Examine source code of Digital Wireframe

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Digital Wireframe",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right bottom",
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(4, 4, 4, 0)",
      "toolbar_text": "rgb(142, 189, 0)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(142, 189, 0)",
      "toolbar_field": "rgb(0, 0, 0)",
      "toolbar_field_text": "rgb(142, 189, 0)",
      "tab_line": "rgb(142, 189, 0)",
      "popup": "rgb(0, 0, 0)",
      "popup_text": "rgb(142, 189, 0)",
      "button_background_active": "rgba(40, 57, 255, 0.85)",
      "button_background_hover": "rgba(40, 57, 255, 0.85)",
      "icons": "rgb(142, 189, 0)",
      "ntp_background": "rgb(0, 0, 0)",
      "popup_border": "rgb(142, 189, 0)",
      "popup_highlight_text": "rgb(142, 189, 0)",
      "popup_highlight": "rgba(40, 57, 255, 0.85)",
      "sidebar_border": "rgb(142, 189, 0)",
      "tab_background_separator": "rgb(142, 189, 0)",
      "tab_loading": "rgb(142, 189, 0)",
      "tab_text": "rgb(142, 189, 0)",
      "toolbar_bottom_separator": "rgb(142, 189, 0)",
      "toolbar_field_border_focus": "rgb(142, 189, 0)",
      "toolbar_field_border": "rgb(142, 189, 0)",
      "toolbar_field_highlight_text": "rgb(142, 189, 0)",
      "toolbar_field_highlight": "rgba(40, 57, 255, 0.85)",
      "toolbar_field_separator": "rgb(142, 189, 0)",
      "toolbar_field_text_focus": "rgb(142, 189, 0)",
      "toolbar_vertical_separator": "rgb(142, 189, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1b7c8b27-7f26-4acf-8c41-5d6ae0698366}"
    }
  }
}