Review for Google Contacts by Bill Johnson
Rated 1 out of 5 stars
Google Contacts created a loop that generated 25,000 (really!) duplicate contacts in my gmail account. Even after I shut down Thunderbird, the process continued and I had to go into the Task Manager and kill the thunderbird.exe process to get it to stop.
This review is for a previous version of the add-on (0.6.40).To create your own collections, you must have a Mozilla Add-ons account.