FireFTP is a free, open source, cross-platform FTP client for Mozilla Firefox in the form of an add-on. It supports FTP, FTPS, and SFTP. FireFTP is charityware and runs on platforms that Firefox supports.
FireFTP is activated from the Tools menu, opening a two-pane view within a Firefox window. The pane on the left-hand side shows the local file system, a tree of directories and a list of files in the current directory. The pane on the right shows the remote FTP server. Between the panes there are two buttons with arrows, one for upload and the other for download.
To connect to an FTP server, one can either enter a site name directly (“QuickConnect”) or use the Account Manager to make FireFTP remember settings about that particular site, including the username and password, security settings (encryption schemes), passive mode, initial directories to change to upon connection, and case changes to be performed in file names after transmissions.