"Mozilla 0.6 is a milestone release based on the same branch
as Netscape 6. It is aimed at developers who wish to create
products that extend Netscape 6 or who wish to port it."
"For details on how to use these features, see What's New in
Netscape 6?, bearing in mind that Netscape 6 supports features that
Mozilla does not, including Netscape Instant Messenger and access
to AOL mail and Netscape WebMail, and so any information about any
of these Netscape 6-specific features won't do you any good in
Mozilla. Also, Netscape 6 does not include ChatZilla as Mozilla
does, and so you won't find any information on it in the What's New
in Netscape 6 guide."