In the end Mozilla is simply going to go through with it and there's nothing we can do about it. Just like with the killing of the XUL plugins - the company simply didn't care about the outcry. I mean why would they? The amount of people that cares about stuff like 'customization' or 'privacy' is slim.
So we will toothlessly complain but then the changes will be shoved in our throats, because obviously why would one care what the non-targeted demographics whines about. And of course it will be framed as being 'for our own good' and half of the people complaining with just deal with it, just like the majority already does.
The good news is that the project remains open source. The upcoming XULpocalypse already was set to make the existing Firefox forks permanent, so those of us that care will be moving to one of these anyway. Presumably these will not contain telemetry code.
So we will toothlessly complain but then the changes will be shoved in our throats, because obviously why would one care what the non-targeted demographics whines about. And of course it will be framed as being 'for our own good' and half of the people complaining with just deal with it, just like the majority already does.