Why is Fedora not a Free GNU/Linux distributions?

[Antonio Olivares]

> You were told about the problems earlier on too and you
> choose to ignore 
> it. CDDL was deliberately designed to be incompatible with
> GPL
> 
> http://lwn.net/Articles/198171/
> 
> -- 

In looking at the article and the incompatibilities, I have found a chart on 

http://en.wikipedia.org/wiki/List_of_FSF_approved_software_licenses

Q:  If MPL(Mozilla Public License) is incompatible with GPL, why is it distributed with many linux distributions some which call themselves GNU/Linux?  

Q:  Is this why Fedora not playing around with Firefox?

http://linux.derkeiler.com/Mailing-Lists/Fedora/2008-06/msg02165.html

http://fedoraproject.org/static/firefox/
http://fedoraproject.org/static/firefox/website-services-agreement.html

BTW,

I found a site which explains(fairly) about kernel modules and the GPL:

http://m.domaindlx.com/LinuxHelp/politics/kmodsGPL.htm

Pretty much it sumarizes that the modules that are not GPL are not illegal and there are many gray areas still present.  There are many places also on the internet like the Tivo argument between Linus Torvalds and one of the authors of the GPL Alexandre Oliva.  What is going to happen?  

Regards,

Antonio