Examine source code of Filmorias_addon

{
  "manifest_version": 2,
  "name": "Filmorias",
  "version": "1.4resigned1",
  "description": "Remove adfly link, and redirect to the video!",
  "content_scripts": [
    {
      "matches": [
        "https://www.sorozat-barat.club/*"
      ],
      "js": [
        "filmorias.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{50a4469a-c6b2-420d-8504-9dc0dbfac349}"
    }
  }
}