www/firefox problems with gtk3 option

[Alejandro Estay]

hi, I send you this mail to ask about a problem. When I build firefox with
GTK3 option(in the meantime i running it with gtk2 option), it build
successfully, but at run-time, has serious stability problems and several
plugins are not working(flash, libreoffice, icedtea). I'm using gnome 3 and
FreeBSD10.1 RELEASE r275612, on a 8gb ram, core i7 3930k based computer,
and well configured X.org server.
it's mine problem or this option is buggy/broken?

greetings