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Hi, All of a sudden, I lost absolutely all of my bookmarks. My PC is running Windows 11. My Firefox account was and still is logged in. At first, I thought the data loss was due to a CCleaner cleanup using their latest update. After the data was lost, I tried running another CCleaner cleanup, but this time it didn’t delete the bookmarks. So I honestly have no idea how this could have happened. These were bookmarks I had saved over many years... It’s a disaster.

PLZ Help

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

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.

On my windows 11 machine, Firefox requires me to re-log into my Mozilla account every few days (there is a yellow triangle on the Account extension, which when clicked, has me to log into my Mozilla account). I have tried several troubleshooting steps:

1) Create a new profile and set it as the default profile 2) Completely uninstall and reinstall Firefox using the steps in the following article, including removing user data. https://support.mozilla.org/en-US/kb/uninstall-firefox-from-your-computer

I'm using Firefox on a Mac and my iPhone and I don't experience this issue. I am logged into my account on both devices.

Thanks,

Paolo

It appears Windows 11 KB5065797 broke my Thunderbird. It will not start normally nor will it start in safe mode.

- I've updated to latest version 144.0 - I've tried starting in safe mode - I've tried running as administrator - Thunderbird shows in Processes, and displays suspended randomly - I've restarted Windows - I've cleared cache under users\x\appdata\local\thunderbird\profiles\x\cache2\entries\

Running Surfshark on Windows 10 or 11 and Unbuntu 24.04. Some sites and attachments giving error failures. Happening with Firefox and Edge. Need troubleshoot source.

"Secure Connection Failed

An error occurred during a connection to forkliftgrocery.com. PR_END_OF_FILE_ERROR

Error code: PR_END_OF_FILE_ERROR

   The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
   Please contact the website owners to inform them of this problem."'

Attachment error.

while watching YouTube in direct mode ... F revert back to normal mode every time new advertisement cut into the flow I have to reselect picture-in-picture mode. Will work reliably till new advertisement

After the update on the 14th, dark mode has gained weird stylistic choices that I cannot find a way to alter: namely, when closing a new tab, a white box with black font appears -as opposed to the previous darker toned grey/purple with white font. However as of writing this post, I notice that dark mode is not working on this webpage. Seeing as I have an extension enabled in addition to the basic dark mode selection in Firefox settings, I can only imagine that something was broken in the update. Please advise, the change is jarring.

Hi I was using TB 142 without problems. When upgrading to 143 ou 144.B4 I have problems sending mails to all users after some times. Usually the first mails are sent immediatly but after around 10 mails, I have very slow response (varies from 5 sec to more than 1 minute and sometimes timeout). Usually quitting TB solves the problem but this is very annoying. I went back to 140LTS and sems to have no longer this problem. This was tested on many diffrent networks. I am running under Fedora release 42

Thanks

This morning, Firefox updated automatically to Firefox 144. However, this update completely broke Firefox; every tab crashed, and I couldn't even use Firefox to get to this help site.

Edition Windows 10 Enterprise Version 22H2 Installed on ‎03/‎25/‎2022 OS Build 19045.6332

Changing my OS is not an option for me; those decisions are made far, far away. I was allowed to use Firefox instead of Chrome. Sadly, I have to switch over to Chrome today in order to work.  :(

I have added a couple of screenshots.

I am moving over to Chrome to do some work.

Thanks for any help, B

Being able to tell anyone what's going on is almost impossible. I am thinking of deleting Firefox despite having been using it for years, a loyal customer who subscribes to your VPN. When I log in my pinned tabs do not open the web sites, I'm told I've got connection issues, I've removed the sites from tracking protection, X tells me that is an issue since it only started after the update before todays update. What is the point of pinned tabs if they don't open? If I can't resolve this issue I will use Chrome, All of my pinned sites open there I just have to get used to using another browser, I don't like Chrome very much but I'm pulling my hair out getting no joy from Firefox. There has to be a better way of contacting Firefox than spend ages online as though it's top secret! I'm using windows 11 24H2

Since last week, virtually anywhere i go using Firefox Android I get the attached cloud flare test for that site. I use a VPN but turning it off doesn't fix it. I have cleared the cache, reinstalled the browser, and the problem persists. Curiously, if I log out and use Firefox without logging in, it stops. Chrome, Brave and Edge don't do this. Thanks, Mike

I have WhatsApp Web pinned as a tab in Firefox, and other than that I also have a home page. Normally when I launched Firefox, only one window would open and it would have both the pinned whatsapp tab and the homepage in another tab.

Since today, now when I launch Firefox it opens two separate windows. One window only contains the pinned WhatsApp Web tab, and the other window contains the home page.

How can I make it so that when I launch Firefox only one window opens that contains both tabs? Please don't tell me this option has been inadvertently removed.... Thanks.

I can't open https://english.ahram.org.eg and https://gate.ahram.org.eg/ Someone knows why? Maybe it has something to do with the last update. I think I could open them some time ago. Thanks!