If you use Thunderbird ver 78.3.2, gContactSync extension will not work anymore. To fetch Google Contacts into Thunderbird, use the CardBook extension.
Tag: thunderbird addon
How to install Thunderbird and Lightning Calendar in Fedora Linux
To install Thunderbird client, open a terminal window and enter the following command:$ sudo dnf install thunderbird <enter> To get the calendar working in Thunderbird, add the Lightning addon from Extensions in Thunderbird.
Synchronize Google Calendar with Thunderbird Lightning
To synchronize Google Calendar with Thunderbird Lightning, open Thunderbird and install an add-on named "Provider for Google Calendar" by Philipp Kewisch. Follow the instructions after the install to grant permissions to your Google Calendar and synchronize.