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Thunderbird 140.5.0esr (64-bit) on ubuntu unity 24.04 Desktop

Hi. I'm a long time and happy user of Thunderbird.

I have some suggestions to make it even better IMHO:

1. I would like to see some color added to the Calendar to make it visually more appealing. Right now it is grays and blacks - see attached pic. It would be nice if there were options to change the colors of the top 4 lines.

Currently you can choose a Category Color, but I would like to see the Title of the Event in that color, not just a tiny unobtrusive Bar at the end of the Title.

2. When you Click on an Event, a Screen comes up showing some information for that Event and an 'Edit' button. I don't see the point of this. Why not go directly into the Edit ? Of course for Multiple Occurrence Events, you would still first ask if the Edit is for 'Current' or 'All'.

3. I don't get the 'ESR' & 'Release' business. I have the 'ESR' version which, I believe, means I will only get updates once a year. Why ?

Seems like a hassle to convert to the 'Release' version. I don't think I will bother. Why not just have one version, and provide updates regularly as most other Software does?

I really appreciate this venue which provides the ability to post questions. Last week I got a long time problem resolved as a result.

Thanks for listening. M.....

Hi, am not finding anything helpful in the support area, so hoping someone can help me solve. When a calendar reminder pops up, and I try to snooze or dismiss, I get this message:

Status Code: 2,147,500,037, null

Server Replied with 400 If you’re seeing this message after snoozing or dismissing a reminder and this is for a calendar you do not want to add or edit events for, you can mark this calendar as read-only to avoid such experience in future. To do so, get to the calendar properties by right-clicking on this calendar in the list in the calendar or task view.

Thing is, I do want to add and edit events, so I have no other options and the reminder keeps popping up every couple of minutes it seems. Any help resolving is appreciated. Thx!

Thunderbird version 140.5.0esr 32 bit now seems to dismiss reminders on its own -- i.e. without authorization/permission.

This makes the calendar/reminders feature worthless, at least to me.

Am I missing some setting so the old behavior can return? (Previously, each reminder would have to be dismissed or snoozed manually before it would vanish from the reminders window)

Thank you so much!

I'd like to keep both the Inbox and Calendar windows open on different monitors. But when I drag the Calendar tab away to a new window, the new window gets another copy of the Inbox tab that I cannot remove.

How can I have a clean Calendar window with no other tabs and no tab bar?

See screenshot

would like to open lightning (calendar) from desktop w/o opening Thunderbird. Have W-10 home, Thunderbird is v-45.5.0 Thanks PS make it easy on directions as I am in the PC learning stage at 75 DJ

I have spent hours trying to figure out how to access my lightning calendar from my IPhone - with no luck. Unfortunately the Google connection is not the answer because it will only import a google calendar into lightning - not vice versa. Unless I am doing something wrong that is..... Any help would be appreciated

After I allowed the upgrade to 54.4, the Calendar is no longer showing on Thunderbird. What's confusing is that if Lighting is packaged with Thunderbird (after V38), I shouldn't have to also add-on Lighting, right?

This is on Windows 7.

Below is the Troubleshooting Information:

 Application Basics

   Name: Thunderbird
   Version: 52.4.0
   User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.4.0
   Profile Folder: Open Folder

             (Local drive)
   Application Build ID: 20171004092449
   Enabled Plugins: about:plugins
   Build Configuration: about:buildconfig
   Memory Use: about:memory
   Profiles: about:profiles

 Mail and News Accounts
   account2:
     INCOMING: account2, , (none) Local Folders, plain, passwordCleartext

   account3:
     INCOMING: account3, , (imap) secure175.inmotionhosting.com:143, alwaysSTARTTLS, passwordCleartext
     OUTGOING: , secure175.inmotionhosting.com:465, SSL, passwordCleartext, true

 Crash Reports

 Extensions
   Provider for Google Calendar, 3.3, true, {a62ef8ec-5fdc-40c2-873c-223b8a6925cc}
   Bitdefender Antispam Toolbar, 7.0, false, bdThunderbird@bitdefender.com

 Important Modified Preferences

   Name: Value

     accessibility.typeaheadfind.flashBar: 0
     browser.cache.disk.capacity: 358400
     browser.cache.disk.filesystem_reported: 1
     extensions.lastAppVersion: 52.4.0
     font.name.monospace.el: Consolas
     font.name.monospace.x-cyrillic: Consolas
     font.name.monospace.x-unicode: Consolas
     font.name.monospace.x-western: Consolas
     font.name.sans-serif.el: Calibri
     font.name.sans-serif.x-cyrillic: Calibri
     font.name.sans-serif.x-unicode: Calibri
     font.name.sans-serif.x-western: Calibri
     font.name.serif.el: Cambria
     font.name.serif.x-cyrillic: Cambria
     font.name.serif.x-unicode: Cambria
     font.name.serif.x-western: Cambria
     font.size.fixed.el: 14
     font.size.fixed.x-cyrillic: 14
     font.size.fixed.x-unicode: 14
     font.size.fixed.x-western: 14
     font.size.variable.el: 17
     font.size.variable.x-cyrillic: 17
     font.size.variable.x-unicode: 17
     font.size.variable.x-western: 17
     mail.openMessageBehavior.version: 1
     mail.winsearch.firstRunDone: true
     mailnews.database.global.datastore.id: d50e783d-8aa1-446b-9a63-b17819eabb8
     mailnews.database.global.views.conversation.columns: {"threadCol":{"visible":true,"ordinal":"1"},"flaggedCol":{"visible":true,"ordinal":"3"},"attachmentCol":{"visible":false…
     media.gmp.storage.version.observed: 1
     network.cookie.prefsMigrated: true
     network.predictor.cleaned-up: true
     places.database.lastMaintenance: 1507778828
     places.history.expiration.transient_current_max_pages: 122334
     security.sandbox.content.tempDirSuffix: {4bc965e3-a0da-4a6b-9f8c-4306934d2f06}

 Graphics

     GPU #1
     Description: AMD Radeon HD 6600 Series
     Vendor ID: 0x1002
     Device ID: 0x6758
     RAM: 1024
     Drivers: aticfx64 aticfx64 aticfx64 aticfx32 aticfx32 aticfx32 atiumd64 atidxx64 atidxx64 atiumdag atidxx32 atidxx32 atiumdva atiumd6a atitmm64
     Driver Version: 8.850.0.0
     Driver Date: 4-19-2011

     Features
     Direct2D: false
     DirectWrite: true (6.2.9200.22164)
     WebGL Renderer: Google Inc. -- ANGLE (AMD Radeon HD 6600 Series Direct3D9Ex vs_3_0 ps_3_0) -- OpenGL ES 2.0 (ANGLE 2.1.0.2a250c8a0e15)

     AzureCanvasBackend: skia
     AzureCanvasAccelerated: 0
     AzureFallbackCanvasBackend: cairo
     AzureContentBackend: skia

 JavaScript

 Incremental GC: 1

 Accessibility

   Activated: 0
   Prevent Accessibility: 0

 Library Versions

     Expected minimum version
     Version in use

     NSPR
     4.13.1
     4.13.1

     NSS
     3.28.6
     3.28.6

     NSS Util
     3.28.6
     3.28.6

     NSS SSL
     3.28.6
     3.28.6

     NSS S/MIME
     3.28.6
     3.28.6

I have Thunderbird with Lightning that I use for work. I have several calendars set up in Lightning (local, google, and Exchange) which each have a different purpose, and have all been working together happily for two and a half years.

Yesterday, Thunderbird upgraded to v52.1.1 and on boot upgraded my plugins as well, and now my Exchange calendar (via Exchange EWS Provider 3.8.0-beta2) will not synchronize at all. I deleted the Exchange calendar with the intention of re-creating it - but now there is no communication between Lightning and the company Exchange server so I can't recreate the link at all.

Thunderbird is still talking to the Exchange server perfectly (via ExQuilla) so e-mail communication is not affected. This also proves both the server, account and password are still intact and working. I CAN still use the company's web version of outlook to access both e-mail and the calendar, so I know that system is still working from the server side.

I don't know if the issue is with Thunderbird, Lightning or Exchange EWS Provider, but it is a royal pain only having two of my three calendars available in TB, and having to use a web version of Outlook to access the third. Company security policies prevent me using an alternative to the Exchange server for company events so I'm a bit tied to it...

I note several others are reporting the same issue on github.

Does anyone know of a solution to this?

Thanks in anticipation.

As of the update yesterday, Lightning disappeared from Thunderbird. I am on the beta update channel. Further, trying to manually install it fails with an unsupported version message.

Hello, I just upgraded to a new mac and installed a fresh download of Thunderbird. Things are working well except for trouble subscribing to this astronomy calendar: https://cantonbecker.com/astronomy-calendar/astrocal.ics It works OK on my old mac/Thunderbird setup, but not on the new setup.

Details: New system, where the astrocal calendar doesn't work: MacBook Air M4 2025, running MacOS Tahoe 26.1, Thunderbird 146.0

Old system, where the astrocal calendar works: MacBook Air Intel i5 2017, running MacOS High Sierra 10.13.6, Thunderbird 115.10.1 (64 bit)

My steps to subscribe are Event and Tasks tab click Calendar On the bottom left I click New Calendar This opens a Create new Calendar window. Click On the network, Next I select "This location doesn't require credentials" and "Offline support" I fill in the URL: https://cantonbecker.com/astronomy-calendar/astrocal.ics, then click Find Calendars At this point on the new Thunderbird I get the error: Could not find calendars at this location. Please check your settings. (screenshot) But on the old Thunderbird I get that astrocal is available, and it actually works.

Any ideas? Is it a bug in the latest version of Thunderbird?

Thanks,

Peter H. PS: The new mac's default Calendar app subscribes to the astrocal calendar OK. It's just the new Thunderbird that has trouble. PPS: The new Thunderbird does successfully subscribe to another calendar, of Japanese holidays https://ics.calendarlabs.com/54/44bd6152/Japan_Holidays.ics That makes me more confused as to where the problem lies.

I would like to create a calendar event directly from an email message so that the event links to the email or at least contains the information in the message. It looks like this does not exist in Lightning but perhaps there is an add-on?

If there is no way to do that directly, what is the best option for linking to the information in the email message? Just cutting and pasting the information in the message? It would be better to link to the email directly but maybe that is not possible.

I thought I could save the email as a file and then save it as an attachment to the event. However, when I click "Attachment" at the bottom of the event, nothing seems to happen. No new window opens so I cannot select a file. Does this mean that my installation may be corrupt?

Hi there, on my system it seems that the only way to navigate through time in the calendar is by mouse scolling. Mostly using laptop with trackpad, this is inconvenient. How come we can't navigate with directional arrows, jumping to the day directly above/below/beside the currently highlighted day? Thanks

this is sort of a dumb question but i need to send meeting requests for people - I'm on East Coast, but meetings will take next month on West Coast. When setting up a meeting in Lightning, i remember you could toggle to a different city/timezone. But i don't see that feature anymore.

what's best practice for setting up a meeting here, on East coast, for West coast?

Hey. Please indicate whether or not the expected behavior is that the event notification window disappears independently through razlichnyye periods. Is there any way to change the display time of the notification window. Changes in about: config nickname failed. Sorry for my english.

 Thank you.

I would like to view my calendar month/week and see my regular events in one colour, but any individual events or ones that I want to stand out, to be in a different colour other than the default dark blue. If these are chooseable for each event, I could then have a different colour if it was a particular type of event (eg. a one-off sports event), rather than a regular weekly event.

Is there a way to copy Lightning calendar entries? Often, you will want to use an existing calendar entry as the starting point for a new entry which is almost identical (but not quite recurring), so I wondered if there was an easy way to do that.

I normally use CAT (Central African Time) as my default time zone, I am now in New Zealand on holiday, and any events I enter are then reflected in CAT rather than NZ time. I would like to have my calendar reflecting NZ time whilst in NZ, alternatively be able to view events in both, if at all possible.