Review for Google Contacts by Veto Vetoed
Rated 3 out of 5 stars
Flawlessly transferred all my contacts from Thunderbird to Gmail on first install, but when it tried to sync with Gmail the next time I opened Thunderbird, only about half the contacts were imported. So, strangely, all the contacts I initially had in Thunderbird are now in Gmail, but only a subset of them are in Thunderbird.
This review is for a previous version of the add-on (0.2.70).To create your own collections, you must have a Mozilla Add-ons account.