Examine source code of Improved Astolfo Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Astolfo best setup",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(255, 255, 255, 0)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(255, 226, 254)",
      "tab_background_text": "rgb(0, 0, 0)",
      "toolbar_field": "rgb(255, 226, 254)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(255, 226, 254)",
      "popup": "rgb(255, 226, 254)",
      "popup_text": "rgb(0, 0, 0)",
      "button_background_hover": "rgb(255, 226, 254)",
      "icons": "rgb(0, 0, 0)",
      "ntp_background": "rgb(68, 68, 68)",
      "popup_border": "rgb(0, 0, 0)",
      "sidebar": "rgb(255, 226, 254)",
      "tab_background_separator": "rgb(255, 226, 254)",
      "tab_selected": "rgb(255, 226, 254)",
      "toolbar_field_separator": "rgba(110, 0, 255, 0)",
      "toolbar_field_text_focus": "rgb(0, 0, 0)",
      "toolbar_top_separator": "rgba(0, 0, 0, 0)",
      "toolbar_vertical_separator": "rgb(0, 0, 0)",
      "tab_loading": "rgb(255, 226, 254)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{fc5f6c51-1f6d-433b-b3ae-869f685d93ff}"
    }
  }
}