enable Do-Not-Track DNT by default
Tor Browser users all share the same browser profile and settings. If anyone enables DNT by themselves they make fingerprinting easier.
Tor users want privacy and anonymity. It is a statement, opinion and a behavior.
Do Not Track does not provide any more privacy - it is simply a statement. So why not state DNT?
The more users use DNT, the more the big companies will know what is up. Who they already fu**ed up, and who uses DNT.
You can make a change. Activate DNT by default. If it is activated in the next Torbrowser version for everyone by default, there is no disadvantage for anyone. It's just a statement. And all users will agree on the DNT privacy statement.