Examine source code of crater

{
  "theme": {
    "images": {
      "theme_frame": "Crater_Lake__Winter_by_MarcAdamus.jpg"
    },
    "colors": {
      "frame": "#de1d1d",
      "tab_background_text": "#7ee4e6"
    }
  },
  "version": "2.0",
  "name": "crater",
  "manifest_version": 2,
  "description": "crater nieve"
}