I-Firefox Community Forum

As title: after running updates, Firefox consistently crashes when launching.

To give more concrete details:

-Running on Linux, specifically KDE Fedora 42. Firefox was updated to 142 from 141, alongside various other updates. -When launching Firefox from any source (directly, through a link, through the terminal etc.), the only window that appears is the crash reporter. -This issue occurs when launching in safe mode. Removing and reinstalling Firefox, including deleting the entire .mozilla folder in Home at the same time does not resolve the issue. I am unable to test rolling Firefox back to 141. -When attempting to launch from the terminal (safe mode or otherwise), the following is output (personal info redacted):

restorecon: SELinux: Could not get canonical path for /home/[username]/.mozilla/firefox/*/gmp-widevinecdm/* restorecon: No such file or directory.

/usr/include/c++/15/array:210: constexpr std::array<_Tp, _Nm>::value_type& std::array<_Tp, _Nm>::operator[](size_type) [with _Tp = HeaderBarButtonType; long unsigned int _Nm = 3; reference = HeaderBarButtonType&; size_type = long unsigned int]: Assertion '__n < this->size()' failed.

Redirecting call to abort() to mozalloc_abort

[ExceptionHandler generates a minidump etc.]

Gtk-Message: [timestamp]: Failed to load module "appmenu-gtk-module"

(I would note that to the best of my knowledge I had not included a plugin for decoding widevine in my Firefox setup, and certainly the Firefox 141 instance on the device being used to write this post (same OS) does not include it) -The crash files in the .mozilla folder, meanwhile, consistently list a segfault at address 0x0.

Any advice on diagnosing/solving this issue would be greatly appreciated. Let me know if there's any other information that would be helpful.

If it would be more appropriate, I could report this through Mozilla's bugzilla instance, but given the issue seems to be very niche (Fedora's ABRT shows a total of 5 unique affected users in the last few days) I am unsure whether flagging this there would be appropriate.

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. ```

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 ?

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

After an update minutes ago, Firefox immediately crashes on startup and crash reporter launches Rebooted computer. Launched firefox from command line with -safe-mode and -purgecaches

This is when the online help says to submit a report with the most recent bp-numbers. Thanks in advance for your assistance.

bp-2bd5243a-ff3d-4ea2-b0a2-ffb3d0260425 bp-28b30366-d7c1-46be-bc6b-1795a0260425 bp-e2aaa702-1190-4237-8ab3-7e5590260425 bp-93e9888c-569d-4148-b549-d97530260425 bp-d598e83a-3a9b-4874-b65a-ec7980260425

Sehr geehrtes Team, ich wurde aufgefordert, ein Upload zu starten bei Firefox. Das habe ich versucht. Ich erhalte die Meldung 'Couldn't load XPCOM' Was muss ich tun, um Firefox wieder zu starten ?? Wird dringend wg. Kontoprüfungen benötigt ! Kann dieses evtl. an fehlender Kapazität liegen ? Z.Zt. habe ich 371 MB von 111 KB zur Verfügung. Ich bitte Sie, mir schnell zu helfen - Danke vielmals. MfG Karin Gähler Telefon +49 [phone number removed]

- Had 3 windows open with numerous tabs and tab groups - Firefox sync was enabled, as well as a 2-3 plugins AFAIK - Version installed is latest as of this writing 139.0.4 - Initial crash caused by opening and quickly closing (IF that succeeded before crash) a onedrive share link - Cannot start firefox any more, also not in safe mode - the only thing that works is launching it with a fresh profile.

The report ID is bp-a8c824fc-a7fb-4290-a72b-b63160250620

Ideally I can resolve this without needing to refresh or start over with a new profile

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

Multiple attempts to open Firefox produced a popup window indicating that "platform version 153.0 is not compatible with min version 152.0.6 max version 152.0.6 Maybe try to reinstall Firefox." If this is the only solution, how do I do this and retain my bookmarks, themes, etc profile? Thank you.

Julian H. Ethridge [email removed]@frontier.com

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

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