Mozilla Connect

Ok, I've now also found "menu redesign" in the secret settings. I love these two settings!

I can see the setting in Nightly but not in Beta. The menu doesn't look as nice in Nightly, in Beta it was nicely organised.

How do I enable this? I just saw it for a while in beta and really liked it, but now it's gone from beta and I can't see it in nightly either. Thanks.