Examine source code of X4FS v2.0

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "X4FS V 2.0",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right bottom"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(0, 0, 4)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(0, 0, 4)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(0, 0, 0)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(206, 22, 22)",
      "popup": "rgb(0, 0, 0)",
      "popup_text": "rgb(255, 255, 255)",
      "ntp_background": "rgb(0, 0, 0)",
      "popup_border": "rgb(6, 0, 0)",
      "sidebar_border": "rgb(0, 0, 0)",
      "sidebar": "rgb(25, 0, 0)",
      "toolbar_bottom_separator": "rgb(18, 1, 1)",
      "toolbar_field_separator": "rgb(7, 0, 0)",
      "toolbar_top_separator": "rgb(24, 0, 0)",
      "toolbar_vertical_separator": "rgb(17, 1, 1)",
      "tab_loading": "rgb(206, 22, 22)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{148eaffb-5522-4e5c-b624-7b8c956bc252}"
    }
  }
}