Examine source code of Ghostfish

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Ghostfish",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg",
        "images/1.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center",
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(14, 39, 79)",
      "toolbar_text": "rgb(58, 221, 244)",
      "frame": "rgb(14, 39, 79)",
      "tab_background_text": "rgb(58, 221, 244)",
      "toolbar_field": "rgb(46, 81, 111)",
      "toolbar_field_text": "rgb(58, 221, 244)",
      "tab_line": "rgb(52, 158, 179)",
      "popup": "rgb(7, 50, 84)",
      "popup_text": "rgb(58, 221, 244)",
      "popup_border": "rgb(58, 221, 244)",
      "tab_loading": "rgb(52, 158, 179)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{617b3259-a698-48ff-bbb7-077c626f9a09}"
    }
  }
}