I've noticed for some time now Firefox is downloading endless language source files, random example:
* firefox-102.10.0esr-sco.xpi BLAKE2B SHA512 size ;-) ... [ ok ] >>> Downloading 'http://mirror.bytemark.co.uk/gentoo/distfiles/34/ firefox-102.10.0esr-si.xpi' --2023-04-12 13:02:46-- http://mirror.bytemark.co.uk/gentoo/distfiles/34/ firefox-102.10.0esr-si.xpi Resolving mirror.bytemark.co.uk... 2001:41c8:20:5e6::150, 80.68.83.150 Connecting to mirror.bytemark.co.uk|2001:41c8:20:5e6::150|:80... connected. HTTP request sent, awaiting response... 200 OK Length: 585626 (572K) [application/x-xpinstall] Saving to: ‘/var/cache/distfiles/firefox-102.10.0esr-si.xpi.__download__’ /var/cache/distfiles/fir 100%[=================================>] 571.90K --.-KB/s in 0.09s However, my L10N flags look like this: [ebuild U ] www-client/firefox-102.10.0:esr::gentoo [102.9.0:esr::gentoo] USE="clang dbus gmp-autoupdate openh264 system-av1 system-harfbuzz system-icu system-jpeg system-libevent system-libvpx system-webp wayland -debug -eme-free -geckodriver -hardened -hwaccel -jack -libproxy -lto -pgo -pulseaudio - screencast (-selinux) -sndio -system-png (-system-python-libs) -wifi" L10N="en-GB -ach -af -an -ar -ast -az -be -bg -bn -br -bs -ca -ca-valencia - cak -cs -cy -da -de -dsb -el -en-CA -eo -es-AR -es-CL -es-ES -es-MX -et -eu - fa -ff -fi -fr -fy -ga -gd -gl -gn -gu -he -hi -hr -hsb -hu -hy -ia -id -is - it -ja -ka -kab -kk -km -kn -ko -lij -lt -lv -mk -mr -ms -my -nb -ne -nl -nn - oc -pa -pl -pt-BR -pt-PT -rm -ro -ru -sco -si -sk -sl -son -sq -sr -sv -szl - ta -te -th -tl -tr -trs -uk -ur -uz -vi -xh -zh-CN -zh-TW" 468,331 KiB Why are source files for unset language sources downloaded each time?