Examine source code of Mauer2

{
  "theme": {
    "images": {
      "theme_frame": "DSC00361Kopie_bearbeitet-12.jpg"
    },
    "colors": {
      "frame": "#1a4fd4",
      "tab_background_text": "#6f1f91"
    }
  },
  "version": "2.0",
  "name": "Mauer2",
  "manifest_version": 2,
  "description": "Mauer"
}