Examine source code of Sunshine

{
  "theme": {
    "images": {
      "theme_frame": "headersun.jpg"
    },
    "colors": {
      "frame": "#c70e0e",
      "tab_background_text": "#786060"
    }
  },
  "version": "2.0",
  "name": "Sunshine",
  "manifest_version": 2,
  "description": "You need the SUN to explore"
}