FireFTP is a free, open-source and cross-platform FTP client that facilitates quick data transfers between the local computer and FTP-server. It featuring a double-sided interface for easy file management. FTP servers can store large files and folders remotely for allowing you to access them from any computer, regardless of your location. To do so, you might need a dedicated FTP client. FTP client for Mozilla Firefox in the form of an add-on. It supports FTP, FTPS, and SFTP.
FireFTP is a charity ware and runs on platforms that Firefox supports. Its layout is similar to that of WS FTP. It is no longer compatible with Firefox 57 (Quantum) and later.
Cross-platform: Works on Windows, Mac OS X, Linux
Secure: SSL/TLS/SFTP support, same encryption used with online banking and shopping
Synchronization: Keep directories in sync while navigating