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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

Can you just please stop to force user to restart when there's an update? its annoying really, i've been using firefox for years, and this thing makes me want to leave firefox. At least make this message optional, let user continue browser at will and apply the update when the user finished using firefox. ps. my setting: Automatically install update ON -> When Firefox is not running (ticked/ON).

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?

Firefox just forced a terrible update on me that makes everything look round and different and I hate it so much. I don't understand why they think people want things to change all the time instead of being allowed to get familiar with something and now have it change on you without even asking if you want it to change!

firfox updated this morrning. windows 10. now I keep losing the keyboard and mouse controls and have to reboot to recover them is there some way of restoring the previous version of fireefox??

About an hour ago Firefox auto updated to the latest and greatest version. It has ruined my online experience. It takes 5-10 or more seconds for a website to respond to my requests to do anything. Is there a quick way to go back to the previous version or do I need to uninstall the current version and then reinstall the previous version?

Hello, I'm pretty tired of Firefox updating itself without asking me or warning me, just telling me that it's going to force me to restart and kill all of my private windows without any chance of continuing browsing. I'd like to disable updates but it seems that they are forced upon the user regardless of choice. Is there a way to prevent them from happening? I managed to disable them on Linux by some miracle but can't find a way to do the same on Mac. I'd also like to remove the little popup that suggests updates every time I open it. No chance of that either? The browser is made for browsing and not for serving the needs of the browser. I really love what Firefox used to be but at this point I might as well switch to something else. The blatant disregard for user experience is what's killing me.

It would be greatly appreciated if the browser didn't update with adding a new default customization. If there's a way to revert back to the old browser, I would prefer that over the extra customization any day.