Examine source code of Restful Fox Dark Pro

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Restful Dark Pro",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(29, 29, 29, 0.5)",
      "toolbar_text": "rgb(168, 168, 255)",
      "frame": "rgb(43, 44, 49)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(140, 140, 244, 0.7)",
      "toolbar_field_text": "rgb(209, 209, 255)",
      "tab_line": "rgb(0, 0, 0)",
      "popup": "rgba(39, 39, 39, 0.9)",
      "popup_text": "rgb(98, 102, 183)",
      "ntp_background": "rgb(39, 39, 39)",
      "ntp_text": "rgb(233, 237, 240)",
      "popup_border": "rgb(0, 0, 0)",
      "tab_loading": "rgb(0, 0, 0)"
    }
  }
}