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.

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

have downloaded4.0.1 three times and yet it's not running??

  • 1 (رد واحد)
  • 2 have this problem
  • 7 views
  • آخر ردّ كتبه Svetlana

more options

I keep receiving the warning that I need to upgrade to 4.0.1. I have done so 3 times already. Why is it not working?

I keep receiving the warning that I need to upgrade to 4.0.1. I have done so 3 times already. Why is it not working?

All Replies (1)

more options
  1. Exit Firefox (File>Quit) and check that no firefox.exe processes are running in task manager (ctrl+alt+del, processes tab). Try starting Firefox again and checking for the issue.
  2. If that doesn't work, please try to do a manual install. installing firefox