Examine source code of Treetops

{
  "theme": {
    "images": {
      "theme_frame": "TreetopsH.jpg"
    },
    "colors": {
      "frame": "#ebf700",
      "tab_background_text": "#ebf700"
    }
  },
  "version": "2.0",
  "name": "Treetops",
  "manifest_version": 2,
  "description": "A photo I took this spring."
}