Review for Provider for Google Calendar by Stephan
Rated 5 out of 5 stars
There seems to be an issue when using "Provider for Google Calendar 1.0.2" together with "Exchange 2007/2010 Calendar and Tasks Provider 3.1.3".
If both are running I can't add a new google calendar (the google calendar selection tool and the 2-factor authorization dialog does not show). I could only get it to work by disabling the Exchange Provider, Restarting Thunderbird, Logging into my Google Calendar (now it works fine), enabling Exchange Provider again, Restarting again and login back into my exchange calendar.
To create your own collections, you must have a Mozilla Add-ons account.