Examine source code of winter wine

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "winter wine",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(86, 0, 19, 0.43)",
      "toolbar_text": "rgb(252, 242, 244)",
      "frame": "rgb(86, 0, 19)",
      "tab_background_text": "rgb(252, 242, 244)",
      "toolbar_field": "rgba(255, 255, 255, 0.74)",
      "toolbar_field_text": "rgb(86, 0, 19)",
      "tab_line": "rgb(86, 0, 19)",
      "popup": "rgb(252, 242, 244)",
      "popup_text": "rgba(86, 0, 19, 0.43)",
      "button_background_active": "rgb(131, 106, 255)",
      "button_background_hover": "rgb(255, 173, 217)",
      "frame_inactive": "rgb(255, 132, 197)",
      "icons_attention": "rgb(255, 131, 198)",
      "icons": "rgb(255, 92, 179)",
      "ntp_background": "rgb(210, 46, 135)",
      "ntp_text": "rgb(255, 157, 210)",
      "popup_border": "rgb(255, 128, 197)",
      "popup_highlight_text": "rgb(255, 138, 200)",
      "popup_highlight": "rgb(255, 152, 208)",
      "sidebar_highlight_text": "rgb(255, 100, 184)",
      "sidebar_text": "rgb(255, 130, 198)",
      "tab_loading": "rgb(86, 0, 19)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3f57d46e-2f91-440a-a0db-9b14a948a06c}"
    }
  }
}