Luv Lightning Rated 5 out of 5 stars

I hope it will work with google calendar again soon. I created a new CalDav calendar with google's ICAL address - instructions were a big vague. Since it currently doesn't work in Tbird 24 + Lightning 2.6 I can't even test it. More info here:
https://blog.mozilla.org/calendar/2013/09/google-is-changing-the-location-url-of-their-caldav-calendars

This review is for a previous version of the add-on (2.6.2).