Examine source code of 2B NieR: Automata

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "2B NieR: Automata",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 0, 0, 0)",
      "toolbar_text": "rgb(252, 253, 255)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(190, 190, 202)",
      "toolbar_field": "rgba(184, 102, 102, 0)",
      "toolbar_field_text": "rgb(215, 210, 255)",
      "tab_line": "rgb(255, 255, 255)",
      "popup": "rgb(35, 27, 39)",
      "popup_text": "rgb(197, 197, 197)",
      "button_background_hover": "rgb(176, 171, 213)",
      "frame_inactive": "rgb(129, 124, 165)",
      "icons_attention": "rgb(194, 190, 230)",
      "icons": "rgb(237, 215, 234)",
      "ntp_background": "rgb(44, 31, 48)",
      "tab_loading": "rgb(220, 204, 219)",
      "toolbar_field_border": "rgba(220, 204, 219, 0.27)",
      "toolbar_field_focus": "rgba(35, 27, 39, 0)",
      "toolbar_field_highlight": "rgba(215, 210, 255, 0.37)",
      "toolbar_top_separator": "rgba(220, 204, 219, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7e1b3362-8141-4ce5-b787-4b461d501bb5}"
    }
  }
}