Review for Google Contacts by HansSietsma
Rated 1 out of 5 stars
Hardly seems to work. Updates form both sides (Google and TB) don't reacht the other side of the ocean most of the time. Upredicatble behavior. Status bar reports 'XML-error'.
Potentially nice though, especially the option of choosing what to with Google Groups.
To create your own collections, you must have a Mozilla Add-ons account.