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Firefox Slow & Crashes

  • 6 replies
  • 28 have this problem
  • Last reply by cor-el

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Firefox memory usage goes up then crashes.

bp-a9fd4228-a721-4621-88fa-f92a12140217 2/17/2014 1:58 PM bp-6ecf4838-dda4-4d34-98bb-9c5b22140217 2/16/2014 9:31 PM bp-7862fa32-4fbf-476b-b65e-818582140216 2/16/2014 2:38 PM

All Replies (6)

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Try Firefox Safe Mode to see if the problem goes away. Firefox Safe Mode is a troubleshooting mode that turns off some settings and disables most add-ons (extensions and themes).

(If you're using an added theme, switch to the Default theme.)

If Firefox is open, you can restart in Firefox Safe Mode from the Help menu by clicking on the Restart with Add-ons Disabled... menu item:

If Firefox is not running, you can start Firefox in Safe Mode as follows:

  • On Windows: Hold the Shift key when you open the Firefox desktop or Start menu shortcut.
  • On Mac: Hold the option key while starting Firefox.
  • On Linux: Quit Firefox, go to your Terminal and run firefox -safe-mode
    (you may need to specify the Firefox installation path e.g. /usr/lib/firefox)

Once you get the pop-up, just select "'Start in Safe Mode" Safe Mode Fx 15 - Win

If the issue is not present in Firefox Safe Mode, your problem is probably caused by an extension, and you need to figure out which one. Please follow the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article to find the cause.

To exit Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.

When you figure out what's causing your issues, please let us know. It might help others with the same problem.

Thank you.

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You can also check for issues with plugins and the plugin-container process (plugins aren't affected by Safe Mode).

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Thanks for the reply. :) I did turn off plugins and still crashed. :( Ideas?

P.S. About to bail on firefox after using for 5 years. I can't seem to fix the problem.

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Does it still happen in Safe Mode?

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Yes, safe mode it still crashes.

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

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: