Rated 3 out of 5 stars

Unable to dismiss past events. As a workaround, I have to open the web calendar and dismiss it. There is a git issue opened for this.

Rated 1 out of 5 stars

Unreliable, has hardly ever worked for me.

Rated 3 out of 5 stars

Thanks for your add on. It works when Thunderbird just start or add a event on Thunderbird, it will sync into google calendar. However, it can't syn from google calendar back to Thunderbird. I believe something wrong in the write function. If I turn off the display the missing calendar, some event can't dismiss.

Rated 2 out of 5 stars

Seems useful, but very unreliable.
Changes on google calendar side causes it to go into a loop, either force the local changes back into google calendar, or you stay in the infinite loop (you click discard, and it keeps popping up making thunderbird unusable).

Rated 2 out of 5 stars

As many others have mentioned, this extension no longer syncs unless you restart Thunderbird. It's a shame because it used to be great. I don't know what's going on with the developer, but either this problem is out of his hands or he is no longer updating the extension. Either way, it's a shame.

Rated 5 out of 5 stars

has been working perfectly, always reliable.
216k users cannot be wrong!

Rated 3 out of 5 stars

So useful, but so unreliable.
Synchronization is made sometimes, for some items. A calendar has to be reliable. This is not the case with this add-on. And it is really a pity :(

Rated 2 out of 5 stars

Sync only occurs when restarting Thunderbird. Manually sync also does not work.
Thunderbird Supernova version 115.7.0 (64-bits), add-on version 115.0.2.
As a workaround I use the "Open Google Calendar" add-on (opens Google Calendar in a new tab).

Rated 3 out of 5 stars

only restart of thunderbird sync calendar. TB 115.5.2 addon version 115.0.2

Rated 3 out of 5 stars

Synchronization with Google Calendar ands Tasks only happens when I restart Thunderbird.

Thunderbird version 115.5.2, add-on version 115.0.2

Rated 2 out of 5 stars

Warning: Accepting/editing the event or dismissing reminder WILL REMOVE ATTENDEES!!! They'll receive a "Cancel" notification. Please fix that as soon as possible!

Rated 5 out of 5 stars

It works very well with TB 115.5.2(64b).
Big thanks to Philipp

Rated 1 out of 5 stars

I don't understand why we need an add-on so that Thunderbird can connect to Google Calendar, are there no in house engineers at Thunderbird to perform Google Calendar connection so that simply Thunderbird can show Google Calendar with any add-ons??

Rated 1 out of 5 stars

Respectfully, the current state of the plugin renders it unusable.

It started out ok, but a as time went on, I started to get more and more notifications from my meagre set of events.

Today, I spent ~10 minutes dodging focus-stealing notifications to get to the Thunderbird addon manager to disable the extension.

It's nice to have the calendar sidebar in Thunderbird, but I'll have to do without.

Thunderbird 115.4.3

Rated 5 out of 5 stars

No longer needed by me, but very many thanks to the developer who has tried, and mostly succeeded, to keep track of changing applications and APIs for many years.
Hats off to Philipp!

This user has a previous review of this add-on.

Rated 1 out of 5 stars

Attention! This AddOn works NOT with 115.4.x
Thunderbird freeze after intallig this AddOn.
And Thunderbird freeze after restart.
It's ahorrible AddOn. !

Rated 3 out of 5 stars

use to work great now it doesn't synch
need to be updated

Rated 1 out of 5 stars

Syncing the calendar unfortunately no longer works reliably. It only works when I manually restart Thunderbird.

Rated 2 out of 5 stars

Outgoing works fine but incoming doesn't. Now I either have to shut down and restart TB - or reinstall Provider for Google Calendar so it'll sync. But then it syncs only for a short period. Please fix this?! Version 115.4.1

Rated 5 out of 5 stars

Not perfect, but no other good and free solution.