Examine source code of Nextcloud Explorer Open

{
  "manifest_version": 2,
  "name": "Nextcloud Explorer Open",
  "version": "0.3.1",
  "description": "Open the matching Nextcloud WebDAV folder in Windows Explorer.",
  "browser_specific_settings": {
    "gecko": {
      "id": "nextcloud-explorer-open@covasala.org",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "browsingActivity",
          "websiteActivity",
          "websiteContent"
        ]
      }
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "64": "icons/icon-64.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "menus",
    "nativeMessaging"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/index.php/apps/files/*",
        "*://*/*/index.php/apps/files/*",
        "*://*/apps/files/*",
        "*://*/*/apps/files/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  }
}