Firefox 커뮤니티 포럼

Hello I had Mozilla Firefox as my default browser on my Mac laptop

I got a message this morning that Firefox could not open

I tried several times but no luck

I read through some of the online HELP sites and deleted the Firefox app and reloaded it

I also cleared the browsing history on SAFARI and CHROME although I couldn't see why that would work

Still not able to get FIREFOX to open

After upgrading to version 144 in Windows 11, the portable version of firefox stopped opening, the splash screen appears and shuts down. If you run firefox.exe, it works, but the portable program itself crashes and won't start. There is nothing in the logs, antivirus is off, windows security is turned off. How to fix this?

I have made multiple efforts to download Firefox onto a recently acquired laptop but it doesn't launch.

The laptop is a Dell Latitude 5520 running Windows 11 Pro.

I have on several occasions downloaded Firefox.exe (version 146.0.1.763), double clicked to start it, clicked to approve that the app can make changes and watched as the installation graphic fills and I get confirmation that installation has completed. Then nothing.

I have uninstalled the app and started again. No change.

The app appears in the list of apps (I have successfully made Firefox the default browser) but I don't know how to launch it.

I would be grateful if someone could provide the solution!

M

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

On my pc, Mozilla Firefox continuously loops the error message, “Firefox is already running, but is not responding. The old Firefox process must be closed to open a new window.” It then proceeds to close and loop this error. I have uninstalled and reinstalled multiple times, as well as did a “refresh” in deleting all my extensions and addons upon the new installation. Please advise. Thank you.

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?

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.

Every time i would open the app, it would crash immediately. I uninstalled and reinstalled, had the same issue. Recently updated to Win11. Reported each time but can't get into the app so don't know what the error is.