Examine source code of sunsetting night

{
  "theme": {
    "images": {
      "theme_frame": "persona1.jpg"
    },
    "colors": {
      "frame": "#db6b2e",
      "tab_background_text": "#00145e"
    }
  },
  "version": "2.0",
  "name": "sunsetting night",
  "manifest_version": 2,
  "description": "sunset from the grand canyon"
}