Review for Provider for Google Calendar by gmstone
Rated 3 out of 5 stars
seems to work great when syncing calendars, however, it also appears to slow down thunderbird and when typing an email or just maneuvering around, it seems to cause thunderbird to stall for a few seconds.
This review is for a previous version of the add-on (0.5.1).To create your own collections, you must have a Mozilla Add-ons account.