Examine source code of Lenker

{
  "manifest_version": 3,
  "name": "Lenker",
  "version": "1.4",
  "description": "Maakt het internet malser.",
  "author": "Jos Zuijderwijk",
  "icons": {
    "32": "img/icon-32.png",
    "128": "img/icon-128.png",
    "512": "img/icon-512.png"
  },
  "action": {
    "default_icon": "img/icon-128.png",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "dictionary.js",
        "findAndReplaceDOMText.js",
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{af88ceb9-8160-4474-a6a8-9e5c7609581f}"
    }
  },
  "permissions": [
    "storage"
  ]
}