But more fundamental: don't log in unless you have to, log in only in private browsing windows or separate browsers from your other surfing, and also clear your cookies often to keep your not-logged-in browsing cleaner from a privacy perspective.
also, responding to the (grand) parent, someone else mentioned that flash cookies are cross-browser. so if fb uses those you need to also make sure that the fb browser doesn't have flash installed.
The experimental webRequest API will solve that by providing a synchronous way for scripts to deny/allow connections before any requests are made, but webRequest won't be made available to non-experimental addons for a few months at the minimum.
More info: https://code.google.com/chrome/extensions/trunk/experimental...
The only downside is that it is sometimes a hassle on pages that integrate third-party payment solutions which often have a lot of redirects and off-site scripts and iframe content. But then, like in noScript, you can always allow all or some request types from a page permanently.
It's hard enough with noscript to randomly guess at what should be allowed for a given site. You take a guess, then slowly expand the number of temp permissions til the site eventually loads properly.