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CloseReview for Provider for Google Calendar by cgp0
Rated 5 out of 5 stars
Also tried fix offered by ohmjohn on November 20, 2014 (below), (deleted the agenda, password) and then re-creating it in thunderbird/lightning. Great solution !
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.