Examine source code of Smarttec Astronaut

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Smarttec",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(9, 18, 32, 0.32)",
      "toolbar_text": "rgb(143, 150, 168)",
      "frame": "rgb(17, 33, 59)",
      "tab_background_text": "rgb(143, 150, 168)",
      "toolbar_field": "rgba(9, 18, 32, 0.32)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(183, 41, 38)",
      "popup": "rgb(9, 18, 32)",
      "popup_text": "rgb(143, 150, 168)",
      "tab_loading": "rgb(183, 41, 38)"
    }
  }
}