Review for Provider for Google Calendar by PeterLairo
Rated 3 out of 5 stars
This add-on fulfills an import role for anyone who wants to be able to write to their Google Calendar from within Lightning.
Unfortunately, once you're done creating your calendars, and then de-select "check for new calendars", and you then add another Google Calendar you want to write to, there seems no way get the dialog back that upgrades the new calendar for write access.
Perhaps the add-on should not self-activate on Thunderbird load (it's annoying and unintuitive once you calendars are upgraded), but rather either activate when a new Google calendar is created, or when initiated by the user (via add-on Options or a right-click on a Calendar).
To create your own collections, you must have a Mozilla Add-ons account.