Rated 1 out of 5 stars
Excellent addon, but it no longer works.
Tried installing it today on Thunderbird 68.4.1. The addon installs but when adding a gmail account you get the error:
"Sign in with Google temporarily disabled for this app. This app has not been verified yet by Google in order to use Google Sign In."
I submitted gContactSync for verification several months ago. They claim it takes 4-6 weeks but it's been twice that. Unfortunately there's nothing I can do at this point...