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Firefox crashes on start-up, even in safe mode

  • 4 replies
  • 5 have this problem
  • 22 views
  • Last reply by kb9fcc2

kb9fcc2
kb9fcc2
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Back in March/April 2012, Firefox started crashing for me on start up, possibly after the automatic/remote installation of MS security patches. After that time, I've not been able to start Firefox without it going directly to the Mozilla Crash Reporter. I've tried everything I could think of including safe-mode, uninstall/re-install, uninstall/back-up profiles directory/wipe profiles and all registry entries/re-install. This continues to fail since version 11(?) through 13.0.1. Even Sea Monkey crashes same manner. BTW, clicking on the "Details" button in the Mozilla Crash Reporter has no effect for me. I was trying it to help fill in the Troubleshooting Information box below as I can't get to "Help > Troubleshooting Information" as Firefox doesn't start.

Back in March/April 2012, Firefox started crashing for me on start up, possibly after the automatic/remote installation of MS security patches. After that time, I've not been able to start Firefox without it going directly to the Mozilla Crash Reporter. I've tried everything I could think of including safe-mode, uninstall/re-install, uninstall/back-up profiles directory/wipe profiles and all registry entries/re-install. This continues to fail since version 11(?) through 13.0.1. Even Sea Monkey crashes same manner. BTW, clicking on the "Details" button in the Mozilla Crash Reporter has no effect for me. I was trying it to help fill in the Troubleshooting Information box below as I can't get to "Help > Troubleshooting Information" as Firefox doesn't start.

Chosen solution

It looks like you have the Backdoor.Ulrbot.C malware on your system. We have some instructions for removing it here - https://support.mozilla.org/en-US/kb/Firefox%20crashes%20when%20you%20open%20it#w_backdoor-ulrbot-c

I looked though your crash reports and identified svrltmgr.dll as the file you need to delete.

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All Replies (4)

Michael Verdi
Michael Verdi
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Chosen Solution

It looks like you have the Backdoor.Ulrbot.C malware on your system. We have some instructions for removing it here - https://support.mozilla.org/en-US/kb/Firefox%20crashes%20when%20you%20open%20it#w_backdoor-ulrbot-c

I looked though your crash reports and identified svrltmgr.dll as the file you need to delete.

kb9fcc2
kb9fcc2 Question owner
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Thanks! That appears to be it. The "alarm bells" really started going off when I wasn't allowed access to the file to upload it to virusscan.jotti.org site in normal Windows mode. (In safe mode the scanner thought the file was fishy in ~50% of the cases). Removed the file and Firefox now starts cleanly. Thanks, again!

Now I just need to restore my old profile...sigh.

cor-el
cor-el
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  • Top 10 Contributor
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What was the location of the file?

See:

kb9fcc2
kb9fcc2 Question owner
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I was able to successfully restore the my old profile. I used the FAQ on "Transferring data to a new profile" without any problems. I had 7-zipped my old profile when I was having my crashing issues. Everything is working again.

Again, many thanks for all the help.

Modified by kb9fcc2