Examine source code of Zwiermonnikoog

{
  "manifest_version": 2,
  "name": "Zwiermonnikoog",
  "version": "1.0",
  "description": "Usability fixes for Schiermonnikoog.com",
  "icons": {
    "48": "icons/zwiermonnikoog-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.schiermonnikoog.com/*"
      ],
      "js": [
        "zwiermonnikoog.js"
      ]
    }
  ]
}