FireFTP – Firefox Add-on
FireFTP is a free, secure, cross-platform FTP client for Mozilla Firefox which provides easy and intuitive access to FTP servers.Along with transferring your files quickly and efficiently, FireFTP also includes more advanced features such as: directory comparison, syncing directories while navigating, SFTP, SSL encryption, search/filtering, integrity checks, remote editing, drag & drop, file hashing, and much more!
Download FireFTP from here
i gave it a chance despite the fact that i prefer cli over gui. The extension works fast and fine.
Thx for sharing the hint.