Examine source code of Starfield Constellation

{
  "manifest_version": 2,
  "version": "1.2",
  "name": "Starfield Constellation V1.2",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.png",
        "images/2.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left top",
        "right top",
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(219, 221, 221, 0.52)",
      "toolbar_text": "rgb(88, 90, 90)",
      "frame": "rgb(219, 221, 221)",
      "tab_background_text": "rgb(144, 146, 146)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(144, 146, 146)",
      "tab_line": "rgb(214, 167, 77)",
      "popup": "rgb(242, 242, 242)",
      "popup_text": "rgb(88, 90, 90)",
      "button_background_active": "rgb(144, 146, 146)",
      "button_background_hover": "rgb(242, 242, 242)",
      "icons_attention": "rgb(189, 20, 61)",
      "icons": "rgb(189, 20, 61)",
      "ntp_background": "rgb(219, 221, 221)",
      "ntp_text": "rgb(211, 88, 57)",
      "popup_border": "rgb(211, 88, 57)",
      "popup_highlight_text": "rgb(219, 221, 221)",
      "popup_highlight": "rgb(211, 88, 57)",
      "tab_background_separator": "rgb(214, 147, 77)",
      "tab_loading": "rgb(145, 255, 0)",
      "tab_selected": "rgb(242, 242, 242)",
      "tab_text": "rgb(51, 75, 121)",
      "toolbar_bottom_separator": "rgb(189, 20, 61)",
      "toolbar_field_border": "rgb(211, 88, 57)",
      "toolbar_field_focus": "rgba(219, 221, 221, 0.52)",
      "toolbar_field_text_focus": "rgb(51, 75, 121)",
      "toolbar_top_separator": "rgb(214, 167, 77)",
      "toolbar_vertical_separator": "rgb(189, 20, 61)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e5204b00-9a3b-4eca-96a4-938375d86360}"
    }
  }
}