Examine source code of Ylilauta Adblock

{
  "manifest_version": 2,
  "name": "Ylilauta Adblock",
  "version": "1.2",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "activeTab",
    "*://ylilauta.org/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://ylilauta.org/*"
      ],
      "js": [
        "confirm-disabler.js"
      ],
      "run_at": "document_start"
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "applications": {
    "gecko": {
      "id": "document_start_script_executor@example.com"
    }
  }
}