Examine source code of PirateFox

{
  "manifest_version": 2,
  "version": "1.1",
  "name": "PirateFox",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right bottom",
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(110, 110, 115, 0.48)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(140, 140, 140)",
      "toolbar_field": "rgba(28, 28, 29, 0.46)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(255, 138, 0)",
      "popup": "rgb(51, 52, 52)",
      "popup_text": "rgb(222, 226, 226)",
      "toolbar_field_border_focus": "rgb(157, 81, 0)",
      "toolbar_field_highlight": "rgba(179, 87, 0, 0.72)",
      "tab_loading": "rgb(255, 138, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f7e91c8f-8d7b-427e-b4ee-cd919a55447f}"
    }
  }
}