Examine source code of lain blue

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "lain blue",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(138, 172, 199, 0.29)",
      "toolbar_text": "rgb(89, 115, 204)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(78, 97, 170)",
      "toolbar_field": "rgba(0, 8, 23, 0.42)",
      "toolbar_field_text": "rgb(66, 128, 158)",
      "tab_line": "rgb(30, 42, 83)",
      "popup": "rgb(19, 46, 70)",
      "popup_text": "rgb(126, 154, 255)",
      "tab_loading": "rgb(30, 42, 83)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6f92491a-1b63-4f84-91f6-30b57db123ac}"
    }
  }
}