_text": "#eef20c"
    }
  },
  "version": "2.0",
  "name": "tree crown in winter",
  "manifest_version": 2,
  "description": "a tree crown covered with ice in a freezing sunny morning in Vrhnika, Slovenia"
}