Forum der Gemeinschaft Firefox

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

firefox doesnt start and gives me this error If i uninstall the have a fresh, install, everything will work normally until i restart my pc

AvailablePageFile: 13664788480 AvailablePhysicalMemory: 20233519104 AvailableVirtualMemory: 138533665595392 BackgroundTaskMode: 0 BuildID: 20260116091309 CPUMicrocodeVersion: 0xa50000d CrashTime: 1769253421 HeadlessMode: 0 InstallTime: 1768730212 LastStartupWasCrash: 1 ModuleSignatureInfo: {"Mozilla Corporation":["firefox.exe","xul.dll","gkcodecs.dll","nss3.dll","mozglue.dll","lgpllibs.dll"],"Microsoft Windows Software Compatibility Publisher":["msvcp140.dll","VCRUNTIME140.dll","VCRUNTIME140_1.dll"],"Microsoft Windows":["wsock32.dll","DWrite.dll","textinputframework.dll","dbgcore.dll","dbghelp.dll","version.dll","CoreUIComponents.dll","CoreMessaging.dll","ktmw32.dll","WinTypes.dll","propsys.dll","uxtheme.dll","dwmapi.dll","kernel.appcore.dll","windows.storage.dll","ntmarta.dll","CRYPTBASE.dll","wldp.dll","ntasn1.dll","ncrypt.dll","msasn1.dll","profapi.dll","KERNELBASE.dll","ucrtbase.dll","bcryptPrimitives.dll","gdi32full.dll","win32u.dll","bcrypt.dll","msvcp_win.dll","wintrust.dll","cfgmgr32.dll","crypt32.dll","user32.dll","oleaut32.dll","shlwapi.dll","advapi32.dll","msvcrt.dll","imm32.dll","ole32.dll","rpcrt4.dll","shell32.dll","kernel32.dll","SHCore.dll","ws2_32.dll","gdi32.dll","sechost.dll","psapi.dll","combase.dll","msctf.dll","ntdll.dll"]} ProductID: {ec8030f7-c20a-464f-9b0e-13a3a9e97384} ProductName: Firefox ReleaseChannel: release SafeMode: 0 SecondsSinceLastCrash: 899 StartupCacheValid: 0 StartupCrash: 1 StartupTime: 1769253421 SubmittedFrom: Client SystemMemoryUsePercentage: 40 Throttleable: 1 TotalPageFile: 37688152064 TotalPhysicalMemory: 34198491136 TotalVirtualMemory: 140737488224256 UptimeTS: .1135774 Vendor: Mozilla Version: 147.0.1 Ce rapport contient également des informations techniques sur l’état de l’application lors du plantage.

I have updated FF on four PCs to 136.0.3. On just one PC, FF launches to a small window which is completely non-functional. None of the visible controls do anything. I can't move the window but I can resize it but everything is greyed out except the search bar. I can type in the search bar but get no search.

I have read a number of similar posts, but these fixes do not work: I cannot toggle the full screen using F12, I cannot change the launch behavior by setting 'maximize' in the shortcut properties, Deleting xulstore.json (repeatedly) does not fix (I have no localstore.rdf), I have no access to any of the normal FF controls that would let me refresh or troubleshoot.

I could always reinstall, but thought I would ask first.

When I turn on my Mac and click the Firefox browser icon, it will not load. It hangs. I get a "not responding" message and have to "force quit," again and again until FINALLY it loads, after five or more failed attempts. This does not happen with Firefox on my laptop, only my Mac. Both Firefox and my Mac are up to date. Why is this happening? Please help. It happens every day when I try to load the browser. I am about to give up and move to Safari. Relatedly, anyone know if it's possible to export all my bookmarks from Firefox to Safari?

Firefox has begun to instantly crash after opening. This occurs constantly, even though fresh installs, even if I run as administrator. It is the only application doing this, which is beyond weird. It seems to have begun happening after I opened a notepad file. Which seems ridiculous to me but that's when it initially crashed. If more information is required, please let me know, but I cannot even access say, crash logs.

Here is what the message says: "Firefox is trying to install a new helper tool. Enter your password to allow this" I tried to install but Firefox won't open. Firefox icon just bounces around, I have to force quit to stop it. I DO NOT WANT THIS TOOL BUT I WANT TO USE FIREFOX. By the way this is sent from my other user, as the problem is on my admin. user and I can't open Firefox to do anything!

After update to 140.0.2, clicking on Firefox icon in the dock does nothing. The title bar says Firefox is active, but nothing shows on my screen. What changed? Did you reset something in my preferences?

Is there a way to make the URL high lighting of the domain more obvious? I find that most people can barely see the highlighting and I'd like to make it obvious (bolder and red, or highlighted in yellow, for instance.)

Can this be done via userchrome.css?

Thanks,

Thane

Firefox tab crashes whenever I try to open Firefox. I have AOL and Firefox browser. I've tried the close and reload, restart laptop, and redownloading Firefox to no avail. However, I was able to open my AOL and email. I reached this help page using Edge.

CCleaner automatic upgrade to "ccleaner 7" killed Firefox! No other changes to the SW or machine. This computer works great every day. Fully up to date with Microsoft. The "upgrade" that I did not ask for, lost my license and switched me to the "free version of CCleaner. I uninstalled it and started over from CCleaner website. Worked fine with old version. It upgraded itself again and now Firefox is dead. Microsoft Edge does open. I never use this. Thanks

This is the message that pops up when I try to open Firefox: [Window Title] C:\Users\Kurt\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\Firefox.lnk

[Content] Windows cannot find 'C:\Users\Kurt\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\Firefox.lnk'. Make sure you typed the name correctly, and then try again.

[OK]

I have an M1 Macbook Pro running macOS 15.5 (24F74). Often after booting up my laptop when Firefox launches it freezes. When I long press on the Firefox icon it says "Application is not responding".

I found this post: https://www.reddit.com/r/firefox/comments/1fi4p94/firefox_freezing_on_start_on_macos/ which mentions an incompatibility with Firefox and Adobe Creative Cloud. Sure enough, when I quit Creative Cloud Firefox starts successfully.

Anyone have any ideas of what's causing this?

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!

Hello! I am an avid user of firefox (especially with adblockers) on a windows 11 PC. Unfortunately, I have recently been experiencing an issue where when I attempt to open firefox, a window will open for a split second before instantly closing again. My PC is up to date, I have tried refreshing firefox and doing a clean install, but cannot seem to overcome the issue, or even open it in safe mode. Does anyone have any advice? Many thanks in advance!

Firefox keeps crashing, or better doesnt even open. In Task Maneger on my Windows 11 System I didnt even see the task preformed. So I tried to uninstall Firefox and reinstall Firefox, still the same Problem. I tried to refresh Firefox but it was no use. Sometimes for a brief moment of time a small window opens with the Firefox logo, for two seconds I can read the word Firefox Troubleshoot but it closes instantly. I need Firefox as my Browser and would like to have it back in use as soon as possible. Thank you for your help LH

I downloaded firefox and it worked for about a month. Now when I try to launch it, the screen flashes momentarily as though it were about to pop up, but then it does not actually open a browser window. I have uninstalled and reinstalled firefox more than once, I've tried a simple restart of the computer, and tried multiple different update methods (updated windows). Any suggestions?