Examine source code of Jupiter Sky

{
  "theme": {
    "images": {
      "theme_frame": "jupiterheader.jpg"
    },
    "colors": {
      "frame": "#e35c3d",
      "tab_background_text": "#e68859"
    }
  },
  "version": "2.0",
  "name": "Jupiter Sky",
  "manifest_version": 2,
  "description": "An image of Jupiter with a starry background."
}