Examine source code of Summer Owl

{
  "theme": {
    "images": {
      "theme_frame": "treeowlfinal.jpg"
    },
    "colors": {
      "frame": "#f573f1",
      "tab_background_text": "#59a7de"
    }
  },
  "version": "2.0",
  "name": "Summer Owl",
  "manifest_version": 2,
  "description": "Owl next to tree and flowers"
}