Examine source code of dark victorian wallpaper

{
  "theme": {
    "images": {
      "theme_frame": "persona.jpg"
    },
    "colors": {
      "frame": "#993300",
      "tab_background_text": "#993300"
    }
  },
  "version": "2.0",
  "name": "dark victorian wallpaper",
  "manifest_version": 2,
  "description": "dark wallpaper"
}