Examine source code of Serene Fantasy

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Serene Fantasy",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-019-7ce748211c61f9059493d4c4378e8a74.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(173, 175, 211)",
      "toolbar_text": "rgb(94, 96, 144)",
      "frame": "rgb(94, 96, 144)",
      "tab_background_text": "rgb(224, 214, 186)",
      "toolbar_field": "rgb(220, 197, 224)",
      "toolbar_field_text": "rgb(106, 109, 173)",
      "tab_line": "rgb(224, 214, 186)",
      "popup": "rgb(220, 197, 224)",
      "popup_text": "rgb(94, 96, 144)",
      "button_background_active": "rgba(220, 197, 224, 0.57)",
      "button_background_hover": "rgba(220, 197, 224, 0.57)",
      "icons": "rgb(224, 214, 186)",
      "popup_border": "rgb(173, 175, 211)",
      "tab_selected": "rgba(224, 197, 223, 0.88)",
      "tab_loading": "rgb(224, 214, 186)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7b43ccad-9f59-4c03-a4a8-5be239db63f7}"
    }
  }
}