# pkg install firefox firefox-i18n
firefox-i18n contains localizations and is optional
First install Linux binary compatibility.
Note: For some reason flashplayer cannot be installed via pkg, but the port works.
# pkg install nspluginwrapper # cd /usr/ports/www/flashplayer # make install clean
Run as target (regular) user:
> nspluginwrapper -v -a -i
And that's it.