Rated 5 out of 5 stars

I use this add-on for many of my google calendars.

Google is changing things on their side of the network making t difficult for the end users. NightHawk (kudos to you!), has found a workaround using the oath passwords saved within TB. follow his instructions and it will work. I use 10 different calendars within google.

Here is the instructions by NightHawk:

Open TB. You will get a popup for each Google Account associated with the calendars you have. Pay close attention to the account name and authorise only the first pop-up, then CLOSE the rest, and close TB again. Repeat this process for each Google Account until all are authorized

This review is for a previous version of the add-on (3.3).  This user has a previous review of this add-on.