Examine source code of SHINee gif theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "SHINee beige theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(168, 160, 155)",
      "toolbar_text": "rgb(239, 233, 233)",
      "frame": "rgb(220, 212, 212)",
      "tab_background_text": "rgb(167, 169, 171)",
      "toolbar_field": "rgb(223, 216, 213)",
      "toolbar_field_text": "rgb(58, 58, 58)",
      "tab_line": "rgb(128, 129, 140)",
      "popup": "rgb(223, 216, 213)",
      "popup_text": "rgb(76, 73, 70)",
      "tab_loading": "rgb(128, 129, 140)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d50b8331-b9cc-4675-8884-5b51c7b7f3ec}"
    }
  }
}