Examine source code of lidark

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "LiDark",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-026-829b05416f823e170310e7c826ad1bec.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(49, 54, 61, 0.61)",
      "toolbar_text": "rgb(252, 252, 252)",
      "frame": "rgb(35, 38, 41)",
      "tab_background_text": "rgb(189, 195, 199)",
      "toolbar_field": "rgb(49, 54, 59)",
      "toolbar_field_text": "rgb(239, 240, 241)",
      "tab_line": "rgb(61, 174, 233)",
      "popup": "rgba(49, 54, 59, 0.8)",
      "popup_text": "rgb(239, 240, 241)",
      "button_background_hover": "rgb(61, 174, 233)",
      "ntp_background": "rgb(49, 54, 59)",
      "popup_highlight": "rgba(61, 174, 233, 0.9)",
      "sidebar_highlight": "rgba(61, 174, 233, 0.9)",
      "sidebar": "rgb(49, 54, 59)",
      "tab_loading": "rgba(0, 171, 255, 0)",
      "tab_selected": "rgba(49, 54, 59, 0.8)",
      "toolbar_field_border_focus": "rgb(61, 174, 233)",
      "toolbar_field_border": "rgb(49, 54, 59)",
      "toolbar_top_separator": "rgba(0, 171, 255, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7412a564-f0fd-416f-a9b9-f530b0e5756f}"
    }
  }
}