Examine source code of Snail's House Alien Pop

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Alien Pop",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center",
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(225, 234, 239, 0)",
      "toolbar_text": "rgb(230, 255, 230)",
      "frame": "rgb(142, 179, 201)",
      "tab_background_text": "rgb(230, 255, 230)",
      "toolbar_field": "rgba(15, 49, 79, 0.95)",
      "toolbar_field_text": "rgb(219, 219, 255)",
      "tab_line": "rgb(200, 119, 255)",
      "popup": "rgb(25, 61, 89)",
      "popup_text": "rgb(230, 255, 230)",
      "button_background_active": "rgba(111, 198, 255, 0.5)",
      "button_background_hover": "rgba(203, 255, 218, 0.5)",
      "ntp_background": "rgb(26, 35, 63)",
      "popup_border": "rgba(200, 119, 255, 0.5)",
      "popup_highlight": "rgb(80, 124, 158)",
      "toolbar_bottom_separator": "rgba(0, 172, 255, 0.25)",
      "toolbar_field_border_focus": "rgb(200, 119, 255)",
      "toolbar_field_highlight_text": "rgb(230, 255, 230)",
      "toolbar_field_highlight": "rgb(200, 119, 255)",
      "toolbar_field_text_focus": "rgb(230, 255, 230)",
      "toolbar_top_separator": "rgba(255, 255, 255, 0)",
      "tab_loading": "rgb(200, 119, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{96a5697f-84a6-422f-be9b-e85bc1e5b174}"
    }
  }
}