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Firefox has been working fine, but today when I clicked to start, I received an error message. "The file or directory is corrupted or unreadable." When trying to uninstall Firefox, Windows cannot find the uninstall helper. When I try to download a new version, I receive an error message: "Couldn't download - virus scan failed." Windows Security reports are all good. A scan found no viruses. Firefox will not open at all.

Please tell me how to resolve this issue. The 3 reports I have submitted from the crash window are:

Crash ID: bp-4107d3db-4280-445b-a0cd-e96400251020 [10/20/2025 2:43 PM (Pacific)] Crash ID: bp-b5e0bbf3-d4f6-4b2a-898a-f56960251020 [10/20/2025 2:40 PM (Pacific)] Crash ID: bp-975fcb26-5886-492f-8253-e37820251020 [10/20/2025 2:39 PM (Pacific)]

After Firefox updated today, the executable no longer starts. I get the following error message:

firefox.exe -- Bad Image

C:\Program Files\<mozilla firefox\gkcodecs.dll is either not designed to run on windows or it contains an error. error status 0x000000d. < p></mozilla>

And then another error message: Couldn't load XPCOM.

Please advise.

Hi, my Machine updated from 140.0.4 to 141.0 since then I cannot start up Firefox anymore. On startup after a short pause the Crash Reporter shows up - interestingly the Crash Reporter may enter a endless loop and opens up multiple times. While that the CPU load is at 100%. I tried

• `firefox --safe-mode`
• `firefox --ProfileManager`

as well, for those I get the same behavior. I tried downgrading to 140.0.4 - after that a profile dialog shows up which tells me that a new profile needs to be created due to a downgrade. After that Firefox comes up fine with the new vanilla profile. IF Firefox updates to 141.0 (in background) the next startup with the vanilla profile doesn't work gain. Which brings me back to the initial problem.

Workaround for now:

• download 140.0.4
• create a fresh profile
• immediately disable auto update
• live with the empty profile

My environment:

• Linux Debian 12 on x86_64
• KDE Plasma
• nvidia drivers installed
• I am using Firefox from `https://download-installer.cdn.mozilla.net/pub/firefox/releases`

I had two profiles, was in the process of trying to learn how to use the 2nd profile (as seen in the link below), which I still have no answer for. Somehow, maybe I held down SHIFT for too long and clicked on something by accident, idk, but somehow, I ended up REFRESHING the 2nd profile, causing it to delete everything I had done with it, and it backed up the old profile onto my desktop in the process. I figured I could just simply delete the new profile folder it had created and put back my old profile in the profile folder, but now, Firefox will not open at all, saying "Your Firefox profile cannot be loaded. It may be missing or inaccessible." How do I get it to recognize the profile folders again? OMG, I'm using Microsoft Edge, please, get me out of this!

https://support.mozilla.org/en-US/questions/1479231

I have this message after returning from nightly version to the stable one: ``` Using an older version of Firefox can corrupt bookmarks and browsing history already saved to an existing Firefox profile. To protect your information, create a new profile for this installation of Firefox. ```

Mozilla Firefox is very slow and even difficult to open.....I am using this browser since ten years and never had any problem....Please do the needful at your earliest...Thank a lot....RASIK MER

Actually this is just the only route I could figure out to your page where I had PREVIOUSLY asked this question and was checking back in to see whether 'the Community' had given me an answer yet. I'm no doubt IMPATIENT since my bank told me I need you, not Google and Microsoft Edge , who I both HATE for coming on to MY laptop, asking for more information sharing and basically DEMANDING I follow their marketing instructions since they had somehow REMOVED the X at the top right corner and simultaneously BLOCKED my access to and use of my OWN laptop, so that each time I have NO OPTION but to turn off the power on my laptop, to "reboot" as they once said. If even a basic, ancient telephone can be HUNG UP on scammers.....forgive me. I REALLY want to use your search engine, as WELL as your site. Please advise.

I launch Firefox from a shortcut in the QuickLaunch bar. I need to double-click that to get a response. But then TWO instances of Firefox open, and I have to close one - which seems a waste of time and effort over and over and over. My system is x32Win10ProV22H2. How to get just one instance ?

I can't open FIrefox. When I try to open it I get the following error message. "Firefox is already running, but is not responding. The old Firefox process must be closed to open a new window." I opened Task Manager and could not find any instance of Firefox or Mozilla running. I uninstalled Firefox and deleted all the files and folders having to do with Mozilla and Firefox. Then I reinstalled Firefox. I continue to get the same error message. I am running Windows 11 64bit on a Dell laptop. Any suggestions? Ray

Mozilla Firefox is very slow and even difficult to open.....I am using this browser since ten years and never had any problem....Please do the needful at your earliest...Thank a lot....RASIK MER

When I try to open Firefox it opens hundreds of crash reporter dialogue boxes and makes my computer slow to a halt, only restarting my computer can stop the onslaught. Resolving a dialogue/close all doesn't help.

I've tried holding shift to start in troubleshoot mode, but it just opens the crash boxes rather than the 'do you want to start in troubleshoot' box.

I've run a scan with Malwarebytes, no hits, and Windows says there's no updates for me. I can't see any specific crash number, the 'submit' file in my Crash Reports folder says this:

[WARN crashreporter::net::ping] not sending legacy crash ping because no ping directory configured [WARN crashreporter::logic] not updating the events file; no events directory configured [ERROR crashreporter::net::http] background task error: process failed (exit status exit code: 1073807364) with [ERROR crashreporter::net::http] background task error: process failed (exit status exit code: 1073807364) with stderr: stderr: er::glean::uploader] failed to send glean ping: process fail[ERROR crashreporter::glean::[ERROR crashreporter::net::http] background task error: process failed (exit status exit code: 1073807364) with stderr: upload] Recoverable upload failure while attempting to send ping 9746c2ff-0e8b-47b5-bc82-3a14fbf8a[ERROR crashreporter::net::http] background task error: process failed (exit status exit code: 1073807364) with stderr:

-- 0

[WARN glean_core::upload] Recoverable upload failure while attempting to send ping 7be8924c-9a93-4169-8ff3-c29b26b5f75c, will retry. Error was RecoverableFailure { unused: 0 } [WARN glean_core::upload::directory] Cannot find ping file to process 7be8924c-9a93-4169-8ff3-c29b26b5f75c

                                                                                                                                                                                                                                                         [ERROR crashreporter::net::http] background task error: process failed (exit status exit code: 0xc000026b) with stderr:

And here is what I get when I click 'details' on the crash reporter:

BuildID: 20250717180000 CrashTime: 1753234799 InstallTime: 1753232273 ModuleSignatureInfo: {"Microsoft Windows":["bcryptPrimitives.dll","wininet.dll","urlmon.dll","srvcli.dll","iertutil.dll","ktmw32.dll","version.dll","wsock32.dll","propsys.dll","uxtheme.dll","kernel.appcore.dll","windows.storage.dll","ntmarta.dll","netutils.dll","CRYPTBASE.dll","wldp.dll","ntasn1.dll","ncrypt.dll","msasn1.dll","sspicli.dll","profapi.dll","wintrust.dll","ucrtbase.dll","gdi32full.dll","bcrypt.dll","KERNELBASE.dll","crypt32.dll","msvcp_win.dll","win32u.dll","sechost.dll","imagehlp.dll","gdi32.dll","shlwapi.dll","ws2_32.dll","oleaut32.dll","SHCore.dll","advapi32.dll","psapi.dll","imm32.dll","msvcrt.dll","shell32.dll","kernel32.dll","combase.dll","ole32.dll","user32.dll","rpcrt4.dll","ntdll.dll","kbdus.dll"],"Mozilla Corporation":["firefox.exe","gkcodecs.dll","nss3.dll","mozglue.dll","lgpllibs.dll"],"Malwarebytes Inc":["mbae64.dll"],"Microsoft Windows Software Compatibility Publisher":["msvcp140.dll","VCRUNTIME140.dll","VCRUNTIME140_1.dll"]} ProductID: {ec8030f7-c20a-464f-9b0e-13a3a9e97384} ProductName: Firefox ReleaseChannel: release StartupTime: 1753234797 SubmittedFrom: Client Throttleable: 1 UptimeTS: 2.0 Vendor: Mozilla Version: 141.0 WindowsErrorReporting: 1 This report also contains technical information about the state of the application when it crashed.ii