Examine source code of quetzal forest

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "quetzal forest",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(32, 69, 78)",
      "toolbar_text": "rgb(56, 110, 122)",
      "frame": "rgb(56, 110, 122)",
      "tab_background_text": "rgb(103, 155, 168)",
      "toolbar_field": "rgb(56, 110, 122)",
      "toolbar_field_text": "rgb(8, 27, 33)",
      "tab_line": "rgb(242, 102, 102)",
      "popup": "rgb(8, 27, 33)",
      "popup_text": "rgb(173, 250, 194)",
      "button_background_active": "rgb(242, 102, 102)",
      "button_background_hover": "rgb(6, 30, 34)",
      "icons_attention": "rgb(242, 62, 61)",
      "icons": "rgb(37, 153, 133)",
      "ntp_background": "rgb(32, 69, 78)",
      "ntp_text": "rgb(56, 110, 122)",
      "popup_border": "rgb(242, 62, 61)",
      "tab_background_separator": "rgb(255, 0, 4)",
      "tab_selected": "rgb(32, 69, 78)",
      "tab_text": "rgb(242, 62, 61)",
      "toolbar_bottom_separator": "rgb(32, 69, 78)",
      "toolbar_field_border": "rgb(81, 136, 149)",
      "toolbar_field_focus": "rgb(81, 136, 149)",
      "toolbar_field_highlight_text": "rgb(4, 3, 3)",
      "toolbar_field_highlight": "rgb(56, 110, 122)",
      "toolbar_field_text_focus": "rgb(32, 69, 78)",
      "toolbar_top_separator": "rgb(242, 102, 102)",
      "toolbar_vertical_separator": "rgb(255, 0, 4)",
      "tab_loading": "rgb(242, 102, 102)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9172061d-035a-46f9-88fd-88054e8edf38}"
    }
  }
}