some questions about mozilla

[Jonathan Wilson]

1.is netscape 6 based on the mozilla project?
Whats the relationship between ns6 and mozilla

and 2.what features does the netscape browser (version 6) have that
arent available in mozilla or arent available as source code?
Specificly, does mozilla include a java runtime as source? What about
the encryption/security related bits?
What other bits are missing from mozilla?
Also, why are the bits that are missing not available? (is it government
laws? liscence restrictions?)