That is what it means, yes. And click them on as needed, first local scripts, and then various external ones if that's not enough.
Can be a bit of a hassle for a while, but once you get permanent rulesets established for sites you frequent and more or less trust, it works like a dream. I hardly ever see an ad, and various sniffer-services (or "analytics") must somehow learn to live without a lot my traffic data.