Examine source code of Weihnachtsbaum

{
  "manifest_version": 2,
  "version": "1.1",
  "name": "Weihnachtsbaum",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(252, 252, 180, 0)",
      "toolbar_text": "rgb(252, 252, 180)",
      "frame": "rgb(255, 255, 255)",
      "tab_background_text": "rgb(252, 252, 180)",
      "toolbar_field": "rgba(255, 255, 255, 0)",
      "toolbar_field_text": "rgb(252, 252, 180)",
      "tab_line": "rgb(252, 252, 180)",
      "popup": "rgb(43, 42, 51)",
      "popup_text": "rgb(252, 252, 180)",
      "icons": "rgb(252, 252, 180)",
      "toolbar_top_separator": "rgba(233, 30, 30, 0)",
      "tab_loading": "rgb(252, 252, 180)"
    }
  }
}