Examine source code of Beemo Dancing (Animated)

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Beemo Dancing (Animated)",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top",
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(94, 67, 180, 0.15)",
      "toolbar_text": "rgb(224, 35, 35)",
      "frame": "rgb(107, 82, 190)",
      "tab_background_text": "rgb(107, 82, 190)",
      "toolbar_field": "rgb(107, 82, 190)",
      "toolbar_field_text": "rgb(202, 232, 100)",
      "tab_line": "rgb(202, 232, 100)",
      "popup": "rgb(107, 82, 190)",
      "popup_text": "rgb(202, 232, 100)",
      "tab_loading": "rgb(202, 232, 100)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{fe80ae5b-866f-44dd-8baa-a267cc7ae63f}"
    }
  }
}