Examine source code of johnny-valo-L 2

{
  "theme": {
    "images": {
      "theme_frame": "3.jpg"
    },
    "colors": {
      "frame": "#4c3499",
      "tab_background_text": "#59177a"
    }
  },
  "version": "2.0",
  "name": "johnny-valo-L 2",
  "manifest_version": 2,
  "description": "2 versuch... 1 ging daneben"
}