Zonke iiMveliso Community Forum

I have long had an ESR version (140.1.1) on my Win11, for which I had selected all the defaults from the installer around a year ago.

I followed [instructions] to migrate to the Release version (141.0).

I imported the same profile as that exported by the ESR version.

ISSUE: Now I have 2 separate installations of Thunderbird as shown in Windows "Apps" panel, the old and the new one. Both are 64 bit. Each holds its' own versions of my folders and synchronizes separately.

QUESTION: What's the best way to resolve this? I only want the Release version, but fear a process (that I imagine on my own) which will damage one or both. Such is my luck with these matters.

Thanks in advance, AL

I get an error message when updating "failed to check for updates". I think I've been stuck on version 128.11 64-bit for several weeks now. This is on a PC with Windows 11 Pro.

I didn't knowingly install MSN and yet it showed up and started replacing my screen that comes up after a sleep session on my computer. I have no respect for MSN and never want to see it. I have Windows 10 with Firefox. Microsoft Edge also seems to have opened without invitation.

I looked at the system requirements page at https://www.mozilla.org/en-US/firefox/141.0/system-requirements/ . For Windows devices, the operating systems supported are listed as "Windows 10 or later".

In October 2025, Microsoft officially stops providing feature and security updates for Windows 10. However, they offer consumers and businesses the option of enrolling in 1-year, 2-year, and 3-year subscriptions for Windows 10 devices which will provide another 1-year, 2-years, and 3-years of additional security updates. You can read more about this at https://learn.microsoft.com/en-us/windows/whats-new/extended-security-updates

For those individuals and businesses who will be enrolling devices into the Windows 10 ESU program, will Mozilla continue to support Firefox on Windows 10 after October 2025, at least for those receiving security updates through Microsoft subscriptions? Or at that point will Mozilla consider Windows 11 to be the only supported Windows operating system?

Thank you!

After some update somewhere and/or replacement phone change, I cannot connect to the wireless internet thru phone unless the WiFi is on, but when out of range away from WiFi the web page shows Address Not Found or Unable To Connect. Cannot find answers by searching. Thank You

Hallo und guten Tag, auf meinem Desktop habe ich seit einigen Tagen einen neuen Ordner mit der Bezeichnung - Alte Firefox-Daten - . Ich kann den Ordner leider nicht löschen. Alle Versuche sind bisher gescheitert.

Habe Mozilla Firefox schon 2-mal deinstalliert etc. Der besagte Ordner lässt sich trotzdem nicht löschen.

Angeblich wegen fehlender Berechtigung. Was kann ich machen?

Mit freundlichen Grüßen

Hermann Wieschebrock

We've got around 2000 AD-joined windows 10 boxes, with TB as the mail client, for years. Users are connected as domain users (ie, non-admins). Now IIRC, first TB version installed was 60. TB was updated throughout the years automaticall without a hitch, up to and including version 115.x.

With the advent of 128 we had started receiving calls from users stating that a message pops-up asking for credentials. Taking a closer look we discovered that each and every installation needed admin credentials to be able to do the upgrade to 128.

Is this a bug or normal behaviour? It is definitely a problem, especially for small organizations that do not know how to install manually an MSI of the latest version.

The first problem cropped up immediately: Thunderbird has done a pretty good job for years of recognizing my email preferences for Inbox, Trash and Junk; now it no longer delivers email to my Inbox or Trash at startup. Almost all of my email goes to the Junk folder, including that from whitelisted senders. All of my individual spam filters and my whitelist are set to act when email is received, but I have to run the whitelist manually to get it to work (sometimes more than once). The only way I can get things into the Trash folder is to put them there manually, as TB apparently has forgotten everything it learned about my email preferences. I did take the opportunity to update my Whitelist (though to no avail), so I guess I'm sort of glad that I was goaded into doing so. But it hasn't helped.

As of tonight, I can't write or reply to an email or edit an email draft because TB locks up while it is "Copying messages to Drafts..." I've had to close TB ten or twelve times, and I've not been given the opportunity to make a bug comment during the closing routine.

I have emptied the TB cache in hopes that doing so would clear up these issues. Though that works well in Firefox, it didn't help with these problems.

I also am not too happy about the disappearance of the File Edit ... folder bar and its being replaced with a hamburger drop-down menu at the upper right, but at least it will suffice once I've unlearned almost thirty years of doing things a certain way.

I really don't want to stop using Thunderbird. I like the program, and I'd hate to have wasted the two solid weeks it took to get Yahoo! Mail to acknowledge its existence and let me connect to their service, which I did under duress. Not that I'm a masochist or anything.

Windows 11 Ver. 24H2 (OS Build 26.100.4351) Thunderbird Ver. 139.0.2 (64-bit) HP something-or-other tower computer, vintage 2021

Hi everyone

I used Refresh Firefox option and it created "Old Firefox Data" folder on my desktop.

Awesome stuff. Sadly I cant get rid of it, here is why:

1. At first it said that the folder is used by another program and I cant delete it because of that. Cool, I decided to uninstall Firefox and make a clean install, so I have space to delete the folder too.

2. Long story short, it didnt work. I removed Firefox and tried to delete that folder, but wait for it, yeah I cant because I need permission from MYSELF. Awesome stuff.

3. I decided to use safe mode, so I used run command to run msconfig and I changed it to boot in to safe mode. But wait for it! YES! Its bugged and I cant login in safe mode, because pin is useless and it doesnt give me option to use password, so after hour of various things I got back to my normal mode via CMD commands. THANK YOU MICROSOFT.

4. So now Im stuck with the lovely "Old Firefox Data" folder, which cant be removed normally, neither in safe mode and wait for it! NEITHER WITH ADMIN CMD, not even the takeown /f "Old Firefox Data" /r command. THANK YOU MOZILLA!

So is there someone knowledgeable enough to help me to get rid of that folder pretty please? Like really a lot please.

I accidentally downloaded firefox twice, and I can't find where to delete the one I don't need, it's not allowing me to use the start button to change users or anything else. I would like to know how to delete the one firefox browser, I can't get into the area where I can add or delete anything, without being able to use the start button to navigate anywhere. I think I just need to get rid of the second firefox, my troubles started when I downloaded the second one. thanks

I made a mistake. I had 128 and went up to 140. It pretty much looks the same, but a big difference is an extension I always use says it will not work with 140. I don't care how good 140 might be; if I can't use my app, QUICKTEXT, then I don't need this. How do I go back to 128 or to a version that works with my extension?