Examine source code of Soft Autumn Trees

{
  "manifest_version": 2,
  "version": "1.1",
  "name": "Soft Autumn Trees",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(39, 29, 27)",
      "toolbar_text": "rgb(255, 181, 157)",
      "frame": "rgb(39, 29, 27)",
      "tab_background_text": "rgb(255, 181, 157)",
      "toolbar_field": "rgb(50, 40, 37)",
      "toolbar_field_text": "rgb(255, 181, 157)",
      "tab_line": "rgba(57, 48, 5, 0.1)",
      "popup": "rgb(35, 25, 23)",
      "popup_text": "rgb(255, 181, 157)",
      "button_background_hover": "rgb(50, 40, 37)",
      "ntp_background": "rgb(39, 29, 27)",
      "ntp_text": "rgb(255, 181, 157)",
      "popup_border": "rgba(255, 181, 157, 0.01)",
      "sidebar_border": "rgb(39, 29, 27)",
      "sidebar_highlight_text": "rgb(74, 62, 6)",
      "sidebar_highlight": "rgb(74, 62, 6)",
      "sidebar_text": "rgb(255, 181, 157)",
      "sidebar": "rgb(39, 29, 27)",
      "tab_background_separator": "rgb(39, 29, 27)",
      "tab_loading": "rgb(214, 198, 141)",
      "tab_selected": "rgb(57, 48, 5)",
      "tab_text": "rgb(214, 198, 141)",
      "toolbar_bottom_separator": "rgb(57, 48, 5)",
      "toolbar_field_highlight_text": "rgb(214, 198, 141)",
      "toolbar_field_highlight": "rgb(74, 62, 6)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{02840ea4-eab9-4bf5-a74d-569fe2167bb0}"
    }
  }
}