Examine source code of Pixel Tower

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Pixel Tower",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg",
        "images/1.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center",
        "left center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(31, 34, 61)",
      "toolbar_text": "rgb(245, 187, 204)",
      "frame": "rgb(16, 16, 26)",
      "tab_background_text": "rgb(109, 142, 180)",
      "toolbar_field": "rgb(25, 25, 33)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(162, 37, 74)",
      "popup": "rgb(26, 26, 41)",
      "popup_text": "rgb(255, 255, 255)",
      "popup_border": "rgb(0, 0, 0)",
      "sidebar_border": "rgb(83, 43, 56)",
      "sidebar_text": "rgb(245, 187, 204)",
      "sidebar": "rgb(26, 26, 41)",
      "tab_text": "rgb(245, 187, 204)",
      "toolbar_bottom_separator": "rgb(30, 27, 28)",
      "toolbar_field_border": "rgb(31, 34, 61)",
      "toolbar_top_separator": "rgb(31, 34, 61)",
      "tab_loading": "rgb(162, 37, 74)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8e647948-1ff5-42ab-91f0-436936ceac64}"
    }
  }
}