Examine source code of supermassive

{
  "theme": {
    "images": {
      "theme_frame": "blackHolehead.jpg"
    },
    "colors": {
      "frame": "#ede1e1",
      "tab_background_text": "#e81010"
    }
  },
  "version": "2.0",
  "name": "supermassive",
  "manifest_version": 2,
  "description": "black hole\n....."
}