Several months ago when I first tried Flock, I was pretty disappointed. The browser is buggy and even has bigger memory problem as Firefox. Not long after the installation, I uninstall it. And I never intended to try it one more time. Not even when it escaped the beta. A social browser just doesn’t get my attention.
This is somehow changed when I see the post in Techcrunch. According to the post:
Then came Flock 1.0. I’d never been a Flock fan before, always believing it to be nothing more than Firefox with plugins (Flock is based on the Firefox engine). Having watched the demo at TechCrunch 40 I downloaded the beta of Flock 1.0 and surfed away without incident. Some how the folks at Flock had tweaked the underlying Firefox engine to stop the memory issues.
So I give Flock another try. And yes, it seems to me that it is working better than Firefox. The previous post shows an image how much memory taken by Flock compared to Firefox.

Great work Flock team. Sadly I won’t still use your social features. I certainly will use Firefox more often if the solution can be implemented in Firefox, but I guess it will just be a dream since Firefox’s memory leak is a feature.