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.
“Never” has a very clear and definite meaning. By undoing “never,” I feel like the Mozilla foundation is inviting a class-action lawsuit.