Examine source code of Marienkaefer_02

{
  "theme": {
    "images": {
      "theme_frame": "Marienkaefer_02.jpg"
    },
    "colors": {
      "frame": "#1d6b0c",
      "tab_background_text": "#f0eded"
    }
  },
  "version": "2.0",
  "name": "Marienkaefer_02",
  "manifest_version": 2
}