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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?

I have installed the .deb version of Mozilla Firefox on Ubuntu. It was recently replaced by unattended-upgrades with the snap version. I get the impressions that is due to the fact that unattended-upgrades does not consider https://packages.mozilla.org/apt/dists/mozilla/Release as a source when running.

It seems that it would be possible to configure unattended-upgrades to include https://packages.mozilla.org/apt/dists/mozilla/Release.

The current value for "Origin" in https://packages.mozilla.org/apt/dists/mozilla/Release is "namespaces/moz-fx-productdelivery-pr-38b5/repositories/mozilla" (to me pr-number looks like a pull request).

I would like to confirm whether or not this is a stable value for Origin, and if not - can a stable value be allocated?

It seems that after the last automatic update of Firefox, the shortcut to launch it, which was previously on the desktop, was removed, and the Firefox.exe file appeared in its place. I've attached the properties of the new file. My antivirus doesn't flag it as malware and I haven't run the specified file before. Is this an update error?

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.

My reddit post is here: https://www.reddit.com/r/Thunderbird/s/lM11YcRIIT

Hello,

I'm confused and slightly concerned.

Through no deliberate action by me, Thunderbird DOWNGRADED itself from the May 2026 standard release version to an AUGUST 2025 ESR(Extended Support Release) version.

UPDATE: the next application restart brought the ESR version up to date, but why was I forced onto the ESR version?!

What could have pissibly triggered this? I don't want or need ESR, and without knowing the cause, I have e no guarantee it won't happen again. Worst if all, everywhere I look, there is zero explanation for this. It appears to be fairly unprecedented.

My original installer for 102.15.1 was downloaded from the official Thunderbird site in 2025.

The sequence of events:

• I've had Thunderbird version 102.15.1 installed for awhile, but wasn't using it.
• Ysterday I opened it and connected an account.
• Today I noticed it hadn't auto-updated, so I went into the settings and clicked on the 'check for updates'.
• this brought it up to v115.10.1.
• Its success was demonstrated by me being sent to this URL after it opened: https://www.thunderbird.net/en-US/thu.../?locale=en-US&version=115.10.1&channel=release&oldversion=102.15.1(https://www.thunderbird.net/en-US/thunderbird/115.0/whatsnew/?locale=en-US&version=115.10.1&channel=release&oldversion=102.15.1)
• An hour later, I closed Thunderbird completely hoping it would fix a sync that appeared 'stuck'.
• When I re-opened Thunderbird, I saw the small "updating" window. It was pretty surprising since I had *just* updated.
• After Thunderbird opens, after this additional "update", the URL that I'm sent to is this: https://www.thunderbird.net/en-US/thu.../?locale=en-US&version=128.14.0&channel=esr&oldversion=115.18.0(https://www.thunderbird.net/en-US/thunderbird/128.0/whatsnew/?locale=en-US&version=128.14.0&channel=esr&oldversion=115.18.0)
• Thunderbird changed to a year old ESR version!

Hello, I have Macbook using Firefox 115.33 and from time to time i got a note asking to update .I would appreciate if you could help me to do so Thank you Regards Humphrey Louis Moorghen

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.

FireFox Browser messed up my Internet Download Manager and made it impossible to copy and paste from MS WORD to my emails. Once I uninstalled IDM, I was able to copy and paste. I could not even open a picture in another TAB as before. So the browser was updated and messed everything up. I tried the MS EDGE browser, and it functioned like FireFox browser use to as of today.

I am facing an issue with Firefox where every time the browser updates, all of my accounts get logged out, including YouTube, ChatGPT, and other websites. I have already tried repairing, uninstalling, and reinstalling Firefox, but the problem still persists.