Examine source code of † kuromi animated [2]

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "† kuromi animated two",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center",
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 0, 0, 0)",
      "toolbar_text": "rgb(255, 209, 229)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(223, 199, 255)",
      "toolbar_field": "rgb(0, 0, 0)",
      "toolbar_field_text": "rgb(223, 199, 255)",
      "tab_line": "rgb(223, 199, 255)",
      "popup": "rgb(0, 0, 0)",
      "popup_text": "rgb(223, 199, 255)",
      "tab_loading": "rgb(223, 199, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b30bdea8-6759-4c5b-b728-7cb75ddfbb05}"
    }
  }
}