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Migrate profiles from old to new system

I have multiple profiles set up with the "old system" ( https://support.mozilla.org/en-US/kb/profile-manager-create-remove-switch-firefox-profiles ). Now, the new system … (tuilleadh eolais)

I have multiple profiles set up with the "old system" ( https://support.mozilla.org/en-US/kb/profile-manager-create-remove-switch-firefox-profiles ). Now, the new system is available for me, but I can't see an easy way to migrate my existing profiles into the new system.

Open 1 120

Can't see my profiles in the new profiles UI

I have been using Firefox profiles for years, long before the announcement of the new profiles UI. The new profiles UI launhed with FF 144. I'm on the latest version, wh… (tuilleadh eolais)

I have been using Firefox profiles for years, long before the announcement of the new profiles UI. The new profiles UI launhed with FF 144. I'm on the latest version, which is 149.0.2 and I still don't have the new UI. Specifically, I do not see my profiles in the new UI.

When FF launches I see the new UI but my profiles are nowhere to be see as you can see in the screenshots:

https://postimg.cc/gallery/tFXz00m

I have 2 profiles and they each have their own name.

Instead I am presented with 2 option "Original Profile" and "create new Profile". When I click on orignal profile, Firefox opens my default profiles which has its own original name. However, when go throught the new UI o switch profiles, I do not see my other profile. Moreover, if I click manage profiles, I don't see either of my profiles.

The only way I am able to launch my 2nd profile is the old fashiong via "about:profiles".

Why can't I see my profiles in the new UI?

On my 2nd profile, I don't even have the new profiles UI.

Why dont't I have the new profiles UI months after you launched it?

Please help!

Open 8 110

Turning off the Firefox Profiles message

I have been using the old firefox profiles system for ages. However, whenever I open my browser (in one of about 5 profiles), I always get this pop-up saying "Say hello t… (tuilleadh eolais)

I have been using the old firefox profiles system for ages. However, whenever I open my browser (in one of about 5 profiles), I always get this pop-up saying "Say hello to Firefox profiles". It is incredibly annoying and turning me off Firefox completely! Can somebody tell me how to turn this message off? I assume it's in the settings somewhere.

Open 2 2 110

keeps saying profile was created with an older version...

Hi, My Firefox had auto updated to the newer version with AI built-in and auto-enabled, which meant the browser would crash EVERY. SINGLE. TIME. I would launch it. For pe… (tuilleadh eolais)

Hi,

My Firefox had auto updated to the newer version with AI built-in and auto-enabled, which meant the browser would crash EVERY. SINGLE. TIME. I would launch it.

For perspective, I am running an old Lenovo Thinkcentre mini PC with an Intel i5 6th gen and 16gb of ram; its got Windows 11 installed, and always running out of memory with the simple things like browsing and word processing. This is NOT a PC or use-case that needs or warrants AI.

So, I uninstalled Firefox (149) and installed the latest version WITHOUT AI built-in (147).

I then synced my profile, and things ran fine. An hour passed, and then i kept getting an error, saying my profile was created with whatever and I need to create a new profile.

So, I created a new profile and synced, again, and I got the error, AGAIN...

I'm about to boycott Firefox on all the devices I control, and opt for an older version of Opera or something more obscure, so that I don't have to deal with this nonsense.

Open 3 100

CAN'T EDIT/DELETE PROFILE IN NEW PROFILE MANAGER

No matter what I've tried, I cannot figure out a way to edit or delete the profile from the new profile manager. Both about:editprofile and about:deleteprofile show up a… (tuilleadh eolais)

No matter what I've tried, I cannot figure out a way to edit or delete the profile from the new profile manager. Both about:editprofile and about:deleteprofile show up as a blank page (with how it looks on my normal profile for comparison). I have tried deleting the folder multiple times, but the icon still shows up in the manager and clicking it just creates a new profile with the default settings. It also does not appear when using firefox.exe -p. I had previously been using the about:profiles to manage my profiles and wanted to see if I liked the new version (I didn't), hence why I was using it in the first place.) I'm currently using Firefox version 149.0 and Windows 11 on the latest version. I have found no solution that gets rid of it. I would also be fine getting rid of the profile manager UI so it stops bothering me.

Open 5 100

I am being asked by Firefox to create "new profile" which I cannot seem to do.

After closing Firefox, I often get a message for "creating a new profile". It seems difficult to do this and it would be very helpful to have a link where this can be eas… (tuilleadh eolais)

After closing Firefox, I often get a message for "creating a new profile". It seems difficult to do this and it would be very helpful to have a link where this can be easily done. Thanks for all your help. Alok Bhargava [edited email from community support forum]

Open 1 90

Tiny icon on top of Firefox icon in system tray

Recently a tiny icon of an empty shopping cart has been superimposed at the top right-hand corner of the Firefox icon in my system tray. I want to get rid of it. In addit… (tuilleadh eolais)

Recently a tiny icon of an empty shopping cart has been superimposed at the top right-hand corner of the Firefox icon in my system tray. I want to get rid of it. In addition, just in the last few days, I'm being asked to choose among profiles when I sign onto Firefox and I want to have only one default profile and to avoid that extra step in signing on.

Open 4 90

I need to merge my profiles

Been using Firefox for 20+years in poway, ca now in Oregon City, somehow I ended up with 3 profiles, I would like to merge at least the bookmarks and delete 2 To stop con… (tuilleadh eolais)

Been using Firefox for 20+years in poway, ca now in Oregon City, somehow I ended up with 3 profiles, I would like to merge at least the bookmarks and delete 2 To stop confusion, thanks Ralph Kirn

Open 1 90

Much to my regret, I clicked on New Profile, and now all my shortcuts are gone. How to I go back????

Much to my regret, I clicked on New Profile, and now all my shortcuts are gone. How to I go back???? Or, I suppose I could find out how to add shortcuts. But, just so you… (tuilleadh eolais)

Much to my regret, I clicked on New Profile, and now all my shortcuts are gone. How to I go back???? Or, I suppose I could find out how to add shortcuts. But, just so you know, I am ANGRY that I am wasting time on this! Why couldn't you have left well enough alone????

Open 1 90

I am having a major problem with Thunderbird and recovering my inbox emails and specifically all my local folders.

Hello- I am having a major problem recovering both emails in my inbox, and more specifically all of my local folders. I am using Windows 11, Pop-3 server. My Local Dir… (tuilleadh eolais)

Hello- I am having a major problem recovering both emails in my inbox, and more specifically all of my local folders. I am using Windows 11, Pop-3 server. My Local Directory keeps reverting to att-1.net and changes I made to my prefs.js file to eliminate the att-1.net folder and revert to an att-net folder containing all the data are not sticking. I've tried using Claude to diagnose and correct, but that hasn't worked. I am not extremely proficient at this, which is probably part of my problem. Any advice would be welcome.

Open 1 80

It looks like "turning off hardware acceleration" is not applied to the initial "Firefox - Choose User Profile" !, What should I do ?

Hello All, I'm using Firefox (149.0.2 snap) with LUbuntu 24.04.4 LTS. Because of a wrong graphic driver, I had to turn off hardware acceleration in FF. When FF is starte… (tuilleadh eolais)

Hello All,

I'm using Firefox (149.0.2 snap) with LUbuntu 24.04.4 LTS. Because of a wrong graphic driver, I had to turn off hardware acceleration in FF.

When FF is started the Initial "Firefox - Choose User Profile" is unreadable (see attached : wrong_screen.jpg), but if I continue (click somewhere in the window) , all the opened tabs are readable.

Once in FF, if I want to select another profile from the application menu -> .. -> manage profiles, then the "Choose User Profile" window is fine (see attached : good_screen.jpg).

I tried to start FF with the "-P" option to specify wanted profile but it continues to start with the unreadable "Choose User Profile" window.

Could someone give me a solution, except finding the good hardware driver for my computer?

Thanks Bouilla.

Open 1 80

why do I need a profile when I am the only one using my computer and programs

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 F… (tuilleadh eolais)

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?

Open 2 70

Missing or inaccessible profile

Out of nowhere today I encountered with Firefox seemingly crashing. My laptop said it needed to reboot. Once rebooted I began to get the missing/inaccessible profile er… (tuilleadh eolais)

Out of nowhere today I encountered with Firefox seemingly crashing. My laptop said it needed to reboot. Once rebooted I began to get the missing/inaccessible profile error. I tried to uninstall / reinstall but continue to get the error. When I search through for the missing profile per all guidance and troubleshooting Windows says it's not found. When I use the "run" it doesn't bring me to a folder but to a notepad type screen (copy paste below). I do not see where I have any options. Would it be effective to just delete all Mozilla from my laptop? I uninstalled / reinstalled but same error.


[Install308046B0AF4A39CB] Default=Profiles/5yyitbs7.default-release Locked=1

[Profile1] Name=default IsRelative=1 Path=Profiles/cd6wstjp.default Default=1

[Profile0] Name=default-release IsRelative=1 Path=Profiles/5yyitbs7.default-release

[General] StartWithLastProfile=1 Version=2

[BackgroundTasksProfiles] MozillaBackgroundTask-308046B0AF4A39CB-defaultagent=2eq3b8bj.MozillaBackgroundTask-308046B0AF4A39CB-defaultagent MozillaBackgroundTask-308046B0AF4A39CB-backgroundupdate=1syr00zv.MozillaBackgroundTask-308046B0AF4A39CB-backgroundupdate

Open 1 70

Mailboxes Catastrophically Deleted If Thunderbird Opened In Offline Mode After Profile Location Change

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 … (tuilleadh eolais)

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.

Open 2 70

profile sync issue

I created a new profile on my account. Whenever I am in the original profile, I can click on the new profile and it will open a new window with a new icon. However, I not… (tuilleadh eolais)

I created a new profile on my account. Whenever I am in the original profile, I can click on the new profile and it will open a new window with a new icon. However, I notice that under the new profile, it is not signed in. When I try to sign in, I get an error that says

Account already in use xxx@gmail.com is already signed in to the “original” profile

You can only associate this account with one profile on this computer.


Then it forces me to switch back to the original profile. This tells me that the profile is not syncing for access across devices.

This is happening on my macbook.

Open 3 69

The browser automatically starts, ignoring the disabling of this setting when the PC starts.

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" t… (tuilleadh eolais)

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.

Open 1 60