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!

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.

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

Can not open Firefox getting error message saying another page is open but there is not.

  • 2 replies
  • 5 have this problem
  • 3 views
  • Last reply by mastadizzy

more options

When I try and open my Firefox there is an error message that comes up that says Firefox is already running and I must close the other page but there is not another page open. I have shut down my computer and the message is still coming up.

When I try and open my Firefox there is an error message that comes up that says Firefox is already running and I must close the other page but there is not another page open. I have shut down my computer and the message is still coming up.

All Replies (2)

more options
more options

Hi,

Maybe this is just a one-off solution:

  • Open taskmanager (ctrl + shift + esc in vista)
  • Go to "processes"-tab
  • Search and select firefox.exe
  • Click on the button "end task"
  • Try to open firefox again

Kind regards, Joren

Edit: I think the link silkphoeni... posted is more complete.

Modified by mastadizzy