Review for Provider for Google Calendar by tvadpro
Rated 4 out of 5 stars
Works nicely except for two glitches:
1. Inviting others to tasks/events is not allowed. Check-box that should enable this is grayed out and cannot be activated.
2. Incoming invites are added automatically to the calendar, regardless of whether you accept or decline.
Can't complain much, though -- this is a great add-on, and I'd be lost without it.
To create your own collections, you must have a Mozilla Add-ons account.