Yeah, why would I go through all the effort to block advertising, tracking, and other ways of monitoring what I'm doing and then after all of that, use Chrome? I don't try to hide myself from Facebook then make a post about it on my friend's wall...
Chromium doesn't have any disadvantages in terms of privacy and security compared to Firefox and other open-source browsers. In fact, it has much more focus on security including a robust sandbox implementation and features like JIT hardening. Can you elaborate on the point you're trying to make?
HTTPSB is for Chromium, but I expect it to work on most Chromium-based browsers (Chrome, Opera, Yandex, Maxthon, etc.)
Edit: I personally block domains in global rules which are rather ubiquitous: `google.com`, `twitter.com`, `facebook.com`, `linkedin.com`, `gravatar.com`, etc. I enable these narrowly using scopes only when on a related web sites. I am pretty confident this cripples severely the ability of these ubiquitous servers to track me, regardless of the browser used.