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Until I close the following message that appears on Firefox Screen other apps are slow or won't open.

Box with Red X - This profile was last used with a newer version of this application. Please create a new profile. OK

I followed the directions to CREATE A NEW FIREFOX PROFILE.... ,, created as Personal #1 & Personal #2 perhaps I did something wrong......Help!!!!

I have been using Mozilla Thunderbird for many years without any issues.

A few minutes ago, I used Thunderbird as usual and then closed it. When I tried to open it again, it would not respond. I restarted my Windows 11 laptop, but after rebooting, Thunderbird opened as if it were a fresh installation. None of my email accounts, settings, or data are there.

I signed in to one of my email accounts, hoping Thunderbird would automatically recover my previous accounts and settings, but nothing happened.

I am using Windows 11 and Thunderbird version 140.13.0 (64-bit).

Could you please help me recover my existing Thunderbird profile, email accounts, and data? I would greatly appreciate your assistance.

Thank you.

Hello,

I need help recovering my old emails from Thunderbird.

I am using a POP account. Recently, I changed the message storage location from the C: drive to the F: drive. After doing this, Thunderbird only shows recent emails, while my old emails are missing.

Here is what I have checked:

The mailbox files still exist on the F: drive. Inbox file: approximately 1.1 GB Sent file: approximately 1.18 GB I also have a complete Thunderbird profile backup of approximately 2.73 GB. The profile contains prefs.js, the Mail folder, and all profile files. Some account folders such as: pop.accessarchitects.in pop.accessarchitects-1.in pop.accessarchitects-2.in have Inbox files that are 0 KB. However, another mailbox file named Inbox is about 1.1 GB, which appears to contain my old messages. Thunderbird downloads and displays new emails correctly, but it does not display the old emails. I previously had around 60,000+ emails organised into many custom folders such as Contracts, Bills, Axis Bank Statements, Notifications, etc. Some mailbox files still have large sizes, but Thunderbird does not display their contents. My folder structure F:\Mails\

   Inbox (1.1 GB)
   Sent (1.18 GB)
   Inbox.sbd
   Local Folders.sbd

Inside Local Folders.sbd, I also have mailbox files such as:

Inbox (~642 MB) contract & bill (~778 MB)

The data appears to exist, but Thunderbird is not recognising or indexing it.

My Questions How can I reconnect these existing mailbox files without losing any data? Is there a way to rebuild the indexes so Thunderbird recognises the old messages? Could the issue be caused by an incorrect profile mapping after changing the storage location?

I have not deleted the original mailbox files, and I have a complete profile backup available.

Any help would be greatly appreciated.

Thank you.

Hello

I use Thunderbird for many years, I have a profile weighing 3,6 GB now… I already moved this profile on my old computer, from default location to a data disk. Now I needed to move it to a new computer, so I moved it to my Dropbox (with local storage on both), to conveniently access it from the new machine, and to have some kind of backup (with a real backup, more occasional, of course). I don't plan to launch Thunderbird from both computers, so there should be no conflict.

I installed a fresh new download of Thunderbird (152), which I just upgraded to 153. The new computer runs Windows 11 Professional (build 26200.8875), has 32 GB of memory and a large amount of free disk space.

My profile.ini file currently looks like: ``` [Install734AE0B000379192] Default=C:\Dropbox\Applications\Thunderbird\0q9jw2nn.default Locked=1

[Profile1] Name=default IsRelative=1 Path=Profiles/ncc2rvps.default

[Profile0] Name=default-release IsRelative=0 Path=Profiles/30jrlwud.default-release

[General] StartWithLastProfile=0 Version=2

[Profile2] Name=PhiLho IsRelative=0 Path=C:\Dropbox\Applications\Thunderbird\0q9jw2nn.default Default=1 ``` Profile 0 and 1 were created at installation time. I added the Profile2 and I set StartWithLastProfile to 0 to ensure the profile manager sees the profile.

When I start Thunderbird, after choosing the PhiLho profile, I end up with an empty window: no accounts, no messages, no folders, etc. I see no relevant error in the developer console, or the logs. What I am missing?

Why do I continue to receive a message from Firefox after creating a New Profile?

Firefox This profile was last used with a newer version of this application. Please create a new profile. OK

A new profile PERSONAL #2 was created following the Steps to Create a New Firefox Profile.

What did I do wrong? how to correct, so that I stop receiving the error message?

Good morning,

I’m reaching out because I’m having trouble with my Thunderbird email and need some assistance.

I was using Thunderbird without any issues before, but now all my old emails have disappeared. I can still receive new messages, but I’m unable to send emails like I used to. I also can’t recover or view any of my previous emails.

It seems like something may have reset or become corrupted, and I’m not sure how to restore my old messages or fix the sending issue.

Could you please help me get Thunderbird working properly again and recover my old emails if possible?

Thank you for your support.

Dee

When I try to login with my Firefox account to configure Sync, I get a message that says that I am logged on to a different profile and asks if I want to switch. If I switch, I get the same result with the other profile. There is only one profile folder in the Profiles directory, there are no other files or folders. What should I do?

As explained in the subject line - title, I do NOT need nor use the Today Pane.

It use taking up needed space for the down arrow & popping up distracting me.

How do I eliminate it? I will even, if necessary edit Thunderbird to get rid of it.

'AND bold text' somehow, a new version of Thunderbird was created - downloaded and all my passwords AND bookmarks are gone. I looked for the profile, but it's new so does not contain passwords NOR bookmarks.

THANKS! Remain WELL & be SAFE!

Robin

is there any way to perform a dynamic backup of Thunderbird. By that I mean a regular (e.g. daily) backup of the profile or at least the mailboxes using a scheduler without closing Thunderbird down?

I created a new profile on my account. Whenever I am in the original profile, I can click on the new profile and it will open a new window with a new icon. However, I notice that under the new profile, it is not signed in. When I try to sign in, I get an error that says

Account already in use xxx@gmail.com is already signed in to the “original” profile

You can only associate this account with one profile on this computer.

Then it forces me to switch back to the original profile. This tells me that the profile is not syncing for access across devices.

This is happening on my macbook.

First, I have very limited understanding of software. I need very simple explanations.

Here's my issue. I use Thunderbird on my desktop computer. I have used the Import/Export > Options > Backup Scheduling function to backup my Thunderbird email to my USB/flash drive. I have labelled the backup folder on my flash drive "Thunderbird email backup." That folder contains numerous subfolders including: 1) calendar-data 2) chrome_debugger_profile 3) crashes 4) datareporting 5) extensions 6) ExternalMailFolders 7) Mail 8) minidumps 9) saved-telemetry-pings 10) scheduled-notifications 11) settings 12) shader-cache 13) storage.

Again, these are the subfolders created/named by the Thunderbird Import/Export backup. I HAVE NO IDEA WHAT THESE FOLDERS MEAN.

Here's what I want - it's actually very simple. I want to be able to see (read) my backed up email on my flash drive without using the Thunderbird installed on my computer. I want complete interaction with the backed up email without my desktop Thunderbird - or my online email account - being involved at all.

My understanding is that Thunderbird Portable is supposed to be able to allow me to do that. I downloaded Thunderbird Portable (from https://portableapps.com) to my flash drive but when I tried to access it the first thing it did was try to force me to put in my online account (POP?) information.

I don't want to do that. I just want to open Thunderbird Portable on the flash drive and have it realize that all of my backed up Thunderbird email information is right there in the same flash drive. I want it to just access and use what's right there.

I was really hoping that Thunderbird Portable would simply ask me where to look - in a very user-friendly way! - and I could tell it to go to my "Thunderbird email backup" folder on my flash drive (WHERE ALL MY THUNDERBIRD INFO IS!) and it would simply do just that and provide me with complete Thunderbird service for the backed up email.

Am I missing something? Can someone give me a VERY SIMPLE walk through to do what I would think should be a very simple thing? Thank you. Chris (6/29/26)

PS - I've read the Mozilla Support ARTICLE: Thunderbird Portable (Mozilla Thunderbird, Portable Edition) and other portable apps as alternatives (https://support.mozilla.org/en-US/questions/1285834) and it alludes in general terms to exactly what I want to do but it does not give any step-wise instructions.