Rated 5 out of 5 stars

Quick, easy, and works perfectly. Excellent add on!
Note: You may have to change one setting in your google admin.google.com settings. Simply go into your admin page and search "search and assistant settings" and make sure you have "access to workspace data through assistant" set to "On".

Thank you for your feedback.

I have added your tip to the description of this add-on and, naturally, credited you for it.

For your information, I have created a different add-on that should display the tasks for Google Workspace users even if the Assistant setting is not enabled: https://addons.thunderbird.net/thunderbird/addon/open-google-tasks-default/