The FileZilla FTP client is adding support for a master password that will act as a key for storing FTP login credentials in an encrypted format. Users have been requesting this feature for a decade, since 2007, and they have asked it many and many times since then. The feature is scheduled to arrive in 3.26.0, but you can use it now if you download the release candidate from here. To enable the feature, users must visit the Edit > Settings > Interface section and enable the master password.
Source: https://www.bleepingcomputer.com/news/software/filezilla-ftp-client-adds-support-for-master-password-that-encrypts-your-logins/