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Recently clicked to update to the next version of Firefox. Then I get the message "Restart to Update Firefox." I restart Firefox but the message is still there when I click Help > About Firefox. It would appear that the update did not happen for some reason. Do I need to re-install Firefox to get around this problem?

Recently we've began installing Firefox 140.2.0esr to our environment via the .msi file that Mozilla provides, however we're running in to a very odd incident.

After approximately 24 hours from installing Firefox esr to devices, it appears that the application is "updating" to 141.0.3 on the "release" channel. As far as I'm aware, this shouldn't be possible to begin with. But we've applied these settings via GPO:

Computer Config > Policies > Admin Templates > Mozilla > Firefox Application Autoupdate = Disabled Pin updates to a specific version = Enabled = Set to 140.2.0 Background updater = Disabled Disable Update = Enabled Manual Update Only = Enabled

After applying the GPO, confirmed this appears within the registry:

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Mozilla\Firefox\ AppAutoUpdate = 0 AppUpdatePin = 140.2.0 BackgroundAppUpdate = 0 DisableAppUpdate = 1 ManualAppUpdateOnly = 1

At this point, I'm at a loss. We cannot have rapid release be what's installed in our environment. Is there something broken with 140.2.0 or are we doing something wrong here?

Thunderbird just updated itself to a state where I need to do the setup process manually, which always takes a few hours (with networksolutions as the host). How can I continue to work with the previous version until the bug is fixed or I have time to go through the entire complicated process? Thanks in advance, Knut

I get an error message when I try to update (see screen shot below). Thunderbird is on a Windows 11 Pro PC with the latest Windows updates. This has been happening for a couple of weeks now.

Thanks in advance for your assistance.

Rich

Hello,

Moving from an older Ubuntu 18.04 machine where Firefox is limited to version 113 to a newer machine running Mint 22 where the current version is 134.

I know how to transfer the profiles but I could not find any information on compatibility.

Would I need to install other versions before 134 to handle any changes?

Thank you

Signed on to Thunderbird a couple of days ago to see a message about a new release. Seeing no way around it, I went for the update. Thunderbird now opens to a screen asking for an account setup. Name, email, and password--which I assume is the main email server (AOL in this case). I fill this in, click on test, and Thunderbird comes back with an available POP3 configuration it found, which is not the one I have been using for several years. I try it out, Thunderbird tests the password and finds something in the password or configuration that doesn't work. I try a manual configuration the the correct pop3 and smtp addresses and get the same result. I am at a complete loss at this time. This is all I get when I try to open Thunderbird--none of the usual email boxes, calendar, contact screens at all. I cancel the setup and get an option to continue and potentially not have access to some features, or exit. I click on exit and a new screen opens with file tabs for email, calendar, address book, and tasks. Looks nice, but there is no data brought forward on any of these tabs, and email looks like it has not been set up (no surprise--no inbox or preview box).

Any ideas on how to complete his setup and bring the data in, or on how to go back to the previous release and uninstall the new version?

Second post trying to figure out what is going on.

I'm getting the notification that I need to update Firefox, so I click the "download" button which takes me to "https://www.mozilla.org/en-US/firefox/new/?reason=manual-update", I select the "Download Firefox" button and after a few seconds I get a "Secure Connection Failed" message.

Usually I can just open Chrome and download the Firefox installer but today I'm getting an error stating that "download.mozilla.org" is using certificates from a different website.

Is the download site busted, or is this just a me issue?

How can I stop Thunderbird from displaying its own advertising/donation page on my browser when I open Thunderbird? It opens this page on my default browser, no matter which is chosen: https://www.thunderbird.net/en-US/thunderbird/128.0/whatsnew/?locale=en-US&version=128.6.1&channel=esr&oldversion=102.8.0 If the browser is not open, it will open it.

This is the result of trying to keep Thunderbird from automatically upgrading. In newer versions, the option to choose not to upgrade has digressed from difficult to not available. It did such an upgrade, so I de-installed and reinstalled my original version, only to have this issue.

I was very satisfied with my old version AND see no need for new any of the "features" or look. And, especially, once such a setting is made, don't want Thunderbird, or any other application or app, changing it back. This is a violation of privacy at best.

Worse yet, Thunderbird is attempting to penalize the customer for making a choice on their own computer by infecting the machine with nuisanceware.

SYS.INFO: • OS Version: Microsoft Windows 10 Professional (x64) Version 22H2 (build 19045.6218) • Processor: Intel(R) Core(TM) i7-6700T CPU @ 2.80GHz, Intel64 Family 6 Model 94 Stepping 3, CPU Count: 8 • Total Physical RAM: 16 GB • Graphics Card: Intel(R) HD Graphics 530, 1024 MB • Hard Drives: C: 476 GB (361 GB Free); D: 664 GB (483 GB Free); P: 267 GB (80 GB Free); S: 1862 GB (1687 GB Free); T: 1863 GB (1687 GB Free); • Motherboard: HP 829E, ver KBC Version 06.29, s/n PGAXV0QNNB7EO6 • System: HP, ver HPQOEM - 0, s/n 8CG8343NN9 • Antivirus: Windows Defender, Enabled and Updated

• Windows 10 Professional (x64) Version 22H2 (build 19045.6218) • Firefox 142.0.1 (64-bit) • Thunderbird 128.10.1esr (64-bit)

======================================

THE ISSUE: When opening Firefox, (Attachment #1 - below) appears. Seems to have nothing to do with any reality . . . as when I check in SETTINGS (Attachment #2 - below). 1. So, who's telling the truth? 2. How do I stop the popup (Attachment #1) from making it's nagging, inaccurate appearance?

Thank you / Nels

Your latest request for donations has evidently come with a forced upgrade which I did not authorise. I have been happily using an older version of TB because it supports my add-ons and themes. Now because of your uninvited intrusion they no longer work. Furthermore it seems that I can no longer download an older version that supports my requirements. NOT HAPPY!

The last version of Thunderbird provides support for logjam patch, which my email service, Spectrum, does not and refuses to support. As I am forced to retain Spectrum, being an apartment service, how can I revert to a prior Thunderbird version that does not support logjam?

Since updating to 141.0 64 bit today (Jul 22, 2025) my addon Filtaquilla is disabled.

I tried another attachment saver and the same thing happened. Okay, I'll revert back to previous version.

Can't do that without starting a new profile.

Sure glad I donated to Thunderbird last night.

1-can I get the newest update WITHOUT THE New Tab layout? Will all new updates automatically have it? 2-WHY DO YOU GUYS PRESUME THAT "ALL FOLKS" really want new looks... 3-IF IT AIN'T BROKE, DON'T FIX IT!!

Could someone please tell me what the latest version of Thunderbird is on the Release Update Channel? I am on version 139.0.2, and when I check for updates in the app, it says that Thunderbird is up-to-date. Is version 140.0 not going to be available on the Release Update Channel?