Examine source code of Jadisco.pl

{
  "background": {
    "page": "background.html"
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/16.png",
      "32": "icons/32.png"
    },
    "default_popup": "popup.html"
  },
  "description": "Powiadamia o strumieniach Jadisco.pl.",
  "icons": {
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "manifest_version": 2,
  "name": "Jadisco.pl",
  "permissions": [
    "notifications"
  ],
  "version": "1.2.4.1",
  "browser_specific_settings": {
    "gecko": {
      "id": "{bbb0df11-b3d0-4423-8100-393ed4458ce3}"
    }
  }
}