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.
Mozilla is changing the license used for the Firefox executable/binary. The TOS will be the governing license over Firefox, the branded browser executable. It will no longer be open source, as defined by the Open Source Initiative, as users are no longer free to use the software however they want. Firefox will now be source available.
The source code for the browser, is (at least as of this comment) FOSS under the MPL2 license. People are free to recompile the browser under a different name (e.g. Librewolf, Waterfox, etc.).
This is not FUD. I read through the new TOS, Acceptable Use Policy, and Privacy Policy. Since the browser executable was governed under the MPL2, there was little concern from the open source community. I made my judgement from those documents alone.