Until approximately a month ago, I used Firefox. The extensions I made the most use of were all privacy related:
NoScript (duh)
Ghostery (allowed me to block the little niggling crap scripts allowed through from the first party domain with NoScript)
Self destructing cookies (whitelisting cookies, brilliant idea)
BetterPrivacy (dealt with flash cookies, though I think Firefox handles those itself now)
Scriptish (which is 99% scripts I make for my own use, like removing the sitenotice node here on Slashdot)
Then I switched to Chrome and got uMatrix, and felt like a complete pleb. It never quite dawns on you the kind of content amalgamation a simple webpage actually is until you have a comprehensive breakdown by subdomain of where every cookie, script, XML HTTP request, plugin, CSS file, image, etc. is all coming from. It even has built-in options to spoof your useragent and clear the browser cache on regular intervals, spoof referers, block hyperlink auditing, etc. Switch that bad-boy into what I call "hostile mode" (block everything that the user does not explicitly whitelist) and you feel like Gandalf.
uMatrix covers the function of Noscript and Ghostery very well, and I found an extension called Tab Cookie which covers the function of Self Destructing Cookies. Tampermonkey replaced Scriptish, though I've yet to find something with a similar function to BetterPrivacy. Hulu is one of the sites I frequent with a flash cookie whose existence is obvious (the volume level) and I've noticed it is not resetting between logins, so it must not be handled by TabCookie.