I don’t understand how they are supposed to “sell your data” if you just never use a Mozilla account and uncheck all the telemetry. Its not like they can secretly steal your data, since its Open Source.
It seems to me like just more FUD that Google is spreading to undermine our trust in free software.
If this translation feature is a problem, they should argue with those countries that it’s not a sale.
If they can’t do that, then maybe sacrifice the translation feature to safeguard user rights.
It seems like they are looking for any excuse to allow selling data eventually.