It's usually around this time I plug Self Destructing Cookies (https://addons.mozilla.org/en-US/firefox/addon/self-destruct... ); it simply nukes any cookies that aren't whitelisted.

Edit: For Firefox

I'm using this tool from the Mac App Store: https://itunes.apple.com/us/app/cookie/id415585910?mt=12

The UI is pretty bad, but it seems to be doing its job.

> it simply nukes any cookies that aren't whitelisted.

Probably not what you want in case of e.g. Google.

I don't see why it would be any different in the case of Google; but I don't personally use the Google services to any greater extent these days, so perhaps I'm just not feeling the ramifications ordinary users would.

I actually use Firefox's private browsing feature for browsing untrusted websites. That combined with NoScript should keep me quite (but obviously not entirely) anonymous.