Examine source code of anime-scene

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "anime-girl",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(225, 234, 239, 0)",
      "toolbar_text": "rgba(7, 6, 6, 0.84)",
      "frame": "rgb(142, 179, 201)",
      "tab_background_text": "rgb(72, 70, 120)",
      "toolbar_field": "rgba(255, 255, 255, 0.27)",
      "toolbar_field_text": "rgb(255, 188, 219)",
      "tab_line": "rgb(248, 112, 140)",
      "popup": "rgb(69, 58, 109)",
      "popup_text": "rgb(255, 69, 119)",
      "tab_loading": "rgb(248, 112, 140)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b73a1d7b-e525-42f0-a33c-c8b1e32ece13}"
    }
  }
}