Examine source code of Red Rune Secrets

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Red Rune Secrets",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(239, 225, 225, 0.22)",
      "toolbar_text": "rgb(254, 54, 94)",
      "frame": "rgb(248, 112, 140)",
      "tab_background_text": "rgb(248, 112, 140)",
      "toolbar_field": "rgba(248, 112, 140, 0.18)",
      "toolbar_field_text": "rgb(254, 54, 94)",
      "tab_line": "rgb(248, 112, 140)",
      "popup": "rgba(248, 112, 140, 0.2)",
      "popup_text": "rgb(0, 0, 0)",
      "ntp_text": "rgba(248, 112, 140, 0)",
      "sidebar_border": "rgb(253, 253, 253)",
      "sidebar_highlight": "rgb(205, 205, 205)",
      "sidebar": "rgb(254, 54, 94)",
      "tab_background_separator": "rgba(248, 112, 140, 0.18)",
      "tab_loading": "rgb(248, 112, 140)"
    }
  }
}