The language packs to install. Available language codes can be found on the releases page: https://releases.mozilla.org/pub/firefox/releases/${version}/linux-x86_64/xpi/, replacing ${version} with the version of Firefox you have.
https://releases.mozilla.org/pub/firefox/releases/${version}/linux-x86_64/xpi/
${version}
list of string
[ ]
[ "en-GB" "de" ]
