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Hello,

I need clear instructions for completely disabling/removing Firefox's local profile system from my Firefox installation.

I want to use my Mozilla account only, without having separate Firefox profiles such as “Adina” or “Profile 1”. I do not want Firefox to create, display, or require local profiles, profile selectors, or profile-specific icons.

My current situation is:

• Firefox has created two profiles: “Adina” and “Profile 1”.
• My Mozilla account is the account I want to use.
• I want my Firefox data to remain associated with my Mozilla account.
• I do NOT want to manage separate local Firefox profiles.
• I want Firefox to behave as a single browser connected to my Mozilla account, without the new profile system.

Please tell me exactly how to disable the profile system completely, if this is possible in the current Firefox version. If it is not possible, please explain why and whether there is an official setting or supported configuration that makes Firefox use only my Mozilla account without these additional profiles.

Please do not just tell me how to switch between profiles or set one profile as default. I specifically want to disable/remove the profile system itself.

Thank you.

Hello, I urgently need help recovering emails and archive folders that have disappeared from Thunderbird.

Here is what happened: I had an email account configured in Thunderbird using POP3. Over the years, all the emails and the entire email history were downloaded and stored locally in Thunderbird. I also had several archive folders containing important emails and documents.

The mailbox was recently moved from the old mail server to a new mail server using IMAP. The account was then set up again in Thunderbird as a new IMAP account.

The old POP3 account/configuration was left untouched, because I expected the old emails and folders stored locally in Thunderbird to remain available.

However, after setting up the new IMAP account, I can no longer see the previous email history or the archive folders from the old POP3 account. Some of these folders contain very important documents that I need to recover.

I would like to emphasize that I am not asking to recover emails from the old mail server. The emails and archives had previously been downloaded and stored locally in Thunderbird through the POP3 configuration.

Could you please help me determine, how I can locate and restore the old Thunderbird profile or Local Folders? The emails and archive folders are very important, so I would really appreciate detailed instructions on how to safely recover them. I have not intentionally deleted the old emails or archive folders.

Technical information: Email address: biuro@wojciechprzybylski.pl Old mail server: server.go4win.pl Old account type: POP3 Approximate date of the migration: 15.09,2026 Missing folders/emails: Archiwum

Thank you very much for your help.

Best regards, Halina Kaczyńska

In "choose a profile" I have two profile and they have the same avatar. I would like to change one of the in order to differentiate them. I tried using edit but do not get a choice of avatars as I saw in a help article. What can I do?

Thank you for your help!

Rick

When I try to open a link to an app or program from my Outlook account I get two tabs trying to open the same page. Big load time error. I believe this may be due to having two Mozilla/Firefox accounts and both are trying to open that link. I need to learn how to close one account to keep one open and able to access excess links. I'm open to any reasonable solution that leave me with my history and account info.

Never could Install TBird 152 ... Found Out that Profile Bugs started with Tbird 138... Loaded Tbird 135 To Avoid Profile Bugs... Now I am getting a Strange Error Message ... Now I am getting a strange Nuisance Prompt Says I need to Create New Profile .

I had two profiles set up in Firefox that are not showing up now after restarting my computer. One I have been using for YEARS. I have hundreds of bookmarked pages and saved passwords that I cannot access now. I also have a second business account that is not showing up anywhere and I need for an extremely important meeting in a half hour. This is disastrous and I do not understand why your browser did this.

My bank had me reinstall firefox. NOW I keep getting messages to create a new user because it shows I have previously logged in on a more recent version. I had used a version of 60 something and now I have something in the 40's (140.16.0 .Windows 11) I really hesitate to change users because I do not have a clear picture of what I will lose. Like bookmarks and saved stuff.

I would like to just stop the messages.

I've been using Firefox for the past few months, and I've noticed a strange issue that happens occasionally when I launch the browser. It's almost like Firefox partially resets itself. My extensions are still installed, but they stooped working and their stored sign-in info like in Bitwarden or Raindrop.io is gone. I have to go into the Extensions settings, disable them, and then enable them again to get them working. For example, I use a Speed Dial extension. After one of these sudden resets, my homepage is still set to the Speed Dial page, but it just shows a blank page. I have to go to the extension settings, disable the extension, and enable it again before it works.

Some of my Firefox UI settings also revert to their defaults. For example: - The bookmarks bar, which I have set to never show, appears again. - The sidebar, which I moved to the right side, moves back to the left. - Other UI elements and customization are also reset to their default states.

I'm not entirely sure what triggers this. I think it happened once after a Firefox update, but the next time it happened there was no update involved. Has anyone experienced something similar? What could be causing this, and is there a way to prevent it from happening again?

Essentially, I want to back up my Thunderbird. The standard way seems to be via Export / Import, but there is an implied limit of 2GB. The export function has successfully ended and produced a file of 15GB. Can I rely on this? (In the sense of being able to Import it should I need to?

Thanks in advance for any help / advice you can give.

Hi I am an older person and have lost my profiles on thunderbird email - one is [redacted]@xtra.co.nz and the other is [redacted]@xtra.co.nz. We are in NZ and accidently deleted the Thunderbird profile and not the corrupted new profile I was setting up. Thank you. Gloria Sandbrook. I still have [redacted]@xtra.co.nz on my phone for communication. Cheers.

I have posted another question about my corrupted TB profile and restoring it. Having done the restore and looked through the profile folder it is clear that this is full of old files that are no longer supported/needed.

Is there a utility that removes these old files?

I'm not sure if TB updates should remove them but it doesn't appear to have done so.

When I read https://kb.mozillazine.org/Files_and_folders_in_the_profile_-_Thunderbird it is clear that there are so many of these that doing it manually would be prone to error. That resource also says it does not know what some of the files actually do.

Is there a better resource that lists just the latest files maintained by Mozilla?

If I do a new export does it only export the files it needs? The last time I ran an export the resulting zip did not contain all the files from the TB installation but I have no idea why.

I have copied Thunderbird folder from C:users\maris\AppData\roaming on old PC. Had it working on the new PC, but it suffered an unrecoverable error during a windows update after only five days. Other reinstalled apps now running OK, but have been unable to replicate the successful installation from a few days ago. Found additional profiles in profiles.ini and deleted them. Made no difference!

I have moved my Thunderbird data from drive C:\xxx\Thunderbird to N:\xxx\Thunderbird. The Thunderbird program remains on "C:\Program Files\Mozilla Thunderbird" How do I tell Thunderbird to find its data on the N: drive?

     Thank you,    Art Lieberman

I am using Thunderbird 140.15.0esr and have noticed that my Ashampoo Backup is not able to store my Thunderbirs files any more. I have looked up how to find the Thunderbird files and the posts mainly say :

C:\Users\<YourUsername>\AppData\Roaming\Thunderbird\Profiles\

But when I follow this path there is no Thunderbird folder in Roaming as shown in the attached screen shot

Can you help please.

Ian Hulley

I have an email account that I have had for several years and I run it under Thunderbird. I have recently opened a Gmail account and understand that I can operate this under the same Thunderbird (I haven't tried it yet so expect a few glitches on the way, as per usual! There are plenty of articles covering this, so I live in hope)! Potential problem is: I have backed up my old profile account regularly and know how to do it (though I've not yet had to restore it and of course hope I never will), What worries me is that if I follow the procedure to add Gmail to my Thunderbird (and it works), will I get a single profile covering both email accounts which I will be able to back up in the way I am used to; or will I get 2 profiles including a new one for Gmail so I will need to back up both? A simple question but I haven't seen the answer anywhere yet!

John Wilson (john @wilson48.plus.com)