Examine source code of Katzenbande

{
  "name": "Katzenbande",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Catline.png"
    },
    "colors": {
      "frame": "rgba(247, 244, 244, 0.98)",
      "tab_background_text": "rgba(168, 9, 9, 1)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "toolbar_field": "rgba(0, 0, 0, 0)"
    }
  }
}