Developer reply by Josh Geenen
Rated 2 out of 5 stars
Not clear whether the bogus nobody@nowhere.invalid emails addresses are added to our Google account. These are my phone contacts! I don't need a bunch of junk messing up 100's of contacts. Too much work to risk it. I loved this addon before. Too bad.
This review is for a previous version of the add-on (0.3.3).These e-mail addresses are only stored locally in Thunderbird to work around mailing list bugs/assumptions in Thunderbird. They will never get propagated to your Google contacts.
To create your own collections, you must have a Mozilla Add-ons account.