Examine source code of Asuna (Fire Effect) Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Asuna (Fire Effect) Theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(98, 6, 3, 0.62)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(8, 11, 33)",
      "tab_background_text": "rgb(232, 228, 227)",
      "toolbar_field": "rgb(136, 15, 15)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(245, 0, 0)",
      "popup": "rgb(82, 11, 11)",
      "popup_text": "rgb(215, 226, 239)",
      "tab_loading": "rgb(245, 0, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{824be69a-fddf-4c01-adfc-bcaa4b0090c9}"
    }
  }
}