Examine source code of Sunset Night Sky

{
  "manifest_version": 2,
  "version": "0.0.1",
  "name": "Sunset Night Sky",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(32, 68, 120)",
      "toolbar_text": "rgb(245, 157, 101)",
      "frame": "rgb(6, 5, 21)",
      "tab_background_text": "rgb(245, 157, 101)",
      "toolbar_field": "rgb(153, 163, 195)",
      "toolbar_field_text": "rgb(32, 68, 120)",
      "tab_line": "rgb(171, 55, 67)",
      "popup": "rgb(153, 163, 195)",
      "popup_text": "rgb(6, 5, 21)",
      "tab_loading": "rgb(171, 55, 67)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{24c98f1c-3fcc-468d-8eab-b37a3e6dbd18}"
    }
  }
}