Review for Provider for Google Calendar by Firefox user d290ea
Rated 5 out of 5 stars
Here, I got back to TB 60.9.0 (none of my add-on works with 68 version...) and extension to 4.4.2
it doesn't work (no connection to my G account), but with the JLJ_M tip, it works fine again.
To create your own collections, you must have a Mozilla Add-ons account.