Examine source code of Spitzweg

{
  "name": "Spitzweg",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Maler.jpg"
    },
    "colors": {
      "frame": "rgba(39, 222, 3, 1)",
      "tab_background_text": "rgba(117, 13, 9, 1)",
      "bookmark_text": "rgba(245, 171, 225, 1)",
      "toolbar_field": "rgba(245, 171, 225, 1)",
      "toolbar_field_text": "rgba(117, 13, 9, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{806ca1b3-98ff-455f-8c97-6eb2b9d46ffa}"
    }
  }
}