Examine source code of Night party

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Night party",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 0, 0, 0.5)",
      "toolbar_text": "rgb(255, 216, 135)",
      "frame": "rgb(51, 51, 51)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(205, 205, 205, 0.75)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(255, 167, 0)",
      "popup": "rgb(255, 234, 218)",
      "popup_text": "rgb(35, 35, 35)",
      "tab_loading": "rgb(255, 167, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{05011173-1d6f-4664-86b9-1fa8b8c29875}"
    }
  }
}