Port upgrade: www/firefox. Added GUI selection support

[jannisan at t-online.de]

Michael Johnson wrote:
> Adam Weinberger wrote:
>> I'm definitely not willing to consider a GTK1 switch.
>
> totally agree about not wanting gtk1.

That's a pity, because as far as I have tested several configurations,
the one with Gtk1 without XUL has been the most stable and fastest (even
faster than Xlib, no idea why) and a quite nice looking version.

Greetings
Jan