$ emerge -pqv '=www-client/firefox-153.0.1::gentoo'
[ebuild     U ] www-client/firefox-153.0.1 [147.0.1] USE="X dbus hardened hwaccel jack jpegxl* jumbo-build openh264 pgo pulseaudio sndio system-av1 system-harfbuzz system-icu system-jpeg system-libevent system-libvpx system-pipewire system-png system-webp wasm-sandbox wayland -clang -debug -eme-free -gmp-autoupdate -gnome-shell -libproxy (-selinux) -telemetry -test (-valgrind) -wifi" L10N="(-ach%) (-af%) (-an%) (-ar%) (-ast%) (-az%) (-be%) (-bg%) (-bn%) (-br%) (-bs%) (-ca%) (-ca-valencia%) (-cak%) (-cs%) (-cy%) (-da%) (-de%) (-dsb%) (-el%) (-en-CA%) (-en-GB%*) (-eo%) (-es-AR%) (-es-CL%) (-es-ES%) (-es-MX%) (-et%) (-eu%) (-fa%) (-ff%) (-fi%) (-fr%) (-fur%) (-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%*) (-sc%) (-sco%) (-si%) (-sk%) (-skr%) (-sl%) (-son%) (-sq%) (-sr%) (-sv%) (-szl%) (-ta%) (-te%) (-th%) (-tl%) (-tr%) (-trs%) (-uk%) (-ur%) (-uz%) (-vi%) (-xh%) (-zh-CN%*) (-zh-TW%*)" LLVM_SLOT="22%* -21* (-19%) (-20%)"