Examine source code of Can I Fly There

{
  "manifest_version": 2,
  "name": "Can I Fly There",
  "version": "1.2.2",
  "description": "Utility for checking if you can fly to an FSEconomy airport using your simulator.",
  "icons": {
    "48": "icons/icon-48.png"
  },
  "permissions": [
    "storage",
    "downloads"
  ],
  "browser_action": {
    "default_icon": "icons/icon-32.png",
    "default_title": "Can I Fly There",
    "default_popup": "popup/popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://server.fseconomy.net/*"
      ],
      "js": [
        "content-script.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{146595fb-3723-4f5b-9e57-07c307af8128}",
      "strict_min_version": "48.0"
    }
  }
}