Examine source code of Abstrakt Treppe

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Abstrakt Treppe",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(255, 253, 254, 0.01)",
      "toolbar_text": "rgb(254, 214, 1)",
      "frame": "rgb(136, 136, 136)",
      "tab_background_text": "rgb(249, 255, 1)",
      "toolbar_field": "rgb(244, 253, 250)",
      "toolbar_field_text": "rgb(60, 130, 54)",
      "tab_line": "rgb(119, 248, 112)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(98, 102, 183)",
      "tab_loading": "rgb(119, 248, 112)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1af91b77-3e9f-439c-a9a0-7ace88ab5b6c}"
    }
  }
}