Review for Google Contacts by tcsmith
Rated 1 out of 5 stars
Does not work anymore. Google upgraded to OAuth2.0 and announced the change 2 years in advance. Google Contacts didn't stay current and won't work at all. I'll change my review when the issue is fixed. Appears the developer has abandoned the add-on which is a real shame since it worked great.
To create your own collections, you must have a Mozilla Add-ons account.