Extremely slow Ohodnoceno 1 z 5 hvězdiček

This add-on makes the calender extremely slow to load and to browse through.

Severe slowdown Ohodnoceno 1 z 5 hvězdiček

I'm all of the sudden experiencing severe slowdowns in TB. I've been using this add-on for quiet some time and have been happy with it, but since yesterday, TB now needs up to 2 minutes or so, because I can actually use it. While in TB and writing a mail, I occasionally experience slowdowns here as well. Could be syncing related.

I've tried disabling all calendars, but that didn't help anything. Only by disabling this add-on I can access TB normally.

Fully automated, works great. Ohodnoceno 5 z 5 hvězdiček

This review is for the newest versions at the time:
Thunderbird 38.3.0
Provider for google calendar 1.0.4
The setup was very straightforward. (you have to have the Provider addon installed and enabled)
File->New->Calendar->Network Calendar->Enter gmail address->Enter gmail password->Choose Calendars to sync

That was it, you are ready to go.
Avoid older instructions in thunderbird support using xml instructions and such, it is not needed.

slows down TB Ohodnoceno 1 z 5 hvězdiček

Meanwhile my TB with this addon has become so slowly that I had to disable the addon. TB was no longer usable :-(

Tento uživatel má jednu dřívější recenzi tohoto doplňku.

Works pretty well, I wish the full sync every time would be fixed Ohodnoceno 4 z 5 hvězdiček

Philipp thanks for your work on this Add-On, it makes checking my family google calendar very convenient. One comment on the sync issue which I think has been brought up in other reviews: Mine does a full sync of 756 events each time I start TB. Basically I wait until that sync is complete (about a minute), then TB works just fine. Question - you mentioned that a "token" gets saved on your PC after each full sync so it knows to sync only incremental changes. I have let the entire sync operation complete. How do I know if this token has been saved? Or is there some other configuration option I'm missing (perhaps saving cookies?) Thanks again.

unusable with large numbers of events? Ohodnoceno 4 z 5 hvězdiček

I have been using the extension for a while. I really need it but I have issues related to syncing too. It happens very frequently and freezes Thunderbird for a while. I have to say that I'm using many calendars at the same time, and that I use to delay many alerts. As I see that syncing is a complicated issue, I 'm thinking about a workaround: having a button that turns syncing on/off on demand! It would be wonderful!
Thanks for the extension.

Ohodnoceno 3 z 5 hvězdiček

Multiple users share a calendar through one account. However, users must log in again ( within 1-3 weeks ) using the Google popup window .

Work, but not quite Ohodnoceno 4 z 5 hvězdiček

It works fine, except for one thing. The login isn't remembered. Every time Thunderbird is started (effectively once a day for me) I get two Google login screens (I assume once for calendar, and another for tasks, althouth it's the same account..)

Otherwise, good plugin.

Thanks for the quick response!
Seems to have worked. Let's see for how long, but for now, somehow, re-adding the calendar fixed it. I restarted TB and it doesn't ask for my login again. I'll increase my rating ;)

Can you try unsubscribing from calendar and tasks lists, then re-subscribing and making sure you enter one email address when prompted? I've heard of this issue, but I haven't been able to reproduce it.

Still slow, but not so terribly as before Ohodnoceno 3 z 5 hvězdiček

After the developers hint to disable Birthdays Calendar it is quicker, but still does not perform like it used to. I think this is related to the Public Holidays calendar which is still active and needed. I'm looking forward to the next version which hopefully resolves this issue completely.

Yes, there is. This may be the issue with the Birthdays Calendar. Please unsubscribe from this calendar until I release the next version. Aside from that, the first sync always takes a while, it should be fast after that.

No sync Google -> Thunderbird Ohodnoceno 1 z 5 hvězdiček

I tested it now for a few days and I have to say sorry it's not working.
1. If I have an entry in Thunderbird new or changed one it's synchronising to Google but if I change an entry or create a new one in Google there is no synchronisation.
2. If I click the Sync Button it will synchronize the whole calender, all entries! This blocks Thunderbird comoplitly.
With this two bugs it's unusable, very pitty.

Won't syn primary Thunderbird calendar Ohodnoceno 1 z 5 hvězdiček

The sync works great for my google calendars into Thunderbird, but will NOT sync the default Thunderbird calendar back into google. This is a major issue, as all of my work events are created in Thunderbird using the default calendar. I must get these events back into google, otherwise the entire sync concept is useless.

Just Doesn't Work Ohodnoceno 1 z 5 hvězdiček

I have the latest versions of T'bird. and Lightning. when I downloaded and "installed" Provider, the add-ons list shows it there, but absolutely none of the events in my Google calendar show up. Since everyone else seems to like this add-on, I lay the problem to quite literally NO instructions on how to set up or use this add-on. NOTHING about this is automatic, so there must be some set up involved. Mr. Developer, not everyone is a 16-year old computer geek, you need some instructions for us senior citizens...

To set things up, right click on the calendar list and select "New Calendar". This should guide you through the steps.

unusable with large numbers of events Ohodnoceno 1 z 5 hvězdiček

Following up some other previous comments, I'm obliged to rate this add-on very poorly due to the wrong design philosophy.
When syncing with a remote calendar the application loads all the events (1000, with no option to set less), but if TB is restarted the whole syncing process restarts.
This design choice is maybe not an issue when you have 2/3 calendars with a total of few hundreds events, but when your company is using google calendar events and you have dozens of colleagues all having 1000 events to share, it all becomes completely unusable.
On top of it, the syncing process is started without any user prompt, so TB is completely non responsive, making it worthless.

While I appreciate the overall idea behind, the implementation is so rotten that I can only wish in a major rework.


Before commenting on the design philosophy, maybe you should read the code to confirm that this is actually the design philosophy used. Quite unfair to leave this kind of comment based on a few observations in the UI.

On the first synchronization, the Provider for Google Calendar downloads all events from the remote calendar, in batches of 1000 (hence the number you are seeing). It is not clear how many events are in the calendar at this stage. Once this batch is through, the next one is started, which also displays as xxx of 1000. Admittedly, I could display this differently by not always showing xxx of 1000 but jumping to 1001 of 2000. There is an advanced option to change the batch size, but this is not necessary.

Once the initial synchronization is done, the synchronization token is saved locally and all future synchronizations are incremental: only changed events are downloaded. So, let me guess, this is exactly how synchronization software should work? Yes, I thought so.

That said, what is happening in your case is probably that the initial sync is not complete, hence the token is not saved on shutdown and next time you start up, it attempts to start over. Please give it some time.

Almost continious sync of calendar events ! Ohodnoceno 1 z 5 hvězdiček

following comment from h_metzger (https://addons.mozilla.org/en-us/thunderbird/addon/provider-for-google-calendar/reviews/749824/), I'm also experiencing a complete slowdown in thunderbird with this add-on. TB shows (in the status bar at the bottom of the window) a very very long and slow sync of ~thousand of calendar events and that process is continuously repeating every few minutes !.
Anybody has found a workaround for this problem !

There's a trick! Ohodnoceno 5 z 5 hvězdiček

This module works perfectly for me. When it doesn't, (nothing appearing in both Agenda and tasks from Google) there is a trick to do :
Close thunderbird
Go to your profile folder (usually it's there : C:\Users\YourUserFolder\AppData\Roaming\Thunderbird\Profiles\YourThunderbirdProfile.default).
In that profile folder, open the folder named "calendar-data", delete everything in it (cache.sqlite something and deleted.sqlite) except the "backup" folder.
Close the open folders.
Restart Thunderbird and everything should be working fine.

Works perfectly Ohodnoceno 5 z 5 hvězdiček

Of course, Google changes it's rules wihtout further notifications, so, it can happen once every 2 years, few buggs appears. But what...? I've been using this app for the last 3 years and it works great, I don't even think about that. All you have to do is to READ TH MANUAL and do your little home work...

I rve read many negative reports, due to inappropriate behaviour of users...

Thank you to creator!


Tento uživatel má 2 předchozí recenze tohoto doplňku.

Get the job done as advertised but does so very slowly. I mean VERY. Ohodnoceno 1 z 5 hvězdiček

The addon provides access to your Google calender(s). Setting it up is a breeze. No problems there. The issues, however, start after. Thunderbird reacts very slowly. At first I thought this is because of the initial synchronization of the calenders. But that wasn't it, sadly. Thunderbird, with this addon, becomes unusable.

Works Great Ohodnoceno 5 z 5 hvězdiček

Keeps my schedules synced and easier for me to modify ever changing events from desk. Thank you!

Don't install unless you have time to spare Ohodnoceno 1 z 5 hvězdiček

Must have installed this at some point in the past, started getting this annoying message every time I tried to start thunderbird that provider needed me to login to get data. Didn't even know what that meant but finally gave in and logged in. I have several calendars with thousands of events, and it is not bright enough to only sync future events, so now I'm sitting here unable to do anything in my email until it decides to sync everything. Tried to uninstall it and restarted thunderbird, that failed as when I started thunderbird again it started syncing right where it left off.

The full synchronization only happens once, afterwards all synchronizations will be incremental and therefore very quick. This is how it is meant to be, the Google Calendar API allows synchronizing changes made using a token that defines when the last change was made. There is no simple way to just retrieve changed events after a certain time point without eventually having to re-synchronize all events if you scroll to the past.

Very slow switching between months Ohodnoceno 3 z 5 hvězdiček

It takes quite a long time to go from one month to the next, during which time Thunderbird will not respond. Yes, it is fetching info from the Internet, but this fetch is much slower than most Web interactions, perhaps because it is doing it on a field-by-field basis.

Ideally, the code would be fixed by somehow working faster. If that is not possible:

1) Create a local cache larger than one month. For me, that would be one month in the past and 11 months past the current month into the future. But since peoples' needs are different, have it be configurarable.

2) Do it in the background so I can do something else in Tbird while I am waiting for the data to come.

3) The Cache would ideally allow me to view and edit my calendar offline, to be sync'ed later.

I will gladly contribute if performance is improved.