In the past version 2016 of KeyDepot, you were able to directly open a new website and copy username and password. There will be an extension for Firefox and Google Chrome in the future. With those extension, you can login automatically by just using your browser with the according extension.
Until those extensions are available, you can still use the old mechanism which you already know from KeyDepot 2016. You can find this functionality in the manager.
After clicking the marked icon, the website will be launched in your default browser. A second window gets opened, which allows you to easily copy your username and password.