I often see third-party FreeBSD desktop guides that include this:
# pkg install xorg xfce4 slim % echo "exec xfce4-session >> ~/.xinitrc"
Xfce remains my pragmatic favourite after all these years. But WindowMaker is also wonderful and nostalgic, and tiled window managers are for squares:
# pkg install windowmaker
The guides then advise you to configure these
moused_enable="YES" dbus_enable="YES" hald_enable="YES" slim_enable="YES"
This is all fine, but
moused isn’t necessary. From the manpage:
The moused utility and the console driver work together to support mouse operation in the text console and user programs.
Your mouse is almost certainly using the
xf86-input-mouse driver automatically, unless you don’t install the Xorg metapackage.