Developer reply by Leni Mayo
Rated 1 out of 5 stars
It used to work, for the last few months every time I try to sync it wants to duplicate all contacts. I've given up.
red_nucleus, somehow the two sides have got out of sync. Hard to say how that happened but to get them back into sync, you've got to force a slow sync: http://zindus.com/i/slow-sync
To create your own collections, you must have a Mozilla Add-ons account.