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в моменте браузер перестал запускаться , я люблю твикать и оптимизировать виндовс подумал дело в ней , но переустановил виндовс скачал обновления виндовс и начал по одному шагу оптимизировать и делать настройки виндовс , по итогу настроил точно так же как и раньше , но браузер работал , скачал античит фейсит и перестал работать , сейчас переустановил виндовс не настраивал вообще только скачал браузер и античит фейсита и браузер перестал запускаться выдавая ошибку

I’m suddenly unable to open Mozilla Firefox at all on my Windows 11 Pro (version 25H2) Surface Laptop. The browser never launches - every attempt immediately crashes and opens the Firefox Crash Reporter.

I tried uninstalling and reinstalling a fresh copy of Firefox (and removing the old application files, though the original Firefox program folder has 13 .tmp files inside a “tobedeleted” folder that I can’t delete), but the issue persists. When I try to install or uninstall Firefox, I get the same behavior: Firefox never opens, and I end up with multiple instances of the Crash Reporter popping up instantly.

Tried renaming firefox.exe as well to no avail. Chrome and Edge are working fine.

In my org - ever since the release of Firefox 146 - each time an update is rolled out on a WIndows 11 endpoint - Firefox is no longer able to launch.

This is resolved by uninstalling and reinstalling the client. We've had no issues with the ESR release in my testing.

What changed? Anyone else experiencing this?

I had our security team take a look at the antivirus - they've confirmed we aren't blocking Firefox and they did not see any block reports.

No relevant policy changes have gone through around the time of the incident. Initially I suspected users were installing Firefox ESR from the Company Portal alongside the standard release - but confirmed this is not the case. Also ruled out browser extensions - error persisted across a config without any extensions.

Please let me know if there is troubleshooting info I can collect. I included info from my own browser, but I reinstalled on the 27th and it has been working since. However, it has broke specifically on the days new releases have come out.

Thank you for any suggestions!

I got so frustrated with not being able to reinstall Firefox because I kept getting the error message "Your Firefox profile cannot be loaded. It may be missing or inaccessible". So I deleted all the profiles after copying them to an external hard drive. Then I copied the file ending in.test from the Old Firefox data folder on my desktop to the AppData/Roaming/Mozilla/Firefox/ profile. Then I copied the biggest file ending in .default from the backed up Local profiles to the AppData/Local/Mozilla/Firefox/ profile. It doesn't matter if I delete or keep the Old Firefox data folder on my desktop, I still get the Profile Missing error message. What can I do, so my laptop would appear as if it had been powered up straight out of the box and never had Firefox initially installed or what do I do with my profiles to make them accessible?

When I open Firefox in Windows 11 a small window appears that reads, "Firefox Couldn't load XPCOM. I have not found any solutions to stop this that work. Will Mozilla fix this?

Version: Mozilla Firefox for Linux 149.0 Device: Termux v. 0.119.0-beta.3 Output: IceWM 4.0.0 + XServer XSDL v. 1.20.53 Log: ``` $ firefox --no-remote --alsa-output-device=default --display=:0 console.error: "Warning: unrecognized command line flag" "-alsa-output-device" Exiting due to channel error. Exiting due to channel error. Crash Annotation GraphicsCriticalError: |[C0] [GFX1-]: CompositorBridgeChild receives IPC close with reason=AbnormalShutdown (t=1.68679) Segmentation fault firefox --no-remote --alsa-output-device=default --display=:0 $ echo $? 130 ``` Reinstall tried. Refresh tried. Malware checked - none. Trouble Shooting mode log: ``` $ firefox --safe-mode Exiting due to channel error. Exiting due to channel error. Exiting due to channel error. Exiting due to channel error. Exiting due to channel error. Segmentation fault firefox --safe-mode $ echo $? 139 ``` Without tags start ``` $ firefox Exiting due to channel error. Exiting due to channel error. Bus error firefox $ echo $? 135 ``` Sometimes it can be started but not stable Maybe the problem is: problem with about:sessionrestore, everytime I open it, I can see about:sessionrestore page for short, and when it can start up (sometimes in troubleshooting mode), after choose a option, browser crash, and if I open another tag and close it, browser runs as normal.

Dell installed a command update and immediately afterwards, Firefox would no longer open, either from the taskbar icon or from settings/apps. I just get a couple of seconds of the blue cycle icon and then nothing, no error message, just nothing. I did download/install repeatedly but I don't get beyond the download screen - as soon as it's 100% downloaded, that's it, no welcome window, nothing. Thanks

since 3 days, after initiation of the Firefox the empty page appears with order to close firefox. A have reinstalled the new version several times withour anu change in the program behaviour

Hallo, ich finde auf deutsche keine Support-Seite um eine Frage zu stellen. Auf meinem alten WIN10 Pc lässt sich Firefox nicht mehr starten. Ich öffne es aus der Taskleiste oder von der Verknüpfung auf dem Desktop. Es tut sich aber nichts. Ausführen als Admin hilft auch nicht Ich hab dann über den Taskmanager geschaut ob das Programm im Hintergrund läuft. Dort wird es auch nicht angezeigt. Ich hab dann Firefox gelöscht und neu installiert. Aber das hilft nichts. Ich habe keine Ahnung was ich sonst machen kann. Über Google findet man dazu absolut nichts. Alles hat funktioniert aber von einem auf den anderen Tag ging nichts mehr. An meinem Anitvirus-Programm kann es NICHT liegen. Auch mit deaktiviertem Antivirus-Programm startet Firefox nixht mehr. Bitte um technischen Support. Danke

Hello, I can't find a support page in German to ask a question. Firefox won't start on my old Windows 10 PC anymore. I try opening it from the taskbar or the shortcut on the desktop. But nothing happens. Running as administrator doesn't help either. I checked the Task Manager to see if the program was running in the background. It's not showing up there either. I then deleted Firefox and reinstalled it. But that didn't help. I have no idea what else I can do. I can't find anything about this on Google. Everything was working fine, but then suddenly it stopped working. It can't be my antivirus program. Even with the antivirus program disabled, Firefox still won't start. Please provide technical support. Thank you.