please I need help

when I try to update firefox and gnome I have this error I search google but there no solution please help me ? this is the error message "bind installed with PORT_REPLACES_BASE_BIND causes build problems" ?
Why would it install BIND? It's not a dependency of GNOME or Firefox.

I suspect you have dns/bind installed and are doing a portupgrade -a or something similar. Unless you actually use BIND just remove that package before proceeding.