On Solaris 8, install JDK6u5 b10.
At the end of installation of JDK6u5 default desktop browser is not launched.
On Solaris 9 GNOME is part of the system. Gnome library (/usr/lib/libgnomevfs-2.so) can be found in /usr/lib. The underlying problem seems to be that the mozilla browser is not installed by default.