Examine source code of intergalactic

{
  "theme": {
    "images": {
      "theme_frame": "top-starscopy.jpg"
    },
    "colors": {
      "frame": "#426aed",
      "tab_background_text": "#78a1ff"
    }
  },
  "version": "2.0",
  "name": "intergalactic",
  "manifest_version": 2,
  "description": "Stars by Labrot"
}