Examine source code of Handsome Visitor

{
  "theme": {
    "images": {
      "theme_frame": "Visitor.jpg"
    },
    "colors": {
      "frame": "#1c1810",
      "tab_background_text": "#f8fcc2"
    }
  },
  "version": "2.0",
  "name": "Handsome Visitor",
  "manifest_version": 2,
  "description": "This handsome visitor was in our yard one fall day, and we luckily had a camera handy."
}