FireFTP is a free, secure, cross-platform FTP/SFTP client for Mozilla Firefox which provides easy and intuitive access to FTP/SFTP servers. After 13 years and 25 million downloads later, Firefox has officially removed FireFTP and FireSSH support from the browser.

Features. It's free!; 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; Directory Comparison: Compare directory content (compares subdirectories too!); International: Available in over 20 languages; …

To install FireFTP, go to https://addons.mozilla.org/en-US/firefox/addon/fireftp and click on the 'Download FireFTP' link on the main page. You need to let the page finish loading in order to click the Install link (do not click on the Stop button).

FireFTP is the result. It's been no cake walk - developing for Mozilla is tough stuff, there's like a jazillion languages to learn to do it and I realized just how little school had prepared me for real world programming (thanks a freakin' lot, alma mater!)

Firefox has dropped support for FireFTP and FireSSH. I recommend using Waterfox to continue using the addons. Over the years the money went to an orphanage, LGBT rights, domestic violence support, planting trees, and bikes for the disabled.