uBlock origin is a blocker/filter that is highly respected and greatly improves bandwidth, security, and privacy. I install it right away, even in TBB.
It is possible to install uBlock origin system-wide via apt-get
But tbb doesn't normally pick up system-wide addons.
Addons do not (directly) add to fingerprint (firefox does not reveal the count or existance of any addons).
If we find a way to make tbb detect system-wide addons, we'd be taking a stronger stance against ads/malware/malicious servers than the TPO. I'm comfortable with that and consider it an important help to our users.
Status -> Researching how to get TBB to detect system-wide addons