Thunderbird Community Forum

So, updated from 147.x to 148.0 this morning 9Win 11 Pro), and didn't take me long to realize that the upgrade nukes Google calendaring using Provider. With 148, if I look at the calendar, 100% of the entires are 'missing'.

If I (i) unsubscribe from the calendars, (ii) uninstall Google Provider, (iii) re0install Provider and re-authenticate, (iv) re-subscribe, then calendar entries are shown.

But...if I turn off TB, and turn it back on again, calendar entries disappear.

Note this is only an issue with 148.0. On my other machines (which largely run 140.x), not a problem.

After running an update, when launching Thunderbird it says "Your computer must be restarted to complete a previous upgrade of Thunderbird. Do you want to reboot now?". Rebooting does nothing, I'm prompted with the same message. Tried re-installing the latest version - it gives me the same error message before re-installying, and also un-installing the version I have on my PC - it also prompts me to restart to finish the earlier upgrade.

Twice in one week a complete wipeout of all my accounts and emails, hours spent restoring my information after the first update, now a second one, do you do not care about the users of this product? and you wonder why you don't get donations when you wipe out everything and give NO instructions on how to avoid all this. Where is the version hidden?

Ich habe ein Update von meinem Tunderbird Konto gemacht. Meine Software ist Windows 10. nun habe ich keineUnterlagen mehr. Was soll ich tun. bitte um Hilfe. Bin bereits82 Jahre alt und habe keine Hilfe.

Hi, I will just open with a notice to Mozilla - I would happily donate to your work IF..... There are a number of irritating features I encounter using Thunderbird but one of the most infuriating is that when updating, any message tabs that were previously open disappear - when surely it must be possible to locate these in a straightforward data file somewhere - ready to populate automatically or even manually would be appreciated? At least, Firefox, after a bit of searching does keep a list of history..... but who wants to open ALL tabs in any period of history regardless of whether they were open when the update occurred.

Colours of anything and everything could be varied to speed up and simplify use? Server settings are all over the place... taking longer to enter/locate and edit than they ever should..... seeing a list of every setting inside a postage-stamp box without being able to even see much of it - after all these years surely you can over-rule Microsoft? Avoid kowtowing to monopolies!

I must get on with proper work so will stop moaning now... but my first line stands - get things professional and smoother with greatly increased options and I'll (probably like many others) be keen to give financial support!

Warmest wishes, Tom

I see that MS Exchange server support is available in Thunderbird version 145 and above. I have a Linux Mint PC which is version 140 which when I try to upgrade I'm told I'm on the latest version. Is there a version 145 and above for Mint and if so how do I upgrade it??

Thank you

Every time I let Thunderbird update, the format changes to a previous format and my emails and folders are gone.

Having to call my contacts to have them send these receipts again is frustrating. Setting up new folders AGAIN is frustrating.

I have thought of contributing to you, but this behavior is beyond infuriating and costs me hours and hours of time to fix.

How can I get consistency? How can I retrieve what is lost? The only thing I know to do is to STOP letting you update my program.

Not a happy camper.

May 25 2026. A few days ago, Thunderbird upgraded me to Release 151.0. I can no longer send or receive emails.

My wife has been upgraded to ESR 140.11.Oesr, and she has no problems.

I do not want to go through the tests of removing virus guard etc to try to make 151.0 work, so I would like to move to ESR 140.11, but cannot find online how to do that?

Please help.

I'm up to date on Windows 10 with version 151.0.1 of Thunderbird. My preference is to discontinue using Windows and move to Linux Mint. The Software Manager in Mint installs and manages Thunderbird updates. I like the idea of Mint managing my software. However, the latest version is 140.11.1esr. Consequently, moving my data from Windows to Mint is not possible. A profile problem is flagged.

I've switched off automatic updates. I'm wondering how long it will take Linux Mint to catch up to v150. One solution is to install v150 independent of the Mint software manager, but I'd rather not do that. I'm wondering if there are any workarounds.

I opened Thunderbird 140.9.1esr from flatpak on Debian 12 and today I noticed a message that says: "Flatpak ESR application ID change We're switching the Flatpak ESR application ID from org.mozilla.Thunderbird to org.mozilla.thunderbord_esr."

1. How does Thunderbird know it's flatpak name is changing? How do i turn off all auto updates including checking things like flatpak name changing?

Auf meinem Laptop mit Windows 11 Home öffnet Thunderbird sich und der Bildschirm "Willkommen bei der Freiheit" erscheint. Dieser Bildschirm lässt sich nicht schließen. Es gibt keinen X Button. Ich kann lediglich auf links wie Mitmachen, Spenden, etc. klicken, aber meine E-Mails nicht sehen. Das Problem besteht seit gestern, ein Update habe ich am 27.03. gemacht.

I'm currently running Thunderbird 140.9.1esr and it shows an update available to version 140.10.0esr. However, when I click on the update button, it shows "downloading" but it stays at 0 bytes and will not download the update. All previous updates to my current version automatically downloaded and installed after I clicked on the update button. How do I fix this or is there a problem with 140.10.0esr? Thank you!

It appears that Thunderbird was very recently changed. I was very happy with the version I was using before the change. How can I get my old version back?

I don't know what version that was. I have used Thunderbird for a while. Does that imply that the previous version was 149.01? Or was it 148.01?

I had been using Thunderbird on a linux computer (ubuntu). I am now using it on a windows machine (temporarily, I hope). Could that be the reason I see a dramatic difference?

Thank you.

It would have been highly beneficial to provide a function or procedure to migrate all files (if they existed) from org.mozilla.Thunderbird to org.mozilla.thunderbird. In the absence of such a mechanism, the update effectively behaves like a fresh installation, creating the impression that all user settings and data have been lost.

I resolved the issue by manually copying all files from /home/USER_NAME/.var/app/org.mozilla.Thunderbird/ to /home/USER_NAME/.var/app/org.mozilla.thunderbird/ and restarting Thunderbird, after which everything functioned as expected. This could also have been addressed through a symbolic link to the new path.

I believe more care should be taken when implementing breaking changes of this nature, as many end-users would not know how to resolve this issue on their own. Clear guidance or automated migration would help prevent unnecessary disruption and confusion.