This is because they are shipped in the same language pack, and matches how English languages are distributed for all other applications on the system (eg, language-pack-en-base, language-pack-gnome-en-base etc). Deviating from everything else on the system would require Firefox-specific workarounds in language-selector, so this is a wontfix
This is because they are shipped in the same language pack, and matches how English languages are distributed for all other applications on the system (eg, language- pack-en- base, language- pack-gnome- en-base etc). Deviating from everything else on the system would require Firefox-specific workarounds in language-selector, so this is a wontfix