Examine source code of The Batman | Comic Theme

{
  "manifest_version": 2,
  "version": "3.0",
  "name": "The Batman  Comic Theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 0, 0, 0)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(25, 0, 0, 0.1)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(255, 0, 0)",
      "popup": "rgb(25, 0, 0)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_hover": "rgba(108, 23, 23, 0.25)",
      "icons": "rgb(255, 255, 255)",
      "ntp_text": "rgba(255, 255, 255, 0.35)",
      "popup_border": "rgba(150, 20, 20, 0.3)",
      "sidebar_border": "rgba(150, 20, 20, 0.3)",
      "sidebar_highlight": "rgb(100, 20, 20)",
      "sidebar": "rgb(25, 0, 0)",
      "tab_selected": "rgba(135, 43, 43, 0.25)",
      "toolbar_bottom_separator": "rgba(255, 0, 0, 0.1)",
      "toolbar_field_border": "rgb(255, 0, 0)",
      "toolbar_field_highlight": "rgb(145, 20, 20)",
      "toolbar_top_separator": "rgba(255, 0, 0, 0.1)",
      "tab_loading": "rgb(255, 0, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4ed664f6-25a5-496f-96de-2c926e68bb11}"
    }
  }
}