This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

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

This thread was archived. Please ask a new question if you need help.

Firefox is not opening

  • 1 reply
  • 32 have this problem
  • 1 view
  • Last reply by TonyE

mandadinesh
mandadinesh
more options

Hi, I had been using Firefox since many years, but recently I am facing problem with this. When ever I try to open Firefox I get a message saying "The application or DLL c:\Program Files\Mozilla Firefox\MOZCRT19.dll is not a valid Windows image. Pleas check thsis against your installation diskette." and Firefox crashes automatically.

I could not use Firefox now, please help me. I feel comfortable working with firefox.

Awaiting your quick response.

Thaks & Regards, Dinesh

Hi, I had been using Firefox since many years, but recently I am facing problem with this. When ever I try to open Firefox I get a message saying "The application or DLL c:\Program Files\Mozilla Firefox\MOZCRT19.dll is not a valid Windows image. Pleas check thsis against your installation diskette." and Firefox crashes automatically. I could not use Firefox now, please help me. I feel comfortable working with firefox. Awaiting your quick response. Thaks & Regards, Dinesh

All Replies (1)

TonyE
TonyE
  • Moderator
more options

Since a file in the installation appears to be corrupt, try performing a clean re-install

  1. Download the latest version of Firefox from http://www.mozilla.com/
  2. Uninstall Firefox, but do not select the setting "Remove my Firefox personal data and customizations"
  3. Delete the Firefox Installation directory, default location on 32 bit Windows is C:\Program Files\Mozilla Firefox\
  4. Re-install Firefox

The above process does not delete the bookmarks, passwords and other user data. To be safe you can back them up first, for details see http://kb.mozillazine.org/Profile_backup

Modified by TonyE