Firefox Community Forum

Lost my original FF profile when I created a new 2nd profile. Opened FF. clicked profile icon. in drop down menu, I clicked on " create new profile". Set color, skipped most of the rest,then "set default browser to Firefox" using the button in FF dialog box, NOt Windows settings. Found and clicked on box " choose profile at startup". CLosed all instances of FF. Opened FF, box saying choose profile does not show my original profile, only the new one.

Help? I need to get back to my original profile, and keep the new one as choice at startup. How do I do this?

I'm a Chinese firefox user, so the following descriptions are translated and may not be so accurate. And the attached image is also Chinese, if necessary please use a translation app or somewhat to see it. I have only one default profile in my Firefox account, and I have stored a large number of passwords and bookmarks in this default profile. For certain reasons, I signed out of this profile while retaining the local data such as passwords—meaning that, apart from not being logged in, my browser state remains exactly the same as before. Now I wish to sign back in to enable synchronization. I can see a "Sync and Save Data" button prompting me to log in. After clicking this button, I am asked to enter my username and password, but then I receive a message stating that I have reached the account limit for this profile, and that this profile was previously synced to another account. This is absurd, as I do not have another account, nor have I ever synced this profile to any so-called other account. As a result, I am unable to sign in on this current profile.

I wanted to separate private and work, so I made a whole new account – and associated it with the old one.

Then I found out I could just make an extra profile, which I did – and then I deleted the new account.

But now I can't access or syncronize my primary profile, and I don't know how to separate the two – or preferably just make one single account again, and the do the new profile from scratch.

When I try to log in to my original account with cyber@mikes.dk it says:

Account already in use cyber@mikes.dk is already signed in to the “Cybermikes” profile You can only associate this account with one profile on this computer.

Can you help?

im loged in to firefox and i want to change from 1 of my profiles to another one of my 3 profile but it wont let me choose on of the other profile it show them to me but cant pick one ?i have work to do and i cant get anythiing done because of this ?

Or to open the profile selection sidebar?

I don't see it in about:keyboard but maybe there's something else somewhere.

If not, what's the quickest and easiest way to switch profiles?

Здравствуйте, на одном из компьютеров которыми я пользуюсь браузер выдаёт всплывающее окно со следующим текстом " this profile was last used with anewer version of this application. Please create a new profile." скрин прилагаю. на всех компьютерах win10, с чем это может быть связано?

Hey all,

at shell:startup on windows i will open firefox two times (first for multimedia like tv-stream and maston, second for "working activities" like webmail, office online).

How can i open by file explorer link (like in shell:startup) a new tab (newspaper) everytime in instance "first" even if i was using second at last?

I recently opened this 'bug' which may involve my inadvertent use/misuse of Profiles. https://bugzilla.mozilla.org/show_bug.cgi?id=2052294

How can I locate other (older) Profiles in the Mozilla Firefox structure and use this to run an older version of Firefox ie: 132 or other Version that I consider to be more stable.

(I have already seen where it is not recommended to go to an older version, once a profile has been used on an updated version. At this time - I feel any damage has ALREADY been done & cannot make things much worse.)

One instance does not have bookmarks and passwords. The machine keeps switching between instances for Default. Machine is Ideapad 1i Windows, 11 64bit. Both Versions of of Firefox Appear to be 155.0.

I have created two profiles using the new functionality that is accessed using the "hamburger" or three horizontal lines menu. I want to open one profile at times, but the other at different times. I can only specify a default profile for initial browser start, or to have the browser make me choose each time. Either of these options mean that I have to go through extra steps to launch any profile beside the default. This effectively makes the new profiles less useful to me than the profile manager that has been around for much longer.

Searching for help online has led me to several suggestions to create shortcuts that use the -P "profile name" switch for each profile. This is out of date because the profiles I can access from the command line bear no connection to the ones I have created as described in the above paragraph. They are only the ones I have created using the (old) profile manager from the profile manager in about:settings.

Did I miss something, in other words is it possible to do something similar with the new container profiles as I can with the original config profiles?

I’m honestly fed up with this issue. **How is this even acceptable?** Every time I update Firefox, or sometimes completely randomly, my entire Firefox profile gets logged out.

And it’s not just my Firefox account. **All the websites and services I’m logged into get logged out as well — including my email accounts and other websites where I have active sessions.** I then have to go through the ridiculous process of logging back into everything again.

This has happened **8 TIMES already.** Eight times! This is not a one-time bug or a minor inconvenience anymore. It is seriously disrupting my work and wasting my time.

I need to know **WHY Firefox keeps doing this** and why an ordinary browser update is apparently capable of destroying all my active login sessions. If this is a bug, it needs to be fixed. If it’s caused by a setting, update, or profile issue, then tell me exactly what is causing it and how to stop it.

I’ve used Firefox expecting it to reliably keep my profile and sessions intact. Having to repeatedly log back into my email accounts and every other website is completely unacceptable.

• • Please don’t just send me a generic “restart Firefox” or “clear your cache” response.** I’ve already dealt with this issue 8 times. I want an actual explanation and a proper solution.

Please take this seriously and investigate what is happening to my profile and login sessions.

Thanks.

When i upgraded Firefox my old profile doesn't show up now. I found my old profile under about:profiles but when i click on the Launch profile in new browser i get this message, "You've launched an older version of Firefox. Using an older version of Firefox can corrupt bookmarks and browsing history already saved to an existing Firefox profile. To protect your information, create a new profile for this installation of Firefox" I did create a new profile but how do i get my old saved data, add ons etc to the new profile?

I did not ask for and do not want profiles at all. It seems this was added when firefox updated? How do I get back to the old version with no profiles. It also lost all my bookmarks etc. Help would be appreciated.

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.

Pinterest has been slow to load for the past month. Now it will not load at all. It works fine in safe mode. A fresh install of Firefox did not help anything? I see other folks are having the same problem. Amazon and Facebook are now doing the same thing in Firefox. These 3 programs work without issue in Chrome Brave and Edge. Any one have a fix?

Thanks, Wayne