TYPO3 extension extensionmanager The Extension Manager is the backend module for viewing and managing extensions. Repository:https://github.com/typo3/typo3 Issues:https://forge.typo3.org/ Read online:https://docs.typo3.org/permalink/t3coreapi:extension-management Packagist:https://packagist.org/packages/typo3/cms-extensionmanager