Review for Provider for Google Calendar by Garret Wilson
Rated 2 out of 5 stars
If I enable the birthday calendar with the new 1.0.1/1.0.2 version, Thunderbird freezes for five seconds every time I change the week or change the view or anything in the calendar, making it essentially unusable. But the new version apparently conflicts with ThunderBirthday, which was working fine.
This review is for a previous version of the add-on (1.0.2).To create your own collections, you must have a Mozilla Add-ons account.