I just wish Privacy Badger didn't force DNT to be enabled. Not only does the entire concept mean trusting the advertising companies implicitly, the header serves to differentiate your traffic.
You're worried about browser fingerprinting? Does any Firefox extension effectively counter that?
From my understanding blocking 3rd party JS is largely insufficient for accomplishing this, regardless of DNT settings.
You may be right regardless that it's better to appear as much like a stock browser as possible, in terms of privacy settings, so DNT should stay disabled. But in practical terms it might not make of a difference.
I don't know of any tools to block fingerprinting, but here's a cool tool by the EFF for testing how unique your browser is: https://panopticlick.eff.org
Panopticlick is a best guess, only. If you use exactly the same system twice, it should detect that. However, browsers and systems autoupdate frequently, and various other things that are fingerprinted are also not really fixed.
For a single browser session; this should work. Over months, it's harder. A tracker would needs to at least be quite aggressive and collect a lot of information to track you, and then be fairly clever in fuzzily matching that in the future if they want to track you over time.
Which isn't to say that short-to-medium term tracking is just fine, but it's not black and white either.
Yes, canvasblocker blocks one kind of fingerprinting. Combined with ublock (or privacybadger) + self destructing cookies and maybe decentraleyes, and a vpn, you are almost there...
Simple blockers actually do a lot of good here - because many of the things that will fingerprint you are not first party sites but 3rd party ad scripts.
From my understanding blocking 3rd party JS is largely insufficient for accomplishing this, regardless of DNT settings.
You may be right regardless that it's better to appear as much like a stock browser as possible, in terms of privacy settings, so DNT should stay disabled. But in practical terms it might not make of a difference.