Examine source code of Green Grass Jazz

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Green Grass Jazz",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-031-9570e8d1f7a5f835c92e764693337f43.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(219, 220, 219)",
      "toolbar_text": "rgb(87, 120, 33)",
      "frame": "rgb(201, 197, 197)",
      "tab_background_text": "rgb(87, 120, 33)",
      "toolbar_field": "rgba(223, 226, 218, 0.7)",
      "toolbar_field_text": "rgb(53, 82, 8)",
      "tab_line": "rgb(163, 255, 0)",
      "popup": "rgb(219, 220, 219)",
      "popup_text": "rgb(87, 120, 33)",
      "button_background_active": "rgb(87, 120, 33)",
      "button_background_hover": "rgb(178, 212, 122)",
      "icons": "rgb(132, 188, 41)",
      "ntp_background": "rgb(219, 220, 219)",
      "ntp_text": "rgb(53, 82, 8)",
      "popup_border": "rgb(163, 255, 0)",
      "popup_highlight_text": "rgb(163, 255, 0)",
      "popup_highlight": "rgb(87, 120, 33)",
      "sidebar_border": "rgb(163, 255, 0)",
      "sidebar_highlight_text": "rgb(87, 120, 33)",
      "tab_background_separator": "rgb(163, 255, 0)",
      "tab_selected": "rgb(202, 223, 164)",
      "tab_text": "rgb(87, 120, 33)",
      "toolbar_bottom_separator": "rgb(87, 120, 33)",
      "toolbar_field_border_focus": "rgb(163, 255, 0)",
      "toolbar_field_border": "rgb(53, 82, 8)",
      "toolbar_field_focus": "rgb(219, 220, 219)",
      "toolbar_field_highlight_text": "rgb(163, 255, 0)",
      "toolbar_field_highlight": "rgb(87, 120, 33)",
      "toolbar_field_separator": "rgb(53, 82, 8)",
      "toolbar_field_text_focus": "rgb(87, 120, 33)",
      "toolbar_top_separator": "rgb(53, 82, 8)",
      "tab_loading": "rgb(163, 255, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b4343c4c-ced8-4885-8bdd-245600b79e89}"
    }
  }
}