Gach Táirge Community Forum

I really don't need a profile in Firefox and if I delete the profiles listed, you will wipe out all my bookmarks/settings. Why do I need to see a yellow triangle on the Firefox app icon?

06 May 2026 USA Just to inform users:

All mailboxes and all mail in profile are catastrophically and irretrievably deleted when I: 1. Change the location of the profile folder. 2. Make appropriate change in profiles.ini reflecting the location change. 3. Launch Thunderbird in Offline Mode (launching in OFFLINE mode is the fatal event). 4. Mailboxes will appear during this one launched session

    but

5. If Thunderbird is closed while still OFFLINE, then a re-launch of Thunderbird in any state will reveal

     that all mailboxes and all mail have been deleted.

All mailboxes, and of course, all mail in the profile are catastrophically and irretrievably deleted. I was lucky that I made a backup before changing profile location.

The deletion of mail and mailboxes occur at the close of Thunderbird's OFFLINE state. An examination of the profile folder indicates the destruction has occurred upon closing of Thunderbird in OFFLINE state.

It is not the re-launch of Thunderbird that causes the catastrophic deletion. The deletion occurred when Thunderbird was closed in its OFFLINE state.

To successfully change the profile location I must: 1. Make the change to profile location. 2. Make the appropriate change to profiles.ini 3. BE SURE to make the FIRST LAUNCH of Thunderbird in ONLINE mode--ONLINE only. 4. Once 1,2,3 are done, then Thunderbird does not corrupt the profile folder.

Conditions that MIGHT make my configuration uniquely affected: 1. I use Proton Mail Bridge in conjunction with Thunderbird. 2. My Profile folder is on a network share that is letter-mapped in Windows. 3. I have about 10 email addresses in Thunderbird that are Outlook IMAP, Gmail IMAP, and of course, Proton Mail.

I've been using Thunderbird a couple of years in this configuration with no problems. I just decided to rename my profile. So, this is my first discovery of the problem.

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?

My Thunderbird was working fine today, all messages received, could send/receive email and all parts of my profile that I had set up (ie custom archive folders) were present and had emails.. I did a Windows update and when I reopened Thunderbird there was a pop up prompting me to login to my yahoo email. I did so and now everything is gone, all folders are empty - no emails and none of the unique folders I had created. The only thing that I can tell is still present is my address book. I am also unable to send or receive emails. When I try to send an email (to myself or anyone else) I get a pop-up "The mail server responded: Request failed; Mailbox unavailable. Please verify that your email address is correct in your account settings." I checked and the email listed is correct, the one I have been using my entire life. I also checked my Server Settings and they appear to be correct. (I have a cox.net email address which I transitioned to yahoo several years ago as instructed by Cox, as Cox no longer supports email - everything has been working perfectly until today) I also see there was a Thunderbird update done at 5:53PM today which would have been the same time I did the windows update (Thunderbird 153.0.3esr). I sent an email to myself from my yahoo website email and it never arrived in my Thunderbird Inbox but it DOES show in my Thunderbird "Sent" folder. I do have a Thunderbird backup ZIP file but unfortunately it is about a year old so obviously won't have some stuff I would not like to lose. Thoughts?????

I have a problem with the browser automatically starting when I start my PC. I have this feature disabled (!) ("Open Firefox automatically when your computer starts up" turned OFF) Everything was fine, but then I started using the "profiles" feature - browser start's to open automatically when i start up my pc.

when I created a new profile (in addition to the main one). The problem appeared, and that was a long time ago (at least half of year ago it was already as now). I hoped that it would be fixed and didn't write to support. Windows and the browser itself have been updated several times since then - this did not help.

Changing the settings in different profiles, creating / deleting them, and other basic actions did not help. What happens is that the browser ALWAYS opens when I start the PC (Profile selection tab, i have turned ON "Select profile when Firefox start up")

I tried turn off \ delete all plugins, turn on\turn off almost every default setting, no effect. What should i do?

Browser version - 150.0 (64-bit) (from "settings-about firefox") Windows 11 Pro 25H2

Currently have 4 profiles in Firefox - but problem appeared after creation on 2nd profile. "Open Firefox automatically when your computer starts up" turned off in every profile.

I already signed in with my account, but it still pop up this:"

fire fox keep pop me this: This profile was last used with a newer version of this application. Please create a new profile.

Help! I updated my account to a new email months ago. I have been trying to set up a new different profile. Copying a profile or trying to add a profile adds the newly made profile to my old email address instead of my new email address. In the new profiles created, I am unable to login to my new email and password.

I'm trying to understand Profiles, especially since I am transitioning to a new laptop.

On my older machine, I have an Original Profile. Since I've never specifically created a profile, I assume that Original Profile contains my current Settings, Bookmarks, etc. Is that a correct assumption?

My new machine also has an Original Profile. Do I need to copy my Original Profile from my older machine to the newer machine? Should I rename the profile on the new machine or leave it as Original Profile?

My wife and I both have Thunderbird accounts. The issue is that when we open Thunderbird, both accounts show on one screen. Is there any way to separate logins and only show each of our accounts on the screen?

Thanks, Sam Orner

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.

When I try to browse or download another copy, the error message "Your Firefox profile cannot be loaded. It may be missing or inaccessible" appears.

How do I fix this?

Thanks

Hi, When I click on the profile icon in the top right, I can no longer edit one of my profiles ("School"). I can still open it, bookmarks/passwords are still there, but I have to log back into everything and in the School profile, I can't switch back to "Personal" by clicking on the profile icon like normal.

I'm on Windows, and yesterday was showing something on my laptop to a mac user. They kept right clicking or something, and some tabs greyed out before I had to just close firefox. When I opened it again later using the "School" profile shortcut on my desktop, it opened a blank/new page. I was able to sign back into the account since I have sync on, so my passwords/bookmarks/etc are there, but I can't edit it any longer and can't make a new profile shortcut for my desktop. And when I open Firefox from my taskbar, it automatically opens my Personal profile instead of letting me choose which. Any ideas on what might have gone wrong & how I can fix it? Thank you!

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

I used Firefox this morning and it worked normal. This evening however it will not open as normal. It appears to want me to create a new profile. It does not have a toolbar or any of my bookmarks What do I need to do to restore

Some day not so long ago, while I was busy with something else, something happened and I was asked to choose or create a profile. Since then nothing seems to be as I am used to during several years of Mozilla Firefox use, so I want to ask where have all my bookmarks and passwords gone? If it's because of the introduction of something called AI, then please let me rely on my own I. I don't trust the "A" version!

Klaus BB

When I try to edit a profile (name, color theme), about:editprofile returns a blank page.

It was working just a few minutes ago, but stopped while I was trying to select a new theme.

I've restarted the browser a couple of times and looked at help articles but cannot figure out how to fix it.

Yesterday I was having trouble sending emails from one of my email accounts. I had not fixed that when I shut down for the night. Today when I turned my computer on, both my email accounts and my address book was gone