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We are unable to sign in to thunderburd

using correct crudentials. We wen to geek squad to correct this issue. He installed webnet as a work around.

He said we would not lose any thunderbird emails however all the new and saved emails are no longer available to see or open. We would like you to reinstall thunderbird and restore all the lost emails. How does this get resolved?

I moved to a new PC and copied my thunderbird profile for my emails. I do not have access to my old PC at the moment. Is there any way to "log out" or disable the emails on the other PC by deleting the thunderbird profile access or similar?

I could go manually through google to log them out, but it will also remove the access on the new PC and in this situation there are a lot of accounts and the setup is a hassle.

At startup, Firefox starts with an account setup screen. I have been using current setup for 3 years. Tried troubleshoot mode to no avail. Had same problem 3 years ago.

I tried to start Thunderbird and it would not open. There was a message that read, "Your Thunderbird profile cannot be loaded. It may be missing or inaccessible." After trying to fix it and nothing worked, I uninstalled and reinstalled Thunderbird. Now all of my contacts and data is gone. When I tried to use the import tool I selected import from another Thunderbird installation and I can't get past the continue button.

How do I recover all of my data and contacts/addresses?

Hi, how can we identify the version of a profile in order to know the appropriate version of TB ?

I am receiving a message that a newer version have modify my profile and i need the old version but it's no longer on my HD...

Thanks

Yes, I'd like to use the same account on both of my profiles.

I understand that for some users, this may be confusing.

In my case, the only reason for different profiles is that I need to use a Proxy Server for some websites, and no proxy for other websites. Manually switching proxy settings is painful, and doing so causes traffic for my other tabs/windows to go to the proxy, which I do not want.

I have a main (set of) windows (and its tabs) going straight to the internet, then I have a separate window (and its tabs) configured to go through a proxy (SOCKS5 in this case). I want all other settings, bookmarks, passwords, etc. to be identical to both. I end up having to logout of my main profile, log into the other profile to sync settings, log out of there, and log back into my main profile.

Is there a valid technical reason why an account on the same FireFox installation cannot be shared between two profiles?

I can do this on multiple computers (same account, different computers/profile), seems odd it is restricted to not allow on the same computer.

I have an alternative solution: Install FireFox natively, then install FireFox as AUR or FlatPak, but not sure this will collide as this both uses the same profile directory. Hum...

Wayne

I'm abandoning Windoze for Linux Mint Mate. The original Win11 Laptop is still available - no cloud connection, the Windows account exists but is unused. The laptop has all my Thunderbird v146.0.0 (64 bit) mail, address books, calendars.

I have a refurbished PC, came with new-install Win11. Now dual-booted as a Linux Mint 22.2, Mate desktop. The Win11 partition is unused and will stay that way for the foreseeable future.

I use gmail since TalkTalk finally terminated access to my Tiscali account. (I dropped TT many years ago.)

I've setup Thunderbird on Mint, can't see how to find its version. It came from the Mint default setups. Gmail is working but missing all the 'Local' stuff. The calendar has a few of my auto-repeat entries but none of the random ones. Some of my address books are missing.

I remember from the Win10 > Win11 migration that I need to move the 'profile'. It will be large but I have big-enough USB memory keys. And no, the machines are not network linked. I don't trust Microsoft and won't allow any of their corrupted stuff any access to my new kit.

Guidance needed:

• What needs to be moved? From where on Win11?
• Where to put the stuff on Mint. How to migrate it?
• Any problems to watch out for?

Help please? Links to resources? Forum posts, online guides, wise words? Or 'just do it this way!'

TIA PeteS

Hello. Today, gone through updates from 115.10.1 to 115.18.0 to 128.14.0 to now 140.6.0 and still cannot shut down Thunderbird in one profile, to then be offered a choice of profile and changeover. It just would not today do that. Instead it re-opens in the original profile, without the profile selection box. Any solutions? Thanks.

I've been using what I gather is an "older" profiles system via about:profiles.

Now if I:

1. go to about:profiles and open my second profile in another window, 2. close second window and about:profiles page, 3. open about:profiles again in first window,

I get "Another copy of Firefox has made changes to profiles. You must restart Firefox before making more changes."

This happens every single time, even though I've made zero changes to profiles, and is extremely annoying.

Can/should I migrate my profiles to the new profile manager? How to do this?

Oct 23, 2025, 19:35 CST

I FINALLY was able to find the original profile, all messages in the In Box, plus all folders with their contents. 'Lost' when our ISP's ' tech support person ' had me close/remove the TB POP3 account and create an IMAP account).

I need to merge the new small profile (In Box & with basic folders) into - onto the BIG, original, profile. So each time I get/check mail everything goes to, ends up in, the Thunderbird account containing all the OLD data and new working account.

Please remember I am barely TB literate, so start at 1 (A), not 27 (Z)& no tech words. Nor acronyms please.

Thanks! Remain in GOOD health, be WELL, 'n be

• • SAFE!**

Robin

Hi, I am extremely frustrated at my situation: I have a desktop (main computer), laptop and mobile phone all using Thunderbird, with a GMAIL account (IMAP) On my laptop I accidentally deleted the contents of the Archive (Thunderbird folder) and promptly ALL EMAILS AND HISTORY of emails wer LOST on said laptop. They subsequently disappeared on my mobile phone also. The delete action was also uploaded to GMAIL.com and I could not recover them there as it said I am using a different program. I then went on my desktop in offline mode and all my emails are there in Thunderbird (minus approx 5 days worth while the desktop remained offline (no big deal).

I have tried EVERYTHING to back up/export the profile from my desktop (while offline) and upload the mails onto my laptop to recover them and hopefully feed them to GMAIL. Nothing happens, they do not appear. I see all my emails within the thunderbird profile folder in a "IMAP.GMAIL.COM" folder but not in a "Mail" folder (is that relevant)? Is the laptop loading the emails then immediately deleting them, because it is syncing with GMAIL? I am so so lost. Please help. Thank you

Hi I had a systems crash and did a windows 10 reinstall. Windows created a folder windows.old. In the folder is users/"username"/appdata/local and roaming/thunderbird/profiles/ In the profiles folder for example I have a profile 34eu8280.2020. I transfered this folder to the newly installed thunderbird folder under roaming/thunderbird/profiles/ Next windows+r entered thunderbird-p. Create profile, entered 2020 as profile name, chose folder, entered 34u8280.2020, select folder, finish. In profile manager selected 2020, work offline, unchecked use selected profile without asking at startup, start thunderbird. Profile not showing up only account setup page.

At a lost as to how to proceed.

Any help would be appreciated in restoring profiles

Stan

I was positively surprised recently when the new Firefox profile manager (about:profilemanager) was introduced. https://www.tech2geek.net/how-to-use-the-new-updated-profile-manager-in-firefox-2025/ is an article about that.

However, I thought it's just a new visual UI with an in-browser switcher for the existing profiles (that I already had setup). However, it does not appear so.

The differences I see:

1. 1. 1. old profile management

• was managed by `about:profiles` or when starting FIrefox with `-P`
• is saved in `~/firefox` and the `profiles.ini` clearly and quite obviously mentions them there, so it's easy to manage them.

I also found this old support article: https://support.mozilla.org/en-US/kb/profile-manager-create-remove-switch-firefox-profiles

1. 1. 1. new profile management

• automatically asks on startup if more than one profile exists
• is managed by `about:profilemanager` or with the Firefox burger menu
• seems to be saved in `~/.mozilla/firefox/Profile Groups` (Linux path here) in some .sqlite files, and I do not quite understand the format. Not mentioned in `profiles.ini`.
• also, when you change something here (even like opening a profile?), you cannot open `about:profiles` anymore, because it says "Some Firefox process has made changes to your profile, […] you need to restart Firefox", only after a restart further changes would be possible, which I find quite confusing but it also indicates somehow the features belong together?

And this seems to be the new one: https://support.mozilla.org/en-US/kb/profile-management#w_whats-the-difference-between-profiles-and-multi-account-containers

1. 1. Questions

• What are the differences here (I may have missed)?
• How can the new profile feature save so few files? Is it technically called "profile groups"?
• And the most important: How can I migrate an old profile? (In order to use the new features and GUI etc. I quite like)

This afternoon, I clicked on a link from an email and for the first time got a choose a profile pop-up. I do not want this; I have read info on Mozilla and elsewhere about its purpose but it doesn't say how to just stop the pop-up - there should be an option just stop the pop-up because I don;t want to have to choose amongst options. I have started copy-pasting the links in emails and going to Chrome and will seriously have to reconsider using Firefox of this continues. I don't want to have to type about:config or anything - this should have been an opt out or opt in thing and I want out. Thank you for your help.

My C: drive is almost out of available memory and the following profile, jrqu4wd0.default-release, is the culprit. If I delete it what affect will it have on Thunderbird.