Sounds like it. It's worth making the distinction between first party and third party cookies when blocking (most browsers will let you distinguish).
Broadly, if not infallibly, first-party cookies are set by the website you're using to make the experience smoother for the duration of your visit. Third-party cookies?can help when switching between related sites, but are more open to abuse. Like they say, any technology can be weaponized :-).
Different browsers use different terminology, but probably you're looking to block 'tracking', 'cross-site tracking' or 'third party' rather than all cookies. Firefox probably has the most fine-grained control at the moment.
Derek
Derek Milliner