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This problem just started with the latest version of Firefox that opens with two profiles. It worked for a short time and then failed. Firefox will not open if I choose the default profile. I can open Firefox if I choose Profile #2, but it has none of the history of the default profile. I lose all of my extensions, history, bookmarks - everything.

How can I get back to where I was yesterday? (Note: I'm just a user, not a computer geek, and don't understand the buzzwords or technospeak. I can follow clear instructions like copy, delete, rename, etc.)

I'm using an HP laptop with Windows 11.

Hi

I have tried to launch Firefox a number of times today and every time it has frozen and does not respond. When trying to select the option of opening the software in Troubleshoot mode, once again the software freezes and I am unable to open the software in Troubleshoot mode . I have tried shutting and re-opening both the software and my laptop but this does not resolve the issue. Can you please either resolve the issue of the software freezing or tell me how I can resolve the issue.

New laptop. Installed Firefox. Set up 2 of the "new" type profiles. Typical extensions (Bitwarden, Bit.ly, Firefox Color). Not too long after, Firefox will no longer launch and the only remediation I've found is to do a clean uninstall/reinstall including deleting registry keys. I've now done this three times now. Environment information

• i7 Core Ultra/32GB RAM
• SentinelOne - Corporate Environment. Installs Firefox Extension. There are no signs in the S1 portal or client that it is blocking firefox.
• nVIDIA RTX PRO 500 Blackwell Video Card. Updated to current driver 582.16
• Threatlocker - Computer is new and has been in "Learning Mode" so it isn't an issue
• Tailscale runs on this machine, but it doesn't seem to make a difference if it is running.

Nothing in the %APPDATA% crash reports folder for firefox. Crash dumps for firefox are in %LOCALAPPDATA%/CrashDumps. One read by AppCrashView is attached. It is a 0xc0000005 Access violation in StackHash_2264.

This is a problem where renaming the firefox.exe to firefox1.exe will get it to run but it seems to lose track of profiles.

Firefox is my favorite browser and I'd like to resolve this, but I really can't afford spending much more time on it or continually clean reinstalling and rebuilding profies. I've seen other similar posts, but no clear resolution.

Hi,

I was super pumped about profiles but it seems it has gone terribly wrong for me.

I created a two profiles on one computer and would like to reuse them on another. Apparently this is impossible, which is really too bad, please change that! Why would I want to redo everything on every computer that I work with? And it deleted bookmarks on other computers synched to my account, why?

And I deleted every profile on one of my computers, in the hopes to "start fresh" since I had lost all my work, and now Firefox refuses to open. It indicates "Your Firefox profile cannot be loaded. It may be missing or inaccessible".

So now I need to re-install the whole app. Just... Why?

Thanks!

On one macOS Sonoma machine, Firefox launches very slowly and then crashes. On another Mac with the same macOS version, Firefox works normally.

Even in Safe Mode, Firefox cannot start its GPU and socket subprocesses. Steps to Reproduce 1. Download the latest Firefox from the official Mozilla website. 2. Install it normally in /Applications. 3. Launch Firefox by double-click or from terminal. Firefox starts very slowly and then crashes or becomes unstable.

When launching Firefox in Safe Mode: /Applications/Firefox.app/Contents/MacOS/firefox --safe-mode [Parent 1846, IPC I/O Parent] WARNING: Failed to launch gpu subprocess @MachCheckInListener TimedOut (Error:0) [Parent 1846, IPC I/O Parent] WARNING: Failed to launch socket subprocess @MachCheckInListener TimedOut (Error:0) [GFX1-]: Fallback remains SW-WR [GFX1-]: Failed to launch GPU process after 3 attempts

• Reinstalling Firefox does not fix the issue. • Safe Mode does not fix the issue. • The problem appears to be related to Firefox child process initialization (GPU and socket processes). • The browser often starts in crash recovery state. • Automation tests fail with: “Browsing context has been discarded”

Firefox is currently unusable on this machine due to repeated crashes and inability to initialize required subprocesses. • Any recommended workaround or diagnostic steps.

My iMac automatically updated to the latest version of Firefox and now Firefox won't open at all. I keep getting an error message about installing a helper tool. I tried both installing the Helper Tool and canceling (see attached image) with no success. Please advise.

Thanks! Carol Boehler cboehler2@unl.edu

I have Firefox installed and pinned to the taskbar. When I click it, it immediately goes to a download Firefox page instead of opening. I then open another tab to get into g mail or anything else. I can then close the download tab and continue. This is most annoying. I tried uninstalling and reinstalling which works but then lost all bookmarks and the answer there was to go to old Firefox and restore, which I did and that worked , however, the download page came with as well and this time in a different more colorful version that is quite long.

I have tried all the troubleshooting steps of uninstalling, reinstalling and backing up my profile but on every machine after one session or one time instance and if I have to close Firefox or restart my workstation, I can no longer launch Firefox. It leads me to believe there is some kind of profile issue or corruption with my account but for months I've been battling this issue and can not resolve it. I do remember getting some Firefox window showing the Profile option or Create Profile and I believe nothing was selected. I proceeded to select the Profile on the left and it seems after that is when all the problems started to occur. If anyone has experienced this or can assist, I would greatly appreciate it.

I have been battling with Firefox for a bit now with this 'helper tool' download. Every single update it requests access, which is has, and then won't actually open Firefox. I have to uninstall and reinstall each time to get some level of functionality back.

Checking online this isn't a problem isolated to my own computer, but aside from getting the pro version, there were no great solutions.

Can this issue please be fixed?

I need to uninstal firefox because it is not opening, keep getting message to first close firefox !!! I can not close firefox because I can't get it to open in the first place.

Whenever I click on the Firefox icon to start, instead of FF, AOL comes up. I looked on my C: program list and it is not listed so I can't delete it. It just started doing this in the last week. I tried downloading FF again with no luck. Its on an old windows 10 machine.