Examine source code of white mushroom

{
  "theme": {
    "images": {
      "theme_frame": "mushroom.jpg"
    },
    "colors": {
      "frame": "#080808",
      "tab_background_text": "#ade809"
    }
  },
  "version": "2.0",
  "name": "white mushroom",
  "manifest_version": 2,
  "description": "cc"
}