Examine source code of Spotbet

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Indian holidays",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(226, 214, 193, 0.19)",
      "toolbar_text": "rgb(242, 67, 13)",
      "frame": "rgb(233, 225, 214)",
      "tab_background_text": "rgb(255, 64, 28)",
      "toolbar_field": "rgba(180, 161, 135, 0.06)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(85, 240, 56)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(0, 0, 0)",
      "tab_loading": "rgb(85, 240, 56)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{18b0564c-619b-4cdc-bcd9-cb1063baffa3}"
    }
  }
}