The pkg-descr file for the mozilla port states that it is still officially in pre-release. With the release of version 1.0, this would appear to be no longer true. The sentence goes on to say, "the browser is mostly stable". Someone more familiar with Mozilla would need to evaluate this part of the statement to determine whether it needs to be updated.
Responsible Changed From-To: freebsd-ports->gnome over to maintainer
State Changed From-To: open->closed Fixed, thanks for reporting.