NOTE: This article applies only to Firefox versions previous to 1.5.
There is a bug in Firefox that if you try to access an FTP site that doesn't allow anonymous logins, you receive an error message (530 Login Incorrect) instead of being prompted to enter a username and password like IE does. This bug is fixed in Firefox 1.5.
For versions prior to 1.5, you can access these sites by entering the following in the address bar: ftp://username:firstname.lastname@example.org (replace username, password, and example.com with the appropriate values).
Alternatively, you may simply enter ftp://email@example.com, and you will be prompted for a password.