Please welcome a one-port-to-rule-them-all localization pack
for *firefox browser. It installs most popular languages by
default (zh-CN de fr ja ru it es-ES), but you can tune it by
setting FIREFOX_I18N in your /etc/make.conf to any other of
supported locales or to "all" to install them all.
It depends on xpi-locale-switcher extension by default, which
makes it very easy to switch between locales (Tools->Languages).
Define WITHOUT_SWITCHER to avoid the dependency.
Approved by: krion (mentor)