Examine source code of Captain Spaceboy OMORI

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Capt. Spaceboy OMORI",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.png",
        "images/2.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top",
        "right top",
        "right bottom"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "no-repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(158, 117, 207)",
      "toolbar_text": "rgb(250, 198, 255)",
      "frame": "rgb(142, 179, 201)",
      "tab_background_text": "rgb(255, 224, 245)",
      "toolbar_field": "rgb(210, 221, 255)",
      "toolbar_field_text": "rgb(62, 67, 169)",
      "tab_line": "rgb(248, 112, 140)",
      "popup": "rgb(171, 255, 223)",
      "popup_text": "rgb(98, 102, 183)",
      "button_background_active": "rgb(96, 69, 204)",
      "button_background_hover": "rgb(133, 205, 222)",
      "frame_inactive": "rgb(65, 49, 139)",
      "icons_attention": "rgb(62, 142, 40)",
      "icons": "rgb(119, 23, 173)",
      "ntp_background": "rgb(176, 127, 214)",
      "ntp_text": "rgb(145, 10, 120)",
      "popup_border": "rgb(117, 244, 255)",
      "popup_highlight_text": "rgb(86, 53, 174)",
      "popup_highlight": "rgb(198, 255, 230)",
      "sidebar_border": "rgb(121, 82, 222)",
      "sidebar_highlight": "rgb(205, 99, 255)",
      "sidebar": "rgb(162, 255, 137)",
      "tab_background_separator": "rgb(86, 207, 156)",
      "tab_selected": "rgba(199, 78, 202, 0.57)",
      "tab_loading": "rgb(248, 112, 140)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c768bd83-fb2c-4dcd-827f-edb1a61368a1}"
    }
  }
}