Examine source code of glacial dark

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "glacial",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-037-b73f9b34467ba541de861f5b4c0c6316.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(32, 40, 48)",
      "toolbar_text": "rgb(204, 221, 255)",
      "frame": "rgb(10, 15, 20)",
      "tab_background_text": "rgb(131, 138, 144)",
      "toolbar_field": "rgb(10, 23, 32)",
      "toolbar_field_text": "rgb(204, 221, 255)",
      "tab_line": "rgb(53, 136, 184)",
      "popup": "rgb(32, 40, 48)",
      "popup_text": "rgb(131, 138, 144)",
      "button_background_active": "rgb(22, 98, 77)",
      "button_background_hover": "rgba(22, 98, 77, 0.2)",
      "icons_attention": "rgb(48, 204, 160)",
      "ntp_background": "rgb(32, 40, 48)",
      "ntp_text": "rgb(204, 221, 255)",
      "popup_highlight_text": "rgb(221, 238, 255)",
      "popup_highlight": "rgb(16, 64, 128)",
      "sidebar_highlight_text": "rgb(221, 238, 255)",
      "sidebar_highlight": "rgb(16, 64, 128)",
      "tab_loading": "rgb(48, 204, 160)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e1b94bd4-5d46-4078-9bbf-a9702a93e6a1}"
    }
  }
}