Examine source code of Deltarune Fountain theme

{
  "manifest_version": 2,
  "version": "1.1",
  "name": "Deltarune Fountain",
  "theme": {
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(6, 25, 39)",
      "toolbar_text": "rgb(0, 239, 253)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(2, 136, 144)",
      "toolbar_field": "rgb(0, 0, 0)",
      "toolbar_field_text": "rgb(0, 239, 253)",
      "tab_line": "rgb(0, 239, 253)",
      "popup": "rgba(6, 25, 39, 0.94)",
      "popup_text": "rgb(0, 239, 253)",
      "icons": "rgb(0, 237, 255)",
      "popup_border": "rgb(0, 239, 253)",
      "tab_loading": "rgb(0, 239, 253)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c15da10b-6d9f-471f-bc3f-6ba4f6523a1d}"
    }
  }
}