Komunitné fórum Všetky produkty

I switched to Firefox a few months ago and I've been using the "about:profiles" page to mimic chrome's profile feature. I have 3 profiles, each with their own Mozilla account. How can I migrate these to the new profiles system?

Hi, I do not understand the new profile management feature of Firefox and how it relates to sync. I am logged into my Mozilla account that syncs bookmarks, and I use the default profile that I renamed to "personal". When I switch to a newly created "work" profile, I am no longer signed in.

Will the new profiles "personal" and "work" be synced to my account once I log on to both? I am using Firefox on several PCs and I don't want to recreate profiles such as "personal" and "work" on all the PCs manually?

Thanks for a reply.

Got up this morning and stared up Thunderbird as I always do but got a 'new account dialog'. All of my emails, folders, settings, etc. are gone. Went through the Help - Trouble shooting process to find the old profile. There are three profiles listed in 'About Profiles' and if I launch with any of them, all I get is a new setup. Freaking out here as I have 10 of thousands of emails, in multiple email accounts, in a relatively complex folder structure which includes online and local folder storage. I have a feeling that Thunderbird updated last night and is the cause of this problem.

Running Windows 10 Pro v 22H2, build 19045.6332 . Thunderbird 140.3.1esr (64-bit)

new firefox update today plus windows update - get message "The bookmarks and history system will not be functional because one of Firefox's files is in use by another application. Some security software can cause this problem." Have tried to restore - no luck. Other bookmarks - empty.

Lost all bookmarks

Hello Thunderbird Team I am facing a crisis and am praying you can help me. I have been using Thunderbird since 2021. I had setup my account and archives by year containing messages in Folders (Inbox, Sent & Deleted). During a recent laptop migration, I accidentally deleted my profile on my old laptop. I immdeiately recreated it. However now all email stored in my inbox has disappeared. Second, I cannot seem to locate the archives. So I have 2 requests for urgent support: 1. How do I locate the messages in my inbox prior to deleting my profile? 2. How can I recreate the archive with folders? I can see that the profile folder is a massive 22 GB. So the data is there somewhere. Please help me recreate my email profile so I doi not face a business crisis. Thank You Warm regards Milind

Hello,

I received a popup tab about creating separate profiles. I am still not seeing an option to create another profile, in my case keep personal and work browsing separate on my work computer. The articles I have read do not seem to fit my situation. Firefox is up to date. Thank you for your help.

Do I have to be logged into an account to use profiles? I'm on my work computer on which I don't log into my account and "Profiles" option does not show up on my toolbar.

hi, I'm switching from 1 PC to another. I can download Thunderbird easily, however when I try to open, I get a popup saying profile missing. and I can't open Thunderbird. no idea what happened. any advice please? thank you! Jeff

I want to back up the Local and Roaming folders, in case something goes wrong. But I am getting an error code 80070057. I ran DISM Restore Health, but that did not change anything.

Hello, I have two profiles, one for work and one personal. I used two different email addresses for them. How can I merge these together for the new profile management?

Bonjour, J'ai essayé à plusieurs reprises d'installer Thunderbird (a chaque fois 1 don est requis) mais à chaque fois le même message s'affiche : "Le profil Thunderbird ne peut être chargé. Il est peut-être manquant ou inaccessible". Une première fois l'installation avait fonctionné mas j'ai essayé de modifier le profil afin qu'ils puissent reprendre le carnet existant sur mon ancien ordinateur. Aujourd'hui je suis bloqué. Avez vous 1 solution à me proposer ? Merci

How can I move Thunderbird 140 from Windows 10 to Windows 11 computer? The latest Thunderbird download is 143. But it doesn't recognize my copied profiles, in folders /Local and /Roaming. I have edited the profiles.ini to only see the one profile that I copied.

I migrated from Win10 (v140 ESR 32-bit) to Win11 (v143 64-bit). I copied both /Local and /Roaming folders. Thunderbird keeps showing “Account Setup.” profiles.ini contains two [Install...] blocks and I already removed them.

Can you help reset the install hash or rebuild the installs.ini file live with me? — that was a suggestion from a tech at JustAnswer.com

Thank you.

I don't have a Profiles menu under the Account button on the main toolbar. My Firefox was just updated and the update tab info talked about the new profiles feature as if it was available. Is this rolling out in phases or should I be seeing it?

I have version 144.0, updated on 10/14/2025.

Thanks.

I am using a very old system that is running out of storage space. There is an 8.73 GB folder that I would like to empty to free up space. C:\dtemp\Profiles contains several folders that were created 10.27.21: 2qzfs15q.default, eybandys.default, f81zrqic.default-release, pctnmazu.default-release-1, and yns5cb3s.default-release.

Can I delete any of these folders?

My windows 10 PC died. I copied the the profiles folder from the old appdata/roaming/Thunderbird to the new Win11 PC, but TB does not pick it up, asking to create a new account "John Doe". Any ideas? Best, K.

I do not want to use Thunderbird anymore. So I deleted my two mail accounts, but thunderbird still remembers them - this I do not want. And how can I close thunderbird definitely, thunderbird also forgot already the main password... Thanks for help!