Examine source code of POI pocket

{
  "name": "POI pocket",
  "description": "Create new POI in www.poipocket.com. Select text (address, GPS coordinates...),right click and choose Create POI.",
  "version": "0.2resigned1",
  "manifest_version": 2,
  "icons": {
    "48": "icons/ico48.png",
    "128": "icons/ico128.png"
  },
  "background": {
    "persistent": true,
    "scripts": [
      "bg.js"
    ]
  },
  "permissions": [
    "contextMenus"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "jid1-annADLgIRCmP7Q@jetpack"
    }
  }
}