Rated 3 out of 5 stars

Has served well over the years for the most part. I'v also run into issues recently though, being unable to add new calendars. In my case I removed the extension entirely and restarted TBird. On restart the extension force reinstalled itself and prompted for login credentials. Thankfully that fixed the issues I was having and I can now add calendars again. It's like an update did not go correctly at some point.

This review is for a previous version of the add-on (4.4.1).