Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

ابحث في الدعم

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

not able to install firefox

  • 5 ردود
  • 2 have this problem
  • 1 view
  • آخر ردّ كتبه anupam15

more options

Due to certain problem I ran a adware removal program after that not able to start firefox as error was reported failed to read the configuration file contact your system administrator(Screen shot enclosed) Removed the old firefox and tried to install the new downloaded firefox but still getting the same error please help how to overcome this problem

Due to certain problem I ran a adware removal program after that not able to start firefox as error was reported failed to read the configuration file contact your system administrator(Screen shot enclosed) Removed the old firefox and tried to install the new downloaded firefox but still getting the same error please help how to overcome this problem
Attached screenshots

الحل المُختار

The solution is perfect answer if system is infected by malware

cor-el said

Do a clean reinstall and delete the Firefox program folder before (re)installing a fresh copy of the current Firefox release. If possible uninstall your current Firefox version to cleanup the Windows registry and settings in security software.
  • Do NOT remove "personal data" when you uninstall your current Firefox version, because this will remove all profile folders and you lose personal data like bookmarks and passwords including data in profiles created by other Firefox versions.
Remove the Firefox program folder before installing that newly downloaded copy of the Firefox installer.
  • (32 bit Windows) "C:\Program Files\Mozilla Firefox\"
  • (64 bit Windows) "C:\Program Files (x86)\Mozilla Firefox\"
Your personal data like bookmarks is stored in the Firefox profile folder, so you won't lose personal data when you uninstall and (re)install or update Firefox, but make sure NOT to remove personal data when you uninstall Firefox as that will remove all Firefox profile folders and you lose your personal data.
Read this answer in context 👍 0

All Replies (5)

more options

Hi, please see - Uninstall Firefox from your computer - note, do not remove your User Profile.

If your question is resolved by this or another answer, please take a minute to let us know. Thank you.

more options

No even after uninstalling the firefox and then again downloading the problem is persisting

more options

Do a clean reinstall and delete the Firefox program folder before (re)installing a fresh copy of the current Firefox release.

If possible uninstall your current Firefox version to cleanup the Windows registry and settings in security software.

  • Do NOT remove "personal data" when you uninstall your current Firefox version, because this will remove all profile folders and you lose personal data like bookmarks and passwords including data in profiles created by other Firefox versions.

Remove the Firefox program folder before installing that newly downloaded copy of the Firefox installer.

  • (32 bit Windows) "C:\Program Files\Mozilla Firefox\"
  • (64 bit Windows) "C:\Program Files (x86)\Mozilla Firefox\"

Your personal data like bookmarks is stored in the Firefox profile folder, so you won't lose personal data when you uninstall and (re)install or update Firefox, but make sure NOT to remove personal data when you uninstall Firefox as that will remove all Firefox profile folders and you lose your personal data.


more options

الحل المُختار

The solution is perfect answer if system is infected by malware

cor-el said

Do a clean reinstall and delete the Firefox program folder before (re)installing a fresh copy of the current Firefox release. If possible uninstall your current Firefox version to cleanup the Windows registry and settings in security software.
  • Do NOT remove "personal data" when you uninstall your current Firefox version, because this will remove all profile folders and you lose personal data like bookmarks and passwords including data in profiles created by other Firefox versions.
Remove the Firefox program folder before installing that newly downloaded copy of the Firefox installer.
  • (32 bit Windows) "C:\Program Files\Mozilla Firefox\"
  • (64 bit Windows) "C:\Program Files (x86)\Mozilla Firefox\"
Your personal data like bookmarks is stored in the Firefox profile folder, so you won't lose personal data when you uninstall and (re)install or update Firefox, but make sure NOT to remove personal data when you uninstall Firefox as that will remove all Firefox profile folders and you lose your personal data.
more options

The problem occurs if system is infected by add by shopper like malware