Examine source code of Simple Aero

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Simple Aero",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(255, 255, 255, 0)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(255, 255, 255)",
      "tab_background_text": "rgb(203, 203, 203)",
      "toolbar_field": "rgba(255, 255, 255, 0.37)",
      "toolbar_field_text": "rgb(179, 200, 255)",
      "tab_line": "rgb(210, 232, 253)",
      "popup": "rgba(12, 65, 130, 0.82)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_active": "rgb(45, 113, 198)",
      "button_background_hover": "rgb(12, 65, 130)",
      "icons_attention": "rgb(45, 113, 198)",
      "ntp_background": "rgb(4, 33, 70)",
      "tab_background_separator": "rgb(0, 0, 0)",
      "tab_loading": "rgb(0, 0, 0)",
      "tab_selected": "rgba(255, 255, 255, 0.3)",
      "toolbar_field_focus": "rgba(4, 33, 70, 0.82)",
      "toolbar_top_separator": "rgba(210, 232, 253, 0.22)",
      "toolbar_vertical_separator": "rgba(210, 232, 253, 0.18)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5dd5e477-76e1-4316-8ae8-383eaf56049e}"
    }
  }
}