Examine source code of CRITICAL MASS

{
  "theme": {
    "images": {
      "theme_frame": "CriticalMassTheme.jpg"
    },
    "colors": {
      "frame": "#8c8c8c",
      "tab_background_text": "#f7f7f7"
    }
  },
  "version": "2.0",
  "name": "CRITICAL MASS",
  "manifest_version": 2,
  "description": "Based on the Picture \"Kritische Masse / Critical Mass\". Look at wwwschaulustde if you want to see more of my artworks."
}