Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Firefox suddenly will not open

  • 4 respostas
  • 1 has this problem
  • 2 views
  • Last reply by cor-el

more options

Firefox worked when I shut down the computer for the night. Next morning just get crash reporter.

Firefox worked when I shut down the computer for the night. Next morning just get crash reporter.

All Replies (4)

more options

Please provide us with crash ids;

1. Click the Windows Start button, and select Run... on Windows XP or press Windows Key + R on Windows Vista/7. Type in "%APPDATA%\Mozilla\Firefox\Crash Reports\submitted" including the quotation marks and click OK.

2. In the resulting folder will be a text file for each crash report you have submitted. Using the View menu, arrange them by date to find out which is the newest file; and double-click on it to open it.

3. Report back to us with the latest crash ids.

more options

Crash ID: bp-6258f40a-fceb-4b2d-afb2-a41562130114

more options

This crash is due to malware. Please see the below to fix this.

Sometimes a problem with Firefox may be a result of malware installed on your computer, that you may not be aware of.

You can try these free programs to scan for malware, which work with your existing antivirus software:

Microsoft Security Essentials is a good permanent antivirus for Windows 7/Vista/XP if you don't already have one.


Further information can be found in the Troubleshoot Firefox issues caused by malware article.

Did this fix your problems? Please report back to us!

more options

This crash is usually caused by to malware and the involved randomly named file in your case is yubhcimo.dll as you can see in the modules list of the crash report.

Try to use MSConfig and disable that file to prevent it from getting started.


Try to boot the computer in Windows Safe mode with network support (press F8 on the boot screen) to see if that allows to locate and remove the file either manually or with a malware scanner.

You will have to search the Windows registry (Ctrl+F) for references to that file and export and remove involved keys to avoid startup issues with missing files or alternatively use a registry cleaner like CCleaner. If you are not comfortable with editing the registry then it is best to skip this step.