Rated 5 out of 5 stars

Great extension. I use it to synchronize 8 calendars on two different Google accounts. However I have experienced one issue recently. On one Google account, I have added a read-only calendar and used a Google function which is to add a default alarm to all these events. With that, all events on this read-only calendar have a 3-hour alarm.
Both on Google Calendar itself and on my phone (using Business Agenda on Android), I can dismiss those alarms without problems. However, on Thunderbird, I can't. Is there a solution?
Right now, I made a work-around: I imported twice the same calendar in Google and have set alarms on only one of these. I use the one with alarms on my phone and the one without on Thunderbird. Not the most elegant solution.

BTW, I have Thunderbird 53B1 with integrated Lightning on Windows and Provider... v. 3.3.

This review is for a previous version of the add-on (3.3).  This user has a previous review of this add-on.

This is a limitation in Lightning, but there are bugs filed to fix it. I hope to get to it soon!