Sigh. I just contradicted myself in another thread.
Likely not a good idea to use TBB because using TB over clearnet will make you close to pseudonymous. Therefore, TB fingerprint protection won’t help. In this situation, Firefox + addons is better than TB because even though you will get a unique fingerprint, you can alter (somewhat randomly) your fingerprint intentionally. TB will always have a consistent fingerprint.
Not sure if there’s any sense in my babbling… Maybe for small anonymity sets it’s better to strive for pseudonymity independence rather than cling to tenuous anonymity…