To install the extension

1. Log in the FTP, and then go to Magento 2 root folder (generally present under the public_html folder).
2. Create a new folder named code under the app folder; under code folder, create a folder named Ced.
   • Upload or Drag and Drop app/code/Ced/Mlibre directory.
   • After successfully uploading the directory, the extension will be installed/upgraded.
   • Now run the  following upgrade command in cmd 
     php bin/magento setup:upgrade.