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I'm trying to transfer the Profile folder from my current laptop to my new one. I followed the directions here: https://support.mozilla.org/en-US/kb/moving-thunderbird-data-to-a-new-computer but must've made a mistake because none of my many Local folders have populated Thunderbird in the new laptop. Also, the GB size, number of files and number of folders show to be very different on the new laptop vs. the current one.

I'm inclined to just start over but have a question. Can I simply delete the contents of the "Thunderbird" folder under "Roaming" in my new laptop and try again to paste into it? Or are there some items in that folder that were inserted when I first downloaded TB into my new laptop so that doing a complete deletion would remove those and they wouldn't be replaced when I try pasting again? If so, how do I get around that?

Thanks very much for your help.

Fire Fox - This profile was last used with a newer version of this App - Create a new profile.

After logging into my account, I saw a Fire Fox page showing new features. Upon downloading Fire Fox, I saw the the above message. I didn't want a new profile, but there wasn't an option to close the window and to just continue to use the newer version that was already installed ???

I tried Control / ALT / Delete . Upon restarting it showed the same message! I uninstalled Fire Fox, which surely has not helped things.

Am I able to restore the profile from the "newer version"? Otherwise, I will probably have to setup Fire Fox from scratch and have lost all bookmarks.

Thanks so much for your assistance. Myles

I'm running Firefox 122.0.1 on a Windows 10 desktop PC, with a profile which includes a userChrome.css file which makes several layout and cosmetic changes.

I also have a laptop (also Windows 10) which has an old Firefox 97.0.1 installation, and I'd like to make the same changes on this machine which I'm used to on the main computer. I copied my desktop profile to the laptop, to the same directory as its present profile, but when I rebooted Firefox the transferred profile wasn't recognised.

While doing the transfer I received error messages about some of the folders: Destination path too long. This despite the fact that the registry flag to accept extended paths is set to 1. I had to skip several folders in order to complete the transfer.

Could this be the reason why the new profile isn't being picked up? Or is it because the two Firefoxes are of different versions?

I'd be grateful for any thoughts. Many thanks.

I got a Firefox update recently and have not been able to access Flickr since then. I am getting a message that the page is not redirecting correctly. I am attaching the error message. I am running with standard firefox protection. I have cleared cache and cookies. I have also added Flickr as an exception to Firefox enhanced privacy tracking. Firefox is up to date (version 134.0.1 (64 bit)). Anyone else having this issue or know the solution?

So I have a bunch of Firefox profiles I want to set up a new profile and I want to set up the profile switching with in that profile perhaps by creating a bunch of profiles from the about profiles page and then replacing those profiles with the old ones as I don't see a way to just import old profiles in the UI. How do I go bout doing that like copy and move exactly what exactly where.

As of yesterday my Thunderbird account vanished, screen asking to set up an account. I am too old to be an IT expert, and I need detailed step by step guidance how to restore that account, full of Inbox emails and folders/subfolders. If it matters (depending on requirements?), my address is @verizon.net - which is pop3 but I have no problem opening the same emails on different devices, as if it were imap (verizon taken over by aol). Pain in the neck, hope to get help.

20 years of emails apparently gone. I have been trying to add TB to a new laptop.

I used the export function in TB and was directed to create a zip file since it was over 2GB. I used 7Zip to view the file and it did not show up in the program. I did this a few times and it kept doing the same thing. When it actually worked I got about 2% of the emails. I believe that, as a result of doing this, that the profile was corrupted by the process of creating a zip file. The result? The original profile on the old laptop is no longer valid. Most of the time when I tried to unzip the file it displayed an error message. I have been through so much over the last few days I cannot remember the entire error but it had the word invalid in it. A red banner across the top of the screen.

I have scoured all my devices for profiles and have tried every one I could find. I was told that using old profiles without them going through the process of TB versions that unexpected results may happen. The latest result, which happens with every profile I use is what is in the attached image. Nothing in or under the inbox, and all this under the outbox.

Is there anything I can do to fix this?

I'm struggling to understand where Thunderbird stores everything on a Windows computer so that I can use my incremental automated backup system to keep things backed up.

This support article :

[- Where Thunderbird stores your messages and other user data]

only mentions about the <user>\AppData\Roaming\Thunderbird\Profiles folder but there is also a <user>\AppData\Local\Thunderbird\Profiles folder that appears to be used and needed.

There is a ton of other conflicting 3rd party information out there so I'm hoping for a definitive answer here.

My question is : Can I backup just the '<user>\AppData\Roaming\Thunderbird\Profiles and <user>\AppData\Local\Thunderbird\Profiles and be assured that I will be fully able to recover my email client in the case of needing a complete reinstall ?

I hope someone can help here. I have used Tbird and FF almost exclusively from release. Thundebird is my only email program and the whole thing is playing up badly at the moment. I can send no emails. Some emails that show in the inbox show a blank screen and can not be deleted. All messages I send come back with an end of message error and SMTP blocked (see attached). This happened a few weeks ago and my email sourse gave me some new settings using port 587 and it worked ok until a few days ago then exactly the same again. They have checked and everyting works ok for them. I then checked with BitDefender to see if they could assist and everything was as expected so I did a complete computr scan with it and it came back with 3 trojan errors all of which were in Thunderbird. So I decided to do a complete delete and reinstall. No matter what I do or what I deleteincluding shutdown after every delete, when I reinstall it comes back with the total and Faulty Thunderbird So I can't start with a clean sheet. Not that I would like to as I have hundreds of contacts an email saves going back many years. Suggestions anyone

Hello, I have read various post saying the profiles folder is %APPDATA%\Thunderbird\Profiles\ but on my side I have many folder, and it can explain why when I use a backup tool, I loose all my e-mail. I have - C:\Users\Me\AppData\Local\Thunderbird\Profiles - C:\Users\Me\AppData\Roaming\Thunderbird\Profiles - C:\Users\Me\Administrateur\Application Data\Thunderbird\Profiles

And how to have only one ? I have tried to edit setting to use only C:\Users\Me\AppData\Roaming\Thunderbird\Profiles but the application refuse it.

Hi all, I used to run two Firefox instances on the same computer, each one using a different account (as I mentioned in the Subject), but I don't remember how I managed this, so now that I moved to a new computer I can't reproduce it! Thanks for helping, if anyone knows. Regards, Mike

I've used Thunderbird for years, and I LOVE it! A few days ago, my hard drive died. I had it replaced, and I've used my data backup to recover much. I did NOT have programs/apps backed up. I need VERY SPECIFIC steps to download and reinstall Thunderbird so that it uses my old profile. Should I first delete EVERYTHING having to do with Thunderbird and start anew? I did download it today and then went to the C:Users/Owner/AppData/Roaming/Thunderbird folder. In that folder, I deleted the "new" profile file (I think!). Then I moved my backed up folder called Profiles into that directory. I tried to get Thunderbird to use that profile, but no luck. I'm reasonably intelligent (I've been told!), but I can't figure how to do this, and I truly need a step-by-step blueprint. Do I download Thunderbird first? If so, what do I then do to make it find the old profile. I'm running Windows 11 Home on a PC. Right now, I'm going for a long walk to clear my brain. In the interim, if one of you really smart, nice experts could give me instructions on how to do this, I'd be eternally grateful. I have numerous folders, and some really important old emails in that old profile. I also would like to be able to retrieve my address book and calendars ... which I ASSUME are part of the old profile. Thanks in advance for ANY assistance! Don't assume I know ANYTHING!!

I am troubleshooting a problem that arose after I migrated a Thunderbird mail account from an old Win10 64-bit PC to a new Win11 64-bit PC.

I installed TB on the new machine and opened the program without doing anything else, then closed the program. TB created installs.ini and profiles.ini files, both with the following as the last line:

Locked=1

This line had not been in either .ini file on the old installation.

I edited these files to point to the backed-up TB profile from the old machine, but I decided to leave the Locked=1 line in the .ini files.

Was this a mistake? I have a strange problem with the new installation, which I won't report until I understand what the "Locked=1" means, and whether I was ill-advised to leave it/them in. Fortunately there has been no evident loss of mail data.

Thanks in advance, Phil

I have two profiles in my Thunderbird account. I want to create desktop shortcut for each profile. That way I can use the shortcut to get my email. On on profile I just want it to go straight to that account without asking for a password. On the other one I want it to ask me for a password. Is that possible and if so how can I do that?

I'm setting up Firefox on a new computer. I haven't done this for a while and the interface has changed, so I'm not sure how it works.

I want to move my Firefox profile to a directory in the Documents library to simplify backup. Following the Mozilla instructions I found, I opened about:profiles and clicked the Create New Profile button. I deleted the contents of the directory that Create New Profile created and copied the contents of the default profile directory to it. The last step is to tell Firefox to use my new profile instead of its default.

But the about:profile page lists three profiles: default-release, default, and my new one. The first two have a Set as default profile button; the last does not. So it appears that I can tell Firefox to use the default-release profile or the default profile, but there's no way I can tell it to use my new profile. I can only Launch profile in new browser -- presumably something I'll have to do every time I run Firefox.

This makes no sense. How can I tell Firefox to use my new profile -- not to launch a new browser with it, but to use it, period? If I can't, why can't I? Every version of Firefox I've ever installed up to now allowed this.

Also, the default-release profile section of about:profiles has the note "This is the profile in use and it cannot be deleted." So it appears that Firefox uses the default-release profile instead of the default profile as its default profile. What is the default-release profile? Why isn't the default profile the default profile?

Opened Thunderbird today April 7, 2025 and the oldest email was from 2:58 PM April 6 2025. All my extensive collection of folders and old email have disappeared. New messages arrive in my inbox just fine. I suspect that there is a folder still on my hard drive somewhere with all the info in it. It appears that Thunderbird just can't find it for some reason. How can I help Thunderbird get back to using that file?

I'm running Win10 and Thunderbird 128.6.0esr. I wanted to move my profile from C: to a different drive (in my case, the D drive). I Googled and got lots of hits, both on the Thunderbird support site and elsewhere, that seemed to indicate to me that some users were seemingly having issues getting this task completed.

Also, looking around in my Windows "AppData" subdirectories, I noticed that there are actually two "profile" directories.

For example: C:\Users\xxx\AppData\Local\Thunderbird\Profiles\abcdefgh.default C:\Users\xxx\AppData\Roaming\Thunderbird\Profiles\abcdefgh.default

Many of the instructions I found were dated from two years ago or more and only discussed moving one profile directory (the one in "Roaming") and I wondered if, in the interim, there's been an addition of a second profile directory that wasn't being addressed in the "old" instructions I was finding on the Web.

So instead of trying any of the suggested procedures I decided to try something else that seemed to be simpler and more straightforward to me. After performing the process I decided to try, testing seems to indicate it works just fine. However, I thought I'd leave this message to ask if there's some issue that can result by doing it as I did.

All I did was to create a new directory on my D drive to hold to two profile directories. Inside this new directory, I created two subdirectories called "AppData-Local" and "AppData-Roaming" to hold the two respective profile directories. With Thunderbird closed, I then copied the two original profile directories into their new respective directories on the D drive:

D:\Thunderbird Profiles\AppData-Local\abcdefgh.default D:\Thunderbird Profiles\AppData-Roaming\abcdefgh.default

Just to be safe, I then renamed the original profile directories under the "...\AppData\..." directory on C: so that if my idea went south, I could just restore the original configuration easily because they weren't deleted. So the original profile directories became...

C:\Users\xxx\AppData\Local\Thunderbird\Profiles\abcdefgh.default.delete_me C:\Users\xxx\AppData\Roaming\Thunderbird\Profiles\abcdefgh.default.delete_me

All that was left was to open a Windows "cmd" console window (running as administrator) and create a symbolic link in each of the original directories on the C drive that point to the new locations of the directories on the D drive:

C:\Users\xxx\AppData\Roaming\Thunderbird\Profiles>mklink /D "abcdefgh.default" "D:\Thunderbird Profiles\AppData-Roaming\abcdefgh.default"

C:\Users\xxx\AppData\Local\Thunderbird\Profiles>mklink /D "abcdefgh.default" "D:\Thunderbird Profiles\AppData-Local\abcdefgh.default"

(Note that I changed the "current directory" before running each "mklink" command to put the symlink in the right directory.)

Then, I started up Thunderbird and... it was as if nothing happened. Everything (old messages, settings, etc.) was still there exactly as before. So far, my limited testing seems to indicate that this process worked without a hitch. I even tried the Thunderbird "backup profile" feature and it created a zip file that seems to contain a subset of the contents of the "Roaming" profile directory, which I suspect is perhaps all that really needs to be saved in a profile backup? Right?

Just in case, I haven't deleted the original, but renamed, profile directories yet. I thought I'd post this message and see if anyone has a reason why moving the profile to a different drive by this symlink process is a "big mistake." Or even a "little mistake" for that matter.

My old Windows10 computer died, but I have an external backup with my Thunderbird profile folder. In the meantime, I have been able to resurrect an old Windows10 computer to continue receiving email, but was not successful transferring the backup profile. Thus, I have "new" profile on this second computer containing only the recent emails not in the backup profile.

I've purchased a new Windows11 computer. My question is: How can I merge my old emails in the backup profile with the recent emails received after the backup was made? In other words, is it possible to merge two separate profiles into one? Thanks.

Illinichip

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?

Can you add a configuration setting to Mozilla Firefox to disable Create New Profile, configurable in the policies.json file? (A second option but a much uglier one would be to disable being able to select a file location for a new profile. Then you could make the default profile directory write only, which would also accomplish the same thing.) (A third option would be to able to configure extensions by default upon installation in the ExtensionSettings policy.)

To explain, I use LeechblockNG on Firefox on Ubuntu. Very helpful. By placing a policies.json file (see at bottom) in /etc/firefox/policies/ directory, I can create a system wide policy. I can make the LeechblockNG extension mandatory and to be installed upon every new profile creation. That all works very well. HOWEVER, there is NO way to be able to set those options in the new profile. So LeechblockNG is installed with default options (which are no blocking at all), which effectively bypasses the addon.

I am also writing the author of the leechblock extension to see if there is any way to set the options for leechblock upon installation (the third option above).

But I know other people have this same question, and at present, if I am correct, there is no way to block new profile creation, or the Profile Manager window in Firefox.

So could you please add that option to the Firefox policies.json configuration? Something like "DisableNewProfiles": true would do it.

Thanks!

My current policies.json file in /etc/firefox/policies/ directory: { "policies": { "BlockAboutConfig": true, "BlockAboutProfiles": true, "PrivateBrowsingModeAvailability": 1, "DisableSafeMode": true, "ExtensionSettings":{ "*": { "installation_mode": "blocked", "blocked_install_message": "Prohibited install more extensions." }, "leechblockng@proginosko.com": { "installation_mode": "force_installed", "install_url": "https://addons.mozilla.org/firefox/downloads/file/4374316/leechblock_ng-1.6.6.xpi" } } } }