Все продукты: форум сообщества

I am having trouble moving Thunderbird data from one computer to another. The first computer is Windows 10 32-bit that has been running T-Bird 140.3.0esr for several years. The second is Windows 11 64-bit running T-Bird's latest version. I tried both procedures cited in the Mozilla article at https://support.mozilla.org/en-US/kb/moving-thunderbird-data-to-a-new-computer.

I first did the 2nd method cited -- Win 10 to Win 11. It worked but the new computer is missing Local Folders and contacts organized as groups.

I then did the 1st procedure cited, using copy and paste commands. It did not work at all and now T-Bird will not load. I get this message: "Your Thunderbird profile cannot be loaded. It may be missing or inaccessible."

So, different operating systems with different bit specs and different T-Bird versions.

I thought of updating the Win 10 computer to T-Bird's current version and then doing the Win-10-to-Win-11 copy/move procedure but thought it best to ask here first. Thanks for any help.

I have a folder/subfolder, Old Firefox Data/ukn05f6l.default-release, on my desktop created 11/30/2024.

Any ideas what it is? It is huge...940mb.

Can I delete it?

Thanks

HELP!!

I am trying to move my Thunderbird profile (containing a huge number of mail files dating back to 1995!!) from a Windows 10 computer to a new Windows 11 computer. My active profile has been kept in my Documents file (for easier automatic cloud backup). I have spent days trying everything I can to make this work. The best I can do is two profiles, one that can check mail, but contains no historic mail or files -- the other that has all my emails but won't connect with my server. "The following is a special account." "There are no identities associated with it." I was wondering if I could merge these two profiles? Or?

Any assistance will be greatly appreciated!!!!!!!!

Hello, Mozilla community.

I am trying to configure a Firefox ESR installation so that every new user on a computer automatically receives a visual customization (a logo change on about:home) through userChrome.css and userContent.css files.

My goal is to do this without using Group Policy (GPO) or logon scripts, by only modifying the files in the Firefox installation folder.

Environment:

Firefox Version: Firefox ESR 140.3.0esr

Operating System: Windows 11 Pro

Context: Standalone machine, managed without Active Directory.

My Question:

Is this method of deploying a default profile via installation files (defaults/profile or distribution.ini) still supported in recent versions of Firefox ESR?

Is there an additional step or configuration I am missing for Firefox to recognize and use the bundled profile when creating a user's first profile?

Is there any policy in policies.json that could be interfering or that is required to enable this behavior?

Thank you very much for your help and your time.

How can I transfer my bookmarks to the new version of Firefox. The bookmarks are still available from the drop-down top bar "bookmarks" but they don't show on the Firefox page. I don't know how to get to the "about:profiles" page to change back to the profile that shows my bookmarks toolbar.

I have 4 yahoo accounts. Whenever emails come in to my main yahoo account inbox they also appear in one of the other yahoo inboxes. The remaining 2 yahoo accounts are not affected in this (or any other) way.

Note that I just reconfigured Tbird in (what I believe is) a non-standard way. Before I implemented this fix, every time I opened it, Tbird crashed within 15 seconds. Figuring that my profile was probably corrupt beyond repair I switched to an earlier profile which seemed to be stable and then updated that profile by copying and pasting (replacing) all the contents of the "ImapMail" and "Mail" folders from the more recent corrupt profile into the older stable profile. Not sure whether that has caused this duplication error.

Any advice appreciated.

Thanks.

I had to disconnect my computer and move it to a new location. When I hooked it back up and tried to open my Thunderbird email I got a message that said "Your Thunderbird profile cannot be loaded. It may be missing or inaccessible." When I went into my Downloads folder and tried to reload the application I got the same message. Help!

Hi,

I try to restore a profile folder (Thunderbird 141 windows).

I use Import procedure from Thunderbird (same effects with ImportExportNG plugin).

I select the folder including profile, successfull. All account and folders, emails are OK.

After restarting Thunderbird, all accounts are listed, but some are empty (IMAP) : folders and emails gone, and they where all perfectly restored before the restart.

I try to switch to "offline mode" (perhaps a sync with server needed despite ?).

(other request suppport related : https://support.mozilla.org/en-US/questions/1428421 ).

Thanks.

I just update firefox but all my none of my bookmarks loaded. I share my computer with my husband. He has a different account on this same computer and his bookmarks are showing up on my side, but mine are nowhere to be found. Previously we have had separate bookmark lists and all was fine. I don't know where my bookmarks went.

How do I get them back and put on "my side" and still have my husband's on his side?

I have created a new IMAP account where previously I had a POP3 account. The IMAP acct now fetches email from the same GoDaddy server account as the POP3 account used. I want to continue using the same Local Folders location as before, in order to maintain and update the large amount of selectively retained email permanently stored there.

Previously with POP3, I had redirected Local Folders from the default location on the C: drive to a different location (K:\...\Thunderbird\Local Folders) on a data drive. Under Account Settings > Local Folders, Thunderbird still points to the desired data drive directory (K:\...\Thunderbird\Local Folders). Does this mean that the new IMAP account will also use the redirected Local Folders location or will it use the Default location on the C: drive listed after creating the IMAP account? I ask because under Account Settings > Server Settings for the IMAP Mail Server, the "Local Directory" entry points to C:\Users\MCM\AppData\Roaming\Thunderbird\Profiles\......

Perhaps the "Local Directory" is not related to the "Local Folders" location?

Thank you for helping with this somewhat confusing situation.

Michael M.

I'm trying to copy an older Thunderbird profile so i can add it to my Thunderbird installation on a new computer (where I already have a profile and a bunch of mail). When I copy it, near the end of the copy process I get this strange message: "Replace the file 'Inbox.msf"? An older file with the same name already exists in 'mail.cyberacc.net'.

Original file: 143.3 kB. Last modified 2014-08-22 12:57:00 Replace with 122.2 kB. Last modified 2014-08-23 23:08:25

Curiously, no accounts from mail.cyberacc.net show up in my accounts sidebar. Under 'Account Management' it shows as 'XMPP - nn@cyberacc.net'

How can two files with the same name but different dates exist in the profile? What should I do in response to this prompt? Cancel? Skip? Replace?

Thanks

Copying from Lenovo x120e running Fedora 24 and Thunderbird 52.2.1 (64bit) Want to add to Thunderbird 128.13.0esr (64-bit) on Dell XPS 9315 running Fedora 42 Workstation Edition

I have followed the instruction https://support.mozilla.org/de/kb/Benutzerprofile-Thunderbird#w_ein-profil-sichern to shift my profile from one harddrive to an other on my PC

The original profile is still on the old location %APPDATA%/Thunderbird I have updatet profiles.ini pointing to the new location At first glance it seemed to work Thunderbird was starting and when I cloesd it the date of files in the new location changed. But when I renamed the old profile in the old location Thunderbird does not start correctly and I only get

   <menuitem id="folderPaneContext-getMessages"
</pre>
^
If I rename the old profiles again to the original names, it starts without any issues

I updated Thunderbird without backing up my profile. All my contacts and emails not currently in my inbox appear to be .... gone :( Please help - can they be recovered? I've got a lot of brain fog and need clear instructions.

Recently, I accidently upgraded my Win10 Home to Win11 Home. It didn't work at all, so I tried to recover my original C:\ drive with Acronis True Image 2021. That did NOT work, so I was forced to Install everything anew. Since years hence, I have my Thunderbird profile, and all my emails (some 9 GB in size), stored on a separate HDD. In my experience, MS will always just screw up the C:\ drive, and not affect other HDD's. Learned that the hard way. The profile is still safe and undisturbed on that other HDD, but I can't seem to be able to access it. It holds some important info there, like my addressbook, and licensenumbers. I am including some pics: The 'Appdata' and the 2 '.inifiles' are from the C:\ drive; the 'marked entry' is from the other HDD. It seems I have been here before: I just found a 'memo to self' pointing out that the dates of the file(s) are important.... Must have been years ago (and I'm not getting younger). Thanks on beforehand.

macOS 15.5, TB 141. By design, when one "Removes" a profile without deleting the data, the profile no longer appears in Profile Manager, but it is still in the profile folder. Thus, is it safe to manually delete a "removed" profile if one later decides it is not needed?

Thank you.

MacOS 15.5. I’m running ver 128 ESR. I want to update to ver 141 Release.

I made certain that I have a backup of my current profile. Then I downloaded the 141 dmg and copied the application into a subfolder (called Internet) in /Applications, which is where verion 128 resides.

I opened version 141, and was presented with a window asking me to perform a complete, new setup. Why doesn’t version 141 find my (ver 128) default profile, which is named xxxxxx.default?

I quit version 141 without performing the Setup. There are no new files in my profile folder (and version 128 seems to be working normally).

Thank you.

Hello,

Windows 11 OS / PC

Basically I have Thunderbird installed on my second hard drive. I had several folders of different programs in that drive. I was basically trying to clean up those folders, so I made a folder called programs, and was dragging program files into that folder.

I dragged the whole Thunderbird folder into that new folder. That was where my issue started. After that, the desktop shortcut I had for it wouldn't work. Ok, easy, I went to the Thunderbird folder, found its .exe and voila, made new shortcut.

When I opened that up, it was basically like a new install, asking me to set up username/password pop/smtp etc. I'm decently ok at this, and I know that your Thunderbird profile can just be put in and it will pull everything back up the way it was, only, it's not.

When I looked in the AppData profile area for Thunderbird, it had a profile that was listed at 6:53, 7/22/2025 the exact time I moved the whole folder, and created the new shortcut...

So, my question is, how screwed am I? When I built my PC, I imported the Thunderbird profile over from the old computer to the new one. This was on 12/31/2023. So now, I see no other profiles but from 2023, and from the screwup date, today 7/22/2025.

I should also mention I tried messing with Thunderbird again later this evening, and it made another profile, 10:30 7/22/2025. I knew this wasn't right, and deleted it. So now, when I click on the Thunderbird shortcut, it says profile cannot load Thunderbird, profile is missing / inaccessible. So, Thunderbird won't even load up.

I'm wary of doing a fresh install, as I'm thinking there should be a profile dated between 12/31/2023 and today 7/22/2025, and I don't want a new install to wipe everything if the correct profile is hiding in there somewhere.

If I somehow figure out how to get the main program working again, please tell me the current data from Thunderbird before moving the folder is stored on that original 12/31/2023 profile. I really really really hope the correct and current profile wasn't wiped out when I moved the folder.

Is there a way to do a Windows restore to get it back if it is truly gone? If it is not truly gone, is it still the 12/31/2023 profile (Thunderbird just updates that original profile and keeps the original date that was transferred to the new computer)? If not, how can I find the current one I had before moving the folder? And how can I get Thunderbird to load using that profile?

Thank you for taking time to read this, and if you can help me get my Thunderbird back, you are a God among mortals!