Examine source code of Password Filler

{
  "manifest_version": 3,
  "default_locale": "en",
  "name": "__MSG_extName__",
  "version": "1.3.0",
  "description": "__MSG_extDesc__",
  "browser_specific_settings": {
    "gecko": {
      "id": "passwordfiller@app",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "webRequest",
    "webRequestAuthProvider",
    "nativeMessaging",
    "alarms",
    "scripting",
    "storage"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_icon": {
      "16": "icons/toolbar-32.png",
      "32": "icons/toolbar-32.png"
    }
  },
  "icons": {
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  }
}