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Mozilla is crashing every time i open it

  • 3 replies
  • 14 have this problem
  • 8 views
  • Last reply by Narunaru

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This started the other day, but i opened it in safe mode and it worked okay. I closed it, and it won't open again. Computer restart, nothing Refresh firefox, nothing Uninstall and reinstall, nothing It won't open at all, and I've incedentally sent about twenty crash reports in the past five minutes. I can't even get it to open to show me if I'm really late on updates. I have always preferred Firefox to all other browsers, but for now, I resign myself to chrome, until someone can give me a solution.

This started the other day, but i opened it in safe mode and it worked okay. I closed it, and it won't open again. Computer restart, nothing Refresh firefox, nothing Uninstall and reinstall, nothing It won't open at all, and I've incedentally sent about twenty crash reports in the past five minutes. I can't even get it to open to show me if I'm really late on updates. I have always preferred Firefox to all other browsers, but for now, I resign myself to chrome, until someone can give me a solution.

Chosen solution

Start Firefox in Safe Mode {web link} While you are in safe mode;

Type about:preferences#advanced<Enter> in the address bar.

Under Advanced, Select General. Look for and turn off Use Hardware Acceleration.

Stay in safe mode.


In the address bar, type about:crashes<enter>. Note: If any reports do not have BP in front of the numbers, click it and select Submit.

Using your mouse, mark the most resent 7 - 10 crash reports, and copy them. Now go to the reply box below and paste them in.


If you can't get Firefox to open, you will have to do this the hard way. https://support.mozilla.org/en-US/kb/mozillacrashreporter Open the file browser / explorer on your computer. Note: You may have to enable Show Hidden Folders / Files. Enter this in the address bar;

Windows: %APPDATA%\Mozilla\Firefox\Crash Reports\submitted Win 7/Vista: C:\Users\<username>\AppData\Roaming\Mozilla\Firefox\Crash Reports\submitted Win XP/2000: C:\Documents and Settings\<username>\Application Data\Mozilla\Firefox\Crash Reports\submitted

Mac OS: /Users/<username>/Library/Application Support/Firefox/Crash Reports/submitted Linux: /home/<username>/.mozilla/firefox/Crash Reports/submitted

Copy the last 5-7 Recent File Names in the folder. Post the information in the reply box below.


Question. When in Safe Mode, can you access the web?

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Chosen Solution

Start Firefox in Safe Mode {web link} While you are in safe mode;

Type about:preferences#advanced<Enter> in the address bar.

Under Advanced, Select General. Look for and turn off Use Hardware Acceleration.

Stay in safe mode.


In the address bar, type about:crashes<enter>. Note: If any reports do not have BP in front of the numbers, click it and select Submit.

Using your mouse, mark the most resent 7 - 10 crash reports, and copy them. Now go to the reply box below and paste them in.


If you can't get Firefox to open, you will have to do this the hard way. https://support.mozilla.org/en-US/kb/mozillacrashreporter Open the file browser / explorer on your computer. Note: You may have to enable Show Hidden Folders / Files. Enter this in the address bar;

Windows: %APPDATA%\Mozilla\Firefox\Crash Reports\submitted Win 7/Vista: C:\Users\<username>\AppData\Roaming\Mozilla\Firefox\Crash Reports\submitted Win XP/2000: C:\Documents and Settings\<username>\Application Data\Mozilla\Firefox\Crash Reports\submitted

Mac OS: /Users/<username>/Library/Application Support/Firefox/Crash Reports/submitted Linux: /home/<username>/.mozilla/firefox/Crash Reports/submitted

Copy the last 5-7 Recent File Names in the folder. Post the information in the reply box below.


Question. When in Safe Mode, can you access the web?

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Boot the computer in Windows Safe Mode with network support (press F8 on the boot screen) as a test.

Create a new profile as a test to check if your current profile is causing the problem.

See "Creating a profile":

If the new profile works then you can transfer files from a previously used profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over problems.


Do a malware check with several malware scanning programs on the Windows computer. Please scan with all programs because each program detects different malware. All these programs have free versions.

Make sure that you update each program to get the latest version of their databases before doing a scan.

You can also do a check for a rootkit infection with TDSSKiller.

See also:

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Thank you both so much. Oddly, when I reinstalled a second time, it opened with no issues. Just the same, I turned off hardware acceleration like suggested. And yes, before, in safe mode, it worked with the internet just fine