A must have feature for TB instead of having separate Sunbird App Noté 4 sur 5 étoiles

It seems that Mozilla and its users are going toward merging the calendar system to Thunderbird. This addon is their main effort for achieving this.
It can easily sync with Google Calendar and other web calendars by default. But there're still some works remaining like the ability to sync Lightning tasks with Google tasks.

Cette critique concerne une version précédente du module (1.9).