Thunderbird Community Forum

cannot seem to send emails to multiple people without going thru mail merge. I can no longer type the persons name in to: field and it will not autofill. I tried to go to calendar function and got a blank screen.

Can I go back to a previous version?

I always keep program icon in tray and when a new/unread email arrives, a separate yellow icon would pop up next to it... Well, after updating from 158 to 159, that new/unread icon is no longer popping up. Now I have to periodically click the main program icon to open Thunderbird and see that there's tons of new/unread mail sitting there, but that yellow tray icon never showed!

I would like to roll back to 158 but it is proving to be quite difficult.

When I launch Thunderbird via icon ( version 158), it always brings me to sign on page for Thundermail.. If Thundermail is by invitation only, how do I get back to the real TB page. I can access webmail, my account, and portal. I only see Version 156 in download folder and only have default-release and default in the profile. I have no clue then what is happening. Will bringing back an earlier version. "ABOUT" shows version 158 and nothing else.

Also, my android email & passwords have remained constant and I did not have to change anything.

I use a number of add-ons that greatly enhance Thunderbird but they keep breaking as new updates are released:

Cardbook is a very useful address book add-on, integrating with my Google address book. However a few months ago it stopped working when a Thunderbird update was automatically installed (I think it was V158). The only way of overcoming this was to revert back to the ESR (Extended Support Release). That wasn't compatible with the database that had been modified by the latest release. Fortunately I had a back-up copy of the previous database which I had to recover.

A couple of months ago a new release stopped Cardbook working. By trial and error I discovered that Cardbook had been updated for compatibility with the latest Thunderbird release so I was able to restore normal operation by updating to Thunderbird V158.

Now Thunderbird has updated to V159 and Cardbook has stopped working again. If I open Cardbook it shows the address book completely empty. The Add-on Manager doesn't flag any compatibility issues. This is disasterous for me as I am totally dependent on using Cardbook.

Lightning Calendar Tabs is another useful add-on, giving access to my Google Calendar through a icon in the task bar. However that has also stopped working under V159. The Add-on Manager shows it as being incompatible with V159.

So why does Mozilla keep releasing updates that stop add-ons from working?. Can I revert back to V158 and stop further updates?

Hi,Please assist Every time I open Thunderbird it shows Software Updater(user account Control) But the Sofware is already up to date & this has been happening for over a week

I have had messages about EWS support being ended from 1st October from the Beonex ExQuilla Add-On which I have been using for many years.

So I installed Beonex's new Owl Add-On which supports Microsoft Graph Protocol and migrated my Email accounts. However, this just renamed my existing account with "Old" at the end and created new ones which cannot connect!

The IT provider for the Email Domain will not allow the Owl Beonex App to connect, despite the ExQuilla one being used for many years!

They have now pointed out that Thunderbird natively supports the Microsoft Graph Protocol from Release 154. BUT I am on the ESR channel (as I need stable Email handling) and the latest ESR Release is 153.4.0esr!

So when will an ESR be released with Graph Support, as Microsoft could stop me being able to receive and send Emails any day as it is now past 1st October???? - Please let me know your timeline for the next ESR with Graph support A.S.A.P.

I do not want to install a non-ESR as I see that the latest Release 157.0.1 fixed a bug with the Graph protocol and 155.0 streamlined the manual account configuration. So I want stick with stable releases!

Also, do I have to add new accounts to use Microsoft Graph, or can I just change the configuration of my existing ones?

If the former, then I guess once I am happy I have all old Emails available (as I rely on Emails going back many years!), I can delete the original Accounts from Thunderbird, including the non-working " Old" ones created by the ExQuilla to Owl migration????

Thanks

Is there a way to revert back from a Thunderbird update? I have my inbox with current emails, but my folder organization on the left is disorganized and contents are missing and many folders are missing. It's destroyed YEARS of work!

Downloaded Thunderbird update and program now opens to Xfinity but no updated emails... Can I remove and re-install it without losing all my previous emails and contacts? Or is there any better fix?

• NOTE* It's Version 158.0...

I have no accounts, no old emails, nothing.

Version 153.4.0esr | Released September 30, 2026

Update History The following updates have been installed Thunderbird 153.4.Oesr (20260929234349) Installed on: October 5, 2026 at 6:23:30 AM Status: The Update was successfully installed Thunderbird 153.3. lesr (20260917204311) Installed on: September 18, 2026 at 3:24:29 PM Status: The Update was successfully installed

Old tower PC Edition Windows 10 Home Version 22H2 Installed on 11/12/2020 OS Build 19045.7725

Gateway Processor Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz 3.40 GHz Installed RAM 16.0 GB (15.8 GB usable) Storage 4 GB HDD ST4000NC001, 932 GB HDD ST1000DM003-9YN162, 1.82 TB HDD Hitachi HUA722020ALA331, 117 GB SSD SanDisk SDSSDP128G, 7.28 TB HDD ST8000DM004-2CX188 Graphics Card Intel(R) HD Graphics 4000 (96 MB) Device ID C6B6F480-ED70-4787-A153-1FD620BAFDA9 Product ID 00326-10000-00000-AA675 System Type 64-bit operating system, x64-based processor Pen and touch No pen or touch input is available for this display

Hello Thunderbird Support Team,

I recently updated Thunderbird on my Ubuntu system. After the update, Thunderbird no longer starts normally.

When I try to launch Thunderbird, a window appears showing the following error:

There is also a caret (^) shown below the beginning of the line, as visible in the attached screenshot.

Before the update, Thunderbird was working normally. The problem started immediately after the update.

System information:

OS: Ubuntu 26.04.1 Thunderbird: 157.0.1-1

Could you please help me identify the cause of this issue and provide a solution?

I would also appreciate any recommended diagnostic commands or logs that I should provide to help troubleshoot the problem.

Thank you.

Best regards, Mohsen Rezaee

I had my dad on Thunderbird, and migrated him to Evolution, after your horrible failure. I only wish there was a Mac version, I'm stuck on Thunderbird on my Macs. There is no way I can trust Thunderbird, after this destructive failure. They tried to force people off of apt, Linux, and put in hooks to have apt use SNAP, want it or not! When it force migrated him off of apt, which was NOT wanted, or asked for, it lost ALL of his Thunderbird data.

Not only are you not smart enough to realize that some people don't want SNAP, AppImage, FlatPak, or other crap sandboxed garbage, but, without giving them a choice, trying to force a screwed up migration, that obviously doesn't work, and deleting ALL of their data is unacceptable. Even if it hadn't lost all of his data, it wasn't wanted, and I would have had to undo the damage.

FIreFox is the same shit, forcing to SNAP garbage. Fortunately, I have him on Brave, so it's not really needed, just installed for backup, but not being used.

I had to create install scripts just to get them to install normally, no SNAP GARBAGE! It was not easy, because they still try to force migrate.

There are a lot of authors now coming to Linux, that know nothing about it, and don't know how to use apt, so they try that sandboxed shit, not understanding that's why a lot of people are abandoning Windows and Mac in the first place. But most, if not all of them, at least have a .deb to download, or options. This is the first software I have seen trick apt into installing SNAP, then deleting all of its data. And, yes, after searching the entire drive, the data was gone.

What you did is complete BS, and unlike some of those newer people moving to Linux, you can't blame ignorance, because you are not new.

Firefox said to update to 153.4.0 esr to continue to use Google Calendar. I did and was able to recover the calendar. But the upgrade lost all my emails and folders. Previous answers for lost emails have not worked. Please give me a step by step procedure to recover my emails. Thank you

I see a "Thunderbird ESR" notice appears when I open my laptop. I searched to see what it means. I'm still confused. 1) where did it come from? 2) is it best for me? I am a senior not interested in lots of changes (except improvements), but I am not an organization. Should I do anything or just leave it?

Suzanne

Hello, So my thunderbird updated yesterday 10/1/2026 and since then it's changed my layout and also making problems in attaching documents etc. Is there a way to revert to the last version? Or does someone have a way to fix this problem?

Ever since the last update 157 when i open a conversation it open every single tab in that conversation and i hate that, cause i have to close every one to go to another email. this stupid updating thing is for the birds. Another thing that i really liked in past versions that whatever color tag i wanted to use would color the subject line now it just does a little symbol all the way on the right side. Can i uninstall a update by chance?

I'm assiting an elderly user of Thunderbird. We were trying to update his saved password but the menu items did not match my current version 153.3.1esr. When I asked him to check his version he had options to update from v52. He went through 3 update cycles to v78 when all his data had disappeared. I found some information at: https://support.mozilla.org/mk/questions/1312391 which seemed to put the issue at a file format change in v78. When he looked at the profile folders the most recent was created in 2024. (I couldn't get him to find a modified date more recently.) When he closed Thunderbird and used the Run command "Thunderbird.exe -P" we couldn't find a way to select that most recent profile folder. Are you able to give me instructions I can use in a Windows remote (quick) assist session to restore his data from the profile folder?

Alternatively, is it possible to downgrade back to v68 of Thunderbird; would this restore his data (account settings, emails, contacts/address book etc?

Thanks in advance for any guidance you may be able to offer.

I installed Ubuntu 26.04 on one of my laptops. I want to import my Thunderbird profile from another computer running mx linux. This one has 140.16.0esr(64 bit). I've been advised to make sure I have the same version on both computers to avoid compatibility issues. The new OS installed 156.01. How do I get the same version on the mx linux computer?