Firefox Community Forum

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)

Some of the installations seem to be blocked by Microsoft if you are using a Microsoft system. If the Software being downloaded is not sold by Microsoft store, Microsoft blocks it or deforms it. During any update, Microsoft removes MusicBee and some other software not purchased from Microsoft store

I have lost all my Firefox bookmarks. All gone. I have searched online for solutions, and have seen what appears to be a standard procedure for doing so. Bookmarks>Manage Bookmarks> LIbrary>Import and Backup>Restore

This is where it breaks down for me......I see no date available to use. All I see is "Choose File" and when I click that, nothing happens. That is the dead end I am at now.

Can anyone out there point me in the right direction? Many thanks. Jay

My computer unexpectedly had to do a factory reset. I had to add Firefox back on to my computer. It was my main default browser. I couldn't remember my password because I had Firefox for so many years. Your system forced me to change my password and now I cannot gain access to my bookmarks/passwords when I sign on. If you tell me that those were lost in the transition, I will be so upset. This was the only reason I was using you and do not understand why syncing is not working or recovering the information. I hope that this can be recovered, if not I have no use for your browser and will switch to a more updated browser in Chrome. I have never had such problems and cannot even remember all the bookmarks I have lost. I will never forget this experience. My hope is it will be because someone there was able to save the day and not because I realized that your company is outdated and clunky like Microsoft. Hoping you can help and completely upset. I am also very confused why my information would not have backed up automatically.

Mike

My Bookmarks Sidebar is now displaying with white lettering on a very light gray background, making it almost impossible to read. How can I change either the font color in the sidebar, or the background color?

Hmm. We’re having trouble finding that site.

We can’t connect to the server at fzttlwrt.r.us-east-1.awstrack.me.

If you entered the right address, you can:

   Try again later
   Check your network connection
   Check that Firefox has permission to access the web (you might be connected but behind a firewall)

Attempting to follow any number of Ubuntu 24 HOWTOs to connect the Firefox I installed from the ZorinOS App Store to the smart card reader and they are all failing miserably so far.

I am trying to use...

Module Name: OpenSC PKCS#11 Module Moduel filename: /usr/lib/x86_64-linux-gnu/opensc-pkcs11.so

I've tried a few other pkcs11.so's on other paths and FireFox just immediately crashes. This one it at least says it can't add it. The module is owned by root and has 644 permissions so I think it should be readable. Brave Browser is working well with cert auth via CAC and I already have the machine fully set up with logging in via CAC, locking screen automatically when CAC is removed, etc etc so I know that at a base level the CAC is working well. Just can't seem to find the proper link glue.

This is NOT the snap version of Firefox either, I am pretty sure. sudo snap firefox commands say firefox isn't installed.

Dear Firefox, My mouse is not doing the usual function. The right click is giving me different options like translate the word I highlighted or search the meaning. I just need the right click to copy. How did it even changed without my knowledge. Thank you, Alice

Hello, I have been using Firefox for 15 years, you guys are awesome. I have a few issues before with Firefox, in the past but were easily fixed by a refresh or new install, PC reset. I have tried these options and more, and still I cannot see why websites are not connecting, I recently tried Norton Anti track, didn't see anything new deleted after 3-days? (Properly)I am sure anti track is the cause of the problem, it was running fine until deleted extension removed everything. Norton did a remote session taking screen shots of computer and stated Firefox is is just not working. I can access the websites from that browser. I reinstalled Firefox* after install of Norton product, which usually likes to control everything on your computer. I have a HP Pavilion desktop running windows 11/// I just cant seem to get to my accounts seem to be block by something? Account i have had for years. I have done everything on Mozilla help articles, but still not letting me in to the websites??? some are opening email AOL, CVS and a few others, even my Amazon Prime account hesitates while browsing?I had and AOL pop-up stating My GP? settings? could not find it. Can you help any info would be appreciated. Firefox is my default browser and I miss it. Thanks to all at Mozilla, best, Thomas user.

After viewing a livestream on Mozilla browser my screen locked up and I had to restart/reboot. When it reloaded all my settings and presets on my homescreen were gone or changed? How can I restore my mozilla settings and profile to an earlier time to reset to my original settings?

As of 12/9/25, Firefox seems to now prevent Theme add-ons from working if there is a contrast setting configured in Windows configuration. (Version 146.0) Previously, this allowed a very aesthetically pleasing view. I would greatly enjoy having that option again. Thank you.

12/10/25 am my yahoo bookmarks are opaque. they are still there just not visible until you click on them. Later 12/10/25 I rolled back firefox to earlier time and all looked correct again. today 12/11/25 opaque bookmarks again.

Selecting "Help About Firefox" causes the window to appear but this window then freezes with no information. It is possible to close the window and continue with Firefox. This happen nearly always but occasionally works correctly. Current Firefox version is 146.0 but the problem is not limited this version. System is Kubuntu 24.04, KDE Plasma Version 5.27.12 and QT Version 5.15.13 I have tried several things. Deleting the .Moziila folder will permit the window to work once but after a restart stops working. Any new things to try would be appreciated.

I had to have my laptop serviced. When it came back, I downloaded Firefox and logged into my account. Usually, all bookmarks and passwords would load back up, since they were bound to my account. Unfortunately, this time after had synchronization finished, none of my data was present. It's as if my whole account was wiped. The only thing I did was change my password. How can I restore everything?

Hi Mozilla I hav got a problem with Firefox on Kubuntu 24.04.3. Everytime the computer is restarted Firefox crashes the first time it's started. That's not a big problem, starting Firefox again don't take long. But the problems is exceeding. If i start Firefox by clicking a link in a mail in Thunderbird. And Firefox has not yet been started, It crashes, but now it's also invaliding the Task bar on the screen where Firefox was started. Invaliding means that I cannot start apps from that screens taskbar, and the clock has stalled, none of the tools works etc. The only possibility solution I have been able to figure out, is restart (It's like going back to Win 98). Sometimes I am able to start a app from that invalid taskbar. But it's not the one app that i clicked on. Even though I can trigger it via Thunderbird, the invaliding of the taskbar will occur after a while. And I have to restart. I am not sure if this is the right place to post. But Firefox is always involved, but maybe Thunderbird or Ubuntu was the right place? Every time Firefox crashes there is send a crash report to Mozilla, but is has been going on for a while, so i guess that nobody is looking at the crash report. If I use Chromium instead of Firefox I don't see the problem.