Review for Provider for Google Calendar by kwade00
Rated 5 out of 5 stars
For those who think this is obsolete: No it isn't. It has significantly more capabilities then the built-in provider. I switched today because of errors and am unable to view several calendars. Delegated/shared calendars, for example, don't show up. And you can apparently have only one Contacts calendar, which means I have to choose only one of my three Google accounts for that. Not sure why Mozilla can't do as good a job as this developer did.
This review is for a previous version of the add-on (91.0.4).To create your own collections, you must have a Mozilla Add-ons account.