Rated 4 out of 5 stars

Excellent blocker, but there's no menu entry in either the stable or Beta versions so it's not possible to whitelist.

This review is for a previous version of the add-on (2.6.1). 

That's right, Bluhell is meant to be fast & lightweight blocker, and as such it doesn't provides additional options which would make it work slower.

Btw, there are no "beta" versions of Bluhell, be careful installing versions outside of AMO. If there is such a version out there i will appreciate if you point it to me so that i can download and analyze what it does to warn other users.