Examine source code of Filek.TV

{
  "name": "Filek.TV",
  "description": "Wtyczka informacyjna kanału Filek.TV",
  "version": "1.0.1",
  "manifest_version": 2,
  "icons": {
    "19": "icon19.png",
    "48": "icon48.png"
  },
  "applications": {
    "gecko": {
      "id": "marcin.filek@gmail.com"
    }
  },
  "browser_action": {
    "default_icon": "icon19.png",
    "default_popup": "popup.html"
  },
  "permissions": [
    "activeTab"
  ]
}