Appears to be Source of Not Responding Issues Rated 2 out of 5 stars

When this add-on works it's terrific. Since the advent of Thunderbird 38.0.0 in particular, however, it appears Google Calendar Tab is the source of the frequent "Not Responding" messages and delays I've been experiencing. If this annoyance can be remedied I'll happily boost my rating. Thanks in advance for checking into its performance and making the fix.

This user has 2 previous reviews of this add-on.

Rated 3 out of 5 stars

A pretty good extension, but there is no way to actually integrate Google Calendars into Thunderbird.

Great add-on - And works with Sunrise Rated 4 out of 5 stars

This was a good add-on when I discovered it. Worked perfectly with google calendar and what not. It gave me always on access to my calendar post divorcing myself from the evil Outlook.

BUT THEN OMG AT 3AM I JUST THOUGHT WHAT HAPPENS IF i POINT IT AT SUNRISE WEB INTERFACE IN THE OPTIONS ?

WORKS PERFECTLY AS WELL !

Rated 5 out of 5 stars

very good...

How to switch calendar from agenda view to week view Rated 5 out of 5 stars

I recently installed the Google Calendar add on and I also noticed that IT WOULD ONLY DISPLAY THE AGENDA VIEW (as other reviews have previously stated). I fixed this (on Linux) by editing "~/.thunderbird/locymkyh.default/session.json" and changing:

"tabURI":"https://www.google.com/calendar/m","clickHandler"

to

"tabURI":"https://www.google.com/calendar/render??#g%7Cweek-2+22889+22895+22892","clickHandler"

NOTE: The '/locymkyh.default/' part of the path is uniquely generated for each user profile so yours will be different. Use the following command in a terminal to see yours:

find ~/.thunderbird -type d -iname '*.default'

Also, I don't know what "week-2+22889+22895+22892" means to google, but I don't think it matters. This change should at least get Google Calendar to switch from the mobile agenda view to the desktop week view. If you have problems then try removing "-2+22889+22895+22892". With and without the numbers worked for me.

Rated 5 out of 5 stars

Great add-on.
IMPROVEMENT suggestion:
Tasks are not showing up in Google Calendar when launched from Thunderbird.
From any browser it is showing up fine.

Rated 2 out of 5 stars

When using Google 2-step verification in the screen where you enter the google verification code there's a box to click that says "Don't ask for codes again on this computer", which does nothing. I get a code, enter it, and try to make is so I don't ever have to enter a code again and wallah, it fails. I have application specific passwords that this addon won't use at all so I rate this addon a 2 star.

Escaped Lightning, But... Rated 4 out of 5 stars

I just spent three days trying to get Lightning to show anything at all, gave up, looked around and found this – my calendar appeared right after the restart! But count me in as another plea for adding Google Tasks... that would make it five stars for sure.

Update: Google Tasks Sync shows tasks in my email tab, but no in the calendar tab. That helps, but...

Rated 1 out of 5 stars

Won't let me change accounts. When I click "sign in with a different user" it launches into a browser window (outside of TBird) There seems to be no way to get it to use another account. Other than that, it works fine.

very nice but something changed Rated 5 out of 5 stars

I am a very happy user of this addon, thank to this guy.Just one thing is still broken:I have managed three email adresses on thunderbird, with three google calendars as well but after these days, once I open one calendar account, if I try to add a new one (calendar account), it goes to the browser instead opening a new tab.
If you could fix it would be great indeed.
Thanks

Rated 4 out of 5 stars

Anyone stuck on the Mobile view:

This appears to be just a cookie issue. Try logging out, then logging back in; this fixed it for me. and it's now working beautifully again.

How it works again Rated 5 out of 5 stars

If you're stuck with the mobile calendar version, do the following:
Go to Add-ons Manager -> Google Calendar Tab -> Preferences and add the custom URL: https://www.google.com/calendar/render
It now should work again!

Rated 1 out of 5 stars

Used to work great, then as other reviewers noted, went to Agenda view without a way of reverting to Week view.

Rated 3 out of 5 stars

Used to work great but recently only shows mobile view of calendar :(

Edit: ThunderCal still works - https://addons.mozilla.org/en-us/thunderbird/addon/thundercal/

Now only displays mobile calendar :( Rated 3 out of 5 stars

This tab used to work great. As of relatively recently (even before the upgrade to Thunderbird 24), it started only displaying the MOBILE interface to the calendar (i.e., an agenda view with a very limited interface). Perhaps Google changed their criteria for what browsers see what view. Either way, this app should somehow force the Desktop view of the calendar.

Perfect Rated 5 out of 5 stars

Thank you! It works perfect!

Good Stuff Rated 4 out of 5 stars

Great little add-in. Works better than lightning without the bugs, simplifies the synching issue between desktop and android calenders well.

Love it but... Rated 3 out of 5 stars

Love it but I am having an issue with all event displaying. Apparently if a user that I have shared my calendar creates an event, it does not show up in Google Calendar Tab. It shows up on my Google Calendar page just fine. Please fix this problem and I will easily give you a 5 star rating.

Great add-on Rated 5 out of 5 stars

This is seriously useful. Far better than lightning. Excellent add-on, thanks

Better than Lightning Rated 4 out of 5 stars

Not as feature rich as Lightning, but not as buggy or annoying as Lightning either. Easily the most effective and reliable calendar integration available in Thunderbird.