Examine source code of Wolfs Run

{
  "theme": {
    "images": {
      "theme_frame": "Gruppe67ee.jpg"
    },
    "colors": {
      "frame": "#678c91",
      "tab_background_text": "#ed2835"
    }
  },
  "version": "2.0",
  "name": "Wolfs Run",
  "manifest_version": 2
}