Not worth the trouble. Rated 1 out of 5 stars

Too many issues. Caldav works better than anything now anyway. Don't bother with addons. They aren't necessary anymore. Google how to make it work. It's stable and works flawlessly for both your personal calendars and shared. Tip: Simply add each calendars Caldav address and sign into your OWN account each calendar is shared with. VOILA! They all show up and sync without fanfare.

Since todays update 6-19-2017 Broken Can not send invites to email address any longer Rated 1 out of 5 stars

Since todays update you can not send an email invite to the person your are scheduling any longer, Not sure if it is a glitch but please take a look at it

displays callendars from other Google account Rated 3 out of 5 stars

I have two Google accounts. When trying to add callendars from first account TB shows me the list with callendars from second account. No way to choose from the callendars which I have in my first account, How come?
This is from +/- 2-3 weeks. Earlier I had added callendars properly from both accounts.


Ok, solved:
I had opposite situation as "okolle" wrote at May the 5th: I added my callendars writing e-mail instead my regular This caused that TB displayed the window with request to allow the access to Google callendars.

Seems earlier the window displayed itself but I was out of office during whole week. So I didn't confirm in this window. Probably TB understood I don't allow.

Is there any possibility to force the TB to change the decission? How to make the TB to display the dialog window with the request of access to Google callendars???
It is necessary for example in case when I want to change my decission - it is important for safety!

now doesnt work Rated 2 out of 5 stars

The regular google calendar is no longer displayed in the selection list,
Only the "other calendars" on the account. What's wrong here

Purpose? Rated 1 out of 5 stars

I fail to understand the need for this. Lightning already syncs with Google calendars. I've bee using Lightning for years and never needed this addon for Lightning to sync with Google calendars.

Very useful but a resource-hog Rated 3 out of 5 stars

I have a very long history of using this add, and then disabling it. It is very useful but it duplicates the resource usage of TB (for example, from about 0.1% CPU-155 MB Ram when syncing to more than 8% CPU-240 MB Ram). When starting TB at the beginning of the session CPU and RAM usage can peak until freezing for a while. Diminishing high-resource consumption will really improve the usability of the app.

Cannot Create Events or Tasks with TB 52.1.1 Rated 1 out of 5 stars

Super Annoying!! I have tried the workaround by Nighhawk and it does not work on this release. Should I downgrade TB???? So I can see the calendar but I cannot create or modify and events or tasks

Nitghawk workaround fit only for pure google account Rated 1 out of 5 stars

For a domain that use google interface whereby autentication is outside on a Shibboleth server, the authentication windows killed with no time to complete entering a word.

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

Working use work around by Nighthawk. Rated 5 out of 5 stars

I use this add-on for many of my google calendars.

Google is changing things on their side of the network making t difficult for the end users. NightHawk (kudos to you!), has found a workaround using the oath passwords saved within TB. follow his instructions and it will work. I use 10 different calendars within google.

Here is the instructions by NightHawk:

Open TB. You will get a popup for each Google Account associated with the calendars you have. Pay close attention to the account name and authorise only the first pop-up, then CLOSE the rest, and close TB again. Repeat this process for each Google Account until all are authorized

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

Solved the login problems - everything is working again Rated 4 out of 5 stars

For me it stopped working as well, as is the case for many users from around the end of april.

I tried the solution from Nighthawk from April the 27th, didn't work, then I tried the solution from Salvador Pérez from the 7th of May, which didn't work either.

What I finally did was to first remove the OAuth token as Salvador Pérez suggested, then, after opening TB, the Google Login window would popup but not present the login form but instead the warning, that I need to enable cookies. If you see that error as well, then go to TB -> Preferences -> Preferences -> Privacy, under "Web Content" enable "Accept cookies from sites" and change the "Accept third-party cookies" dropdown to "Never".

Then quit TB, start it again and you should be presented with Google's login form. Just enter your credentials and it should work then. For me at least, it did.

I'm running TB 45.8.0 on Linux Mint 16.0 (Ubuntu 14.04.1), Plugin version is 3.3.

It works again Rated 5 out of 5 stars

I was stuck in the google's login window (when I pushed the Next button nothing happened). I tried the workaround from Nighthawk, yet no change. However, my last resource was to go to:

Add-ons Manager -> Extensions -> Provider for Google Calendar (More) -> Home page (follow the link) -> Add to Thunderbird button.

This reinstalled the plugin and then I was able to complete the google's login process again for all my accounts.

I hope this comment helps somebody.

Not Usable Any Longer Rated 2 out of 5 stars

Worked great for years till the latest update and made me miss 2 appts which cost me money. Just going to rely on the Windows calendar from now on unless this fixes itself.

Bug since update Rated 4 out of 5 stars

I was using 'Provide for Google Calendar' some years now without any issue. But today suddenly it stopped to sync three calendars of one of my two Google accounts. I couldn't change, delete or create new events via Lightning any more. When checking the Google account in Lightning in the small dialog window where a Google account can be selected this add-on seemed not to be able to contact this particular Google account. My other account still works fine. Since the account which stopped working was using still the old nomenclature 'googlemail' I tried to go for 'gmail' for the same account. Surprisingly after having put in the same account but just by using gmail instaed of googlemail everything was fine and the three calendars of this account are working as before.

I cannot add events to Google Calendar either Rated 5 out of 5 stars

I've exactly the same problem than Tom Leonard. I can syncing to receive events, but i cannot send to Google Calendar from Thunderbird with lightning.

As mentioned by Snow99, the Workaround to TB Update 52.0.1 by Nighthawk published on April 27, 2017, WORKS! THANKS to both you.

Latest update stops tasks syncing? Rated 4 out of 5 stars

Have enjoyed using this in conjunction with google tasks sync but following latest update I cannot add tasks to my google calendar and am presented with a message asking me to select a calendar that supports tasks - which of course mine does. Frustrated user now, not sure how to get beyond this...............

can't send or receive events Rated 4 out of 5 stars

Hello. I have been using this add-on for a while with success but as of a few days ago I haven been unable to send or receive events. Maybe it's similar to q149409mvrht. I live in a country where I need to use a VPN to access Google so thought it was that but I can log in to Gmail in my browser no problem (with VPN on.
The "sign in to your account" pop-up opens when I start Thunderbird (doesn't normally). If I log in to Gmail there it makes no difference. If I close that pop-up all my existing events in Lightning become invisible.
Hoping for a fix soon :-)

I used the workaround mentioned in:
Workaround to TB Update 52.0.1 Rated 5 out of 5 stars
by Nighthawk on April 27, 2017 · permalink

Great app with some irritating errors Rated 4 out of 5 stars

I have been using this app for ages, I cannot imagine running by daily business without it.
Lately I experienced some problems with app, which drive me nuts. For example - I can subscribe a Google calendar, which someone shared with me (It is added to my Google account), but I can't see/subcribe my primary calendar. Or I can still subscrive someones Google calendar, even that that person canceled acces given to me.

Honestly, I would pay (reasonable price, of course) for a version without those bugs,

Can't Add and Event to Google Calendar Rated 5 out of 5 stars

I really appreciate this add-on. It's essential to the way I run my business,

Following update to version Provider 3.3 / TB 52,* I can no longer communicate changes to the Google calendars, These events include dismiss an event, Change an event or add a new event . I downgrade to TB 45.8.0, Lightning 4.7.8 and Provider 3.1 and the problem was fixed.

Another challenge with Provider 3.3 is when setting up a new connection. I have two separate Google accounts, each with a number of calendars. During the connection dialog, the email addresses show up correctly, but the calendars shown can be for the wrong account. Regardless of the account chosen, the calendars are for the last account in the list.

For now, I've turned off automatic update.

I'd love to get to the bottom of this. Can you contact me via the support email?

Good app, but cookies Rated 3 out of 5 stars


I use this app for a long time, with great success and without problems.

But this morning an authentication popped up for google calendar, no problem filled it out all good.

After some rerun I understand that I need cookies enabled to login with success - here starts my problems

while investigation of the reason for this, I recognized an exception for is added to allow cookies!

and my big concern is, that it is not httpS://... it is http:// !!

I do not understand why all data that is so privat is ever send through http instead of https!

I would be really please if you could answer me this question.


why does it force cookies enabled ?
-> believe it is needed for the authentication storage, okay
BUT why does it not use ?

a otherwise happy user of your application

Thanks for the report! This might actually be why the cookie exception is not at all working for anyone. The data is sent via https initially, then Google displays the login window which for their own sake I believe is also https. I'll investigate this and release an update that makes the right exception.

Workaround to TB Update 52.0.1 Rated 5 out of 5 stars

I found a workaround for now:

Delete your saved tokens via Options, Security, Saved Passwords. Delete all OAuth tokens for Google Calendar then closed TB.

Open TB. You will get a popup for each Google Account associated with the calendars you have. Pay close attention to the account name and authorise only the first pop-up, then CLOSE the rest, and close TB again. Repeat this process for each Google Account until all are authorised.

Hope that helps everyone