Examine source code of Browser du Magritte

{
  "theme": {
    "images": {
      "theme_frame": "ff_magritte_header.jpg"
    },
    "colors": {
      "frame": "#ffcc66",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Browser du Magritte",
  "manifest_version": 2,
  "description": "Based on Rene Magritte's \"The Treachery of Images.\""
}