Examine source code of MozMeets

{
  "manifest_version": 2,
  "name": "MozMeets",
  "version": "1.4resigned1",
  "description": "Shows meetup events for Mozilla",
  "permissions": [
    "*://api.meetup.com/*",
    "*://graph.facebook.com/*"
  ],
  "applications": {
    "gecko": {
      "id": "{d4eeccf3-e8c5-4618-a396-eb337d18fadb}"
    }
  },
  "browser_action": {
    "default_title": "MozMeets",
    "default_popup": "/popup/popup.html"
  }
}