Examine source code of Korektor Spellchecker

{
  "manifest_version": 3,
  "browser_specific_settings": {
    "gecko": {
      "id": "korektor_spellchecker@ufal.mff.cuni.cz",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "websiteContent"
        ]
      }
    }
  },
  "name": "__MSG_app_name__",
  "description": "__MSG_app_desc__",
  "default_locale": "en",
  "version": "2.0.0",
  "homepage_url": "https://ufal.mff.cuni.cz/korektor",
  "icons": {
    "48": "korektor_48.png",
    "128": "korektor_128.png"
  },
  "permissions": [
    "activeTab",
    "contextMenus",
    "scripting"
  ],
  "host_permissions": [
    "https://lindat.mff.cuni.cz/"
  ],
  "minimum_chrome_version": "102",
  "background": {
    "scripts": [
      "korektor.js"
    ],
    "service_worker": "korektor.js"
  }
}