Examine source code of Purple Rain (Animated)

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Purple Rain (Animated)",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right bottom",
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(9, 24, 51)",
      "toolbar_text": "rgb(255, 128, 128)",
      "frame": "rgb(0, 11, 30)",
      "tab_background_text": "rgb(28, 220, 151)",
      "toolbar_field": "rgb(0, 11, 30)",
      "toolbar_field_text": "rgb(28, 220, 151)",
      "tab_line": "rgb(28, 220, 151)",
      "popup": "rgb(9, 24, 51)",
      "popup_text": "rgb(28, 220, 151)",
      "tab_loading": "rgb(28, 220, 151)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3c8a6567-9b86-4d08-bf6c-607503fce6f6}"
    }
  }
}