The Labels feature patch is currently under review. It's almost done. The build you found was a test build to look at performance issues before landing it in. See bug: http://bugzilla.mozilla.org/show_bug.cgi?id=81292
WDA wrote: > Is there anyone that would like to comment on the progress of the new > LABELS feature in Mozilla mail? I'm very excited about it and believe > that it is going to elevate the email/newgroups client into another > realm. > > Waiting patiently. >
