Examine source code of marooned

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "marooned",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-026-829b05416f823e170310e7c826ad1bec.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(99, 1, 27)",
      "toolbar_text": "rgb(248, 210, 220)",
      "frame": "rgb(99, 1, 27)",
      "tab_background_text": "rgb(248, 210, 220)",
      "toolbar_field": "rgba(0, 0, 0, 0.2)",
      "toolbar_field_text": "rgb(248, 210, 220)",
      "tab_line": "rgb(251, 131, 165)",
      "popup": "rgb(99, 1, 27)",
      "popup_text": "rgb(248, 210, 220)",
      "ntp_background": "rgb(33, 1, 10)",
      "popup_highlight": "rgb(99, 1, 27)",
      "sidebar": "rgb(99, 1, 27)",
      "tab_loading": "rgb(251, 131, 165)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8acbbce7-5683-41f6-a4f5-ad6a3c19eef8}"
    }
  }
}