Examine source code of Bubble disco

{
  "theme": {
    "images": {
      "theme_frame": "disco-header.jpg"
    },
    "colors": {
      "frame": "#d9bdbd",
      "tab_background_text": "#d9bdbd"
    }
  },
  "version": "2.0",
  "name": "Bubble disco",
  "manifest_version": 2,
  "description": "Frack effect."
}