Though it's not advertised on the landing page, Lightbeam has a block functionality: https://www.mozilla.org/en-US/lightbeam/

It's also endorsed by mozilla, which makes me trust it more. I've been using it for a while (on top of noscript) and it's quite informative and seems to work well.

My personal setup is noscript with careful whitelisting which I've found to effectively disable most tracking.